PhenGold speeds up weight loss naturally, multi-action metabolism booster 🔥

  • CheckmarkMulti-action formula enhances your body's natural fat-burning abilities
  • CheckmarkBurns fat, reduces cravings and boosts metabolism, mood and energy
  • CheckmarkClinically proven ingredients and backed by our money back guarantee
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Real, lasting weight loss starts here

Combined with a healthy lifestyle, PhenGold can help you finally achieve your weight loss goals.

Jumpstart weight loss

Break frustrating plateaus

Hit your target weight

Look and feel your best

Success Stories

Thousands of dieters are enjoying
weight loss success with PhenGold

  • "I dropped 9 pounds"

    Within four weeks of adding PhenGold into my routine, I dropped 9 pounds and lost 2 inches around my waist! Seeing the weight dropping off gave me the boost I needed to keep going. And for the first time in months, I can feel my confidence. starting to return.

    Laura, New York, US

    Verified customer

  • "I was able to lose 21 pounds!"

    After taking PhenGold for 3 weeks I felt I had. more energy and better focus. Over a period. of four months I was able to lose 21 pounds! I now feel confident enough to join a gym and I'll be using PhenGold as a way to control my snacking and maintain my weight.

    Kristina, London, UK

    Verified customer

  • "I lost 19 pounds in four weeks"

    Phengold helped with curbing my appetite big time. I found that I didn't snack between meals at all. H lost 19 pounds in four weeks with taking phengold along with healthy eating and regular exercise.

    Julie, Ridgeville, US

    Verified customer

  • "A great product so far!"

    I have immensely enjoyed the success since using this product. My cravings have been tamed and I've enjoyed the increased levels of energy, competencies, and endurance. A great product so far!

    Derek, Downingtown, US

    Verified customer

  • "Exactly what I was looking for"

    I could see the difference in my weight maintenance as well as fat in the lower belly area after consuming the supplement for a week.

    Dhanushka

    Verified customer

  • "Improved my confidence"

    In just 6 months I lost almost 60 pounds!!!

    I love this supplement and the way it has improved my confidence. Thank you!!!

    Meghan, US

    Verified customer

  • "Thank you PhenGold for keeping me in shape"

    I love the energy it gives me especially when I go to the gym and at work, it keeps me up all night coz I work graveyard shift. I don't have to worry too much on dieting coz taking it provides you with "muscle memory" of when to stop eating or not.

    Melony, Las Vegas, US

    Verified customer

  • "Difference in my cravings and appetite"

    I have not yet finished my first month but have already noticed a difference in my cravings and appetite. I feel great and am beginning to. notice a change in my body composition - and it's not been even a month yet!

    Anthony, Westminster, US

    Verified customer

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Proven Weight Loss

Max strength, multi-action formula made with clinically proven ingredients helps you burn fat and. keep the weight off for good.

By increasing your metabolism, activating powerful fat-burning hormones and helping control hunger and cravings, PhenGold can help you lose weight more. quickly and more easily than through dieting and. exercise alone.

PhenGold further supports your weight loss efforts by boosting your energy and improving your mood,. helping make dieting a more pleasant, positive. experience.

Clinically Proven Ingredients

Max Strength Formula

No Prescription Required

With continued use, PhenGold can help you maintain your weight once you've reached your body goals.

1. Improves your body's ability to burn fat faster and more effectively

PhenGold "switches on" specific fat-burning hormones that tell your body to break down and burn stored fat. By activating hormones known to have a direct effect on fat burning, PhenGold can help you burn off even the most stubborn fat for good

"Within four weeks I dropped 9 pounds and lost 2 inches around my waist"

Kate, US

  • Caffeine, L-tyrosine, rhodiola, green tea and the capsaicin in cayenne pepper all help your body burn fat faster by increasing levels of fat-burning hormones HSL (hormone-sensitive lipase), epinephrine, norepinephrine and adiponectin[1].
  • Green tea, green coffee, caffeine and L-theanine can help shrink fat cells by significantly reducing triglycerides[2], a type of fat stored inside your fat cells and the main form of fat in your body.
  • Capsaicin in cayenne pepper may help reduce stubborn belly fat by boosting levels of a fat-burning enzyme called HSL (hormone-sensitive lipase) specifically in your abdominal area[3].

2. Boosts your metabolism, helping you burn more calories and more fat round-the-clock

The faster your metabolism, the faster your body burns fat. PhenGold stimulates your body's natural metabolic rate and speeds up the rate at which calories and stored fat are converted into energy. Which means you'll naturally burn more calories and more unwanted fat every day. Even while you're doing nothing..

"Seeing the weight dropping off. gave me the boost I needed to keep going"

Dave, US

  • Caffeine has been found in studies to increase metabolism by up to 11% and boost fat burning by as much as 29% [4].
  • Capsaicinoids in cayenne pepper could help you burn as many as 50 extra calories per day[5]. Studies have also found that green tea extract could help you burn up to 17% more fat, especially if taken before exercise[6].
  • B vitamins provide essential metabolism support[7] by helping convert carbohydrates, fats and proteins into energy instead of letting them turn to fat. Vitamin B6 also helps increase production of L-carnitine, an amino acid that helps your body burn fat.
  • Caffeine, green coffee, green tea and capsaicin increase levels of adiponectin, a fat-burning hormone which boosts your metabolism and improves your body's ability to use carbohydrates for energy instead of fat-storage[8].

3. Curbs cravings and hunger to. help you stop snacking and stay in control of your eating.

By acting as a natural appetite suppressant, PhenGold can help you feel fuller and help reduce food cravings in. between meals. Making it easier for you to avoid overeating, reduce your calorie intake and stay on track with your healthy diet

"I struggled with eating fewer. calories which inevitably led to. snacking. That's where PhenCold made the biggest. difference"

Jane, US

  • Capsaicin and caffeine are natural hunger suppressants. Studies have found that they can help reduce cravings and hunger, decrease your appetite and help you feel more full when you eat[9].
  • B vitamins could help curb carb and sugar cravings by helping your body use carbohydrates more effectively. Which means you won’t feel the need to eat more than you need.
  • B vitamins can help prevent stress-related food cravings because they play a vital role in helping your body manage stress - a key cause of cravings and increased appetite[10].
  • As natural mood boosters, L-theanine, L-tyrosine, B vitamins and DMAE may help you gain control over emotional eating by reducing the feelings of stress, anxiety and depression that can trigger the impulse to turn to food for comfort[11].

4. Increases your energy and. focus, giving you the power to tackle every day

Dieting - and daily life - can leave you feeling drained and low on energy. Whether you need extra power for your morning workout, a midday lift during a long. workday or a boost tackling the nightly bedtime routine with your little ones, PhenGold will give you the physical and mental energy to get through any day

"I felt I had more energy and better focus. For me, that was. what I needed to keep going."

Tiffany, US

  • Caffeine, green coffee and green tea help you feel more energized, awake and focused by blocking the release of adenosine, a chemical that makes you feel tired[12].
  • L-theanine enhances the energizing effects of caffeine while counteracting it’s drawbacks, helping you feel relaxed, less tired and more focused and alert.
  • Vitamins B3, B6 and B12 provide essential energy support by converting food into fuel, which helps maintain your energy levels and reduce tiredness and fatigue[13].
  • Rhodiola rosea can reduce feelings of weakness and fatigue and help improve your focus and concentration[14].

5. Enhances your mood, helping you stay motivated and focused on your goals

Dieting doesn't have to be depressing. PhenGold is packed with proven mood- boosting ingredients to help keep you. feeling bright and positive each and every day. Making it easier to stay motivated. stick to your plan and achieve your goals.

"For the first time in months, I can feel my confidence starting to return.."

Anusha, US.

  • L-tyrosine, L-theanine and caffeine boost your mood and promote feelings of positivity and happiness by increasing levels of dopamine, serotonin and norepinephrine, otherwise known as “happy hormones”[15].
  • B vitamins help brighten your mood and fend off the blues by converting amino acids into feel-good chemicals like serotonin and norepinephrine.
  • DMAE enhances your mood and motivation and reduces feelings of depression, anxiety and irritability[16].

Packed with scientifically-backed ingredients, PhenGold can help you finally achieve your health and weight loss goals

Order Now

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Quality assured

Scientifically formulated with safe natural clinically proven ingredients

Formulated by experts, PhenGold has been scrupulously designed and developed using carefully selected, exhaustively researched. clinically proven ingredients to create one of the most powerful and effective weight loss supplements available without a prescription.

PhenGold is manufactured in an FDA registered, GMP certified facility to the highest production standards under strict implementation of quality control and quality assurance regulations. Which means you can purchase PhenGold with confidence, knowing you are getting a guaranteed safe, quality weight loss supplement you can trust.

Each serving of PhenGold is packed with maximum strength amounts of the following ingredients that have been clinically proven to help you lose weight:

500mg Green Tea

Burns fat, boosts metabolism

100mg Green Coffee

Burns fat, boosts metabolism, increases energy

250mg L-Theanine

Boosts metabolism, improves mood and focus

350mg L-Tyrosine

Burns fat, improves mood and focus

250mg Rhodiola Rosea

Burns fat, increases energy

200mg Cayenne Pepper

Burns fat, boosts metabolism. suppresses appetite

225mg Caffeine

Burns fat, boosts metabolism, suppresses appetite increases energy and focus

150mg DMAE

Improves mood and motivation

Vitamins B3, B6, B12

Boosts metabolism, controls cravings, increases energy, improves mood

100% safe
and natural

No side
effects

Manufactured
in the USA

FD registered
GMP certified

Vegetarion and
vegan friendly

Soy, gluten, and
dairy free

Non-GMO
ingredients

No fillers
nothing artificial

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Guaranteed safe and effective

A new you

Put your weight loss worries behind you with PhenGold

  • No more hiding your body underneath baggy, shapeless clothes

  • Get dressed every day in clothes that you love and feel good in

  • Enjoy shopping, knowing you can buy what you want, not whatever fits

  • Look forward to holidays and special events, confident you'll always look your best

  • Celebrate the reflection you see every time you look in the mirror

  • Love your body again and feel happy, healthy and confident every day

Order Now

Free shipping and 100% secure checkout

Purchase risk free

100-day, guaranteed weight loss money back guarantee

But if, after giving it an honest try for at least 50 days,. you don't believe PhenGold is supporting your weight. loss efforts, simply email us within 50-100 days of. receiving your order and we'll happily refund your. money, excluding a $15 fixed fee to cover shipping and admin costs*.

*Terms and conditions apply. Guarantee applies to purchases of over one. month's supply and only on first purchase. Click here to read the full terms of our refund policy.

Scientifically formulated with clinically backed ingredients

Max strength formula for fast. effective weight loss

Powerful fat burning without a prescription

Fed up with weight loss supplements that don't work?
It's time to try PhenGold.

Made with clinically proven ingredients and backed by our money back guarantee*. Get FREE shipping and save 10% instantly when you use the code "SAVE10" at the checkout now

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PHENGOLD - METABOLISM BOOSTER

Rated 4.6/5 by thousands of slimmer customers

PhenGold speeds up weight loss naturally, helping you lose weight quickly and effectively.

Subscribe & Save 20% ($47.99)

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HOW THE SUBSCRIPTION WORKS

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Frequently Asked Questions

You'll find the answers to our most frequently asked questions below. If your question hasn't been covered or if you'd like further information about any of the topics covered below, please feel free to get in touch. Our Customer Care team is available 24/7 and will be delighted to talk to you about PhenGold. Click here to contact us.

PhenGold is available to purchase from the website HealthNutrition.com and is also available on Amazon.com, Walmart.com and other select suppliers.  Currently PhenGold is not available at GNC or other local retailers. We recommend purchasing directly at HealthNutrition.com to avoid fake or counterfeit products.
Just take three PhenGold capsules 20 minutes before your breakfast every morning, ideally before a workout.
Yes, PhenGold works. Every ingredient has been exhaustively researched and chosen specifically for its proven ability to help you lose weight. Extensive clinical studies have been carried out on the ingredients contained in PhenGold verifying their weight loss benefits. Pair with a calorie-controlled diet and regular exercise, to supercharge your weight loss results.
If you follow a healthy diet, exercise regularly and take PhenGold as directed, you could expect to see results within just a few weeks. Most of our customers enjoy visible weight loss within the first few months. Individual results will vary.

No weight loss supplement is a quick fix. The longer you supplement with PhenGold the better results you can expect. You will lose more weight when you combine PhenGold with healthy lifestyle changes like eating a balanced, nutritious diet and getting regular physical activity.
PhenGold contains 30 servings (90 capsules).
We offer an industry-leading 100-day money-back guarantee. If, after using PhenGold as directed alongside a suitable diet and exercise program for at least 50 days, you don’t believe PhenGold is supporting your weight loss efforts, simply email us within 50-100 days of receiving your order and we will happily refund your money, excluding a $15 fixed fee to cover shipping and admin costs. Terms and conditions apply. Please click here to read the full terms of our refund policy.
PhenGold is completely safe. That’s because we use only 100% natural ingredients that have been thoroughly researched, tested and proven to be safe and effective.

PhenGold does contain 225mg of caffeine, 500mg of green tea and 100mg of green coffee per daily dose. So if you’re sensitive to caffeine or if you do experience any adverse effects from these stimulants, we recommend you limit or avoid your use of any other caffeinated products while you’re taking PhenGold.

A small number of customers have reported feelings of dizziness, shakiness and/or headaches when using PhenGold. We have found that ensuring PhenGold is taken before food as directed and decreasing or avoiding use of other caffeinated products while using PhenGold resolves these symptoms.

PhenGold is not recommended if you are pregnant or breastfeeding. If you have any existing health issues or you are currently taking any medication, you should consult your healthcare professional before taking PhenGold to ensure it is suitable for you. Otherwise, PhenGold is safe for healthy adults when used as directed.
PhenGold is manufactured in FDA registered, Good Manufacturing Practice (GMP) certified facilities in the USA. This means that PhenGold is produced and controlled to international quality standards throughout every step of the manufacturing process. So you can be sure that when you order PhenGold, you are getting a safe supplement of the highest quality.
We are entirely open and transparent about exactly what goes into PhenGold and we fully disclose every ingredient, including their exact amounts. There are no hidden ingredients, no “secret” ingredients and we do not use any “proprietary” blends.
We currently ship to USA, UK and Canada.
Delivery times depend on your location. Assuming you place an order before 13:00 Monday-Friday, and your products are in stock, you can expect the following delivery times:

USA: 3-7 working days
UK: 3-7 working days
Canada: 5-10 working days

No comparison

Find out what makes PhenGold one of the leading weight loss supplements on the market.

We want you to feel as confident as us that when you purchase. PhenGold, you're getting one of the most powerful, effective and. scientifically proven weight loss supplements on the market. So take a look at the articles below to see for yourself how PhenGold. compares to similar supplements

PhenGold vs PhenQ: Which Is Best?

You can seriously speed up your weight loss and muscle gain with the right supplement. But with so many fat burners and weight loss pills

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PhenGold vs Phen375: Which Weight Loss Supplement Is Best?

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PhenGold. The gold standard of
weight loss supplements.

Scientifically-backed weight loss. Guaranteed

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Clinical References

  • Capsaicin significantly up-regulated levels of genes involved in lipid catabolism such as hormone sensitive lipase (HSL):
    Lee MS, Kim CT, Kim IH, Kim Y. Effects of capsaicin on lipid catabolism in 3T3-L1 adipocytes. Phytother Res. 2011 Jun;25(6):935-9. doi: 10.1002/ptr.3339. Epub 2010 Nov 17. PMID: 21626599
  • Capsaicin treatment boosted visceral adipose expression of hormone-sensitive lipase:
    Kang JH, Kim CS, Han IS, et al. Capsaicin, a spicy component of hot peppers, modulates adipokine gene expression and protein release from obese-mouse adipose tissues and isolated adipocytes, and suppresses the inflammatory responses of adipose tissue macrophages. FEBS Lett 2007;581:4389–96. doi:10.1016/j.febslet.2007.07.082
  • Topical application of capsaicin increased expression of adiponectin, significantly reduced visceral fat and markedly reduced the size of fat cells in mice:
    Lee GR, Shin MK, Yoon DJ, Kim AR, Yu R, Park NH, Han IS. Topical application of capsaicin reduces visceral adipose fat by affecting adipokine levels in high-fat diet-induced obese mice. Obesity (Silver Spring). 2013 Jan;21(1):115-22. doi: 10.1002/oby.20246. PMID: 23505175
  • Tyrosine is the precursor of epinephrine:
    National Library of Medicine, Compound Summary: Tyrosine 
  • Rhodiola rosea stimulates norepinephrine activity:
    American Botanical Council, Issue: 56, Page: 40-52,  Rhodiola rosea: A Phytomedicinal Overview 
  • Caffeine Increases blood levels of epinephrine and norepinephrine: 
    Keijzers GB, De Galan BE, Tack CJ, Smits P. Caffeine can decrease insulin sensitivity in humans. Diabetes Care. 2002 Feb;25(2):364-9. doi: 10.2337/diacare.25.2.364. PMID: 11815511
  • Capsaicin stimulates the release of adrenaline (epinephrine):
    Tremblay A, Arguin H, Panahi S. Capsaicinoids: a spicy solution to the management of obesity? Int J Obes (Lond). 2016 Aug;40(8):1198-204. doi: 10.1038/ijo.2015.253. Epub 2015 Dec 21. PMID: 26686003
  • Green tea increases thermogenesis and inhibits an enzyme that degrades norepinephrine:
    Shixian Q, VanCrey B, Shi J, Kakuda Y, Jiang Y. Green tea extract thermogenesis-induced weight loss by epigallocatechin gallate inhibition of catechol-O-methyltransferase. J Med Food. 2006 Winter;9(4):451-8. doi: 10.1089/jmf.2006.9.451. PMID: 17201629
  • A review of studies suggests a positive association between coffee and adiponectin level and the positive role of green tea in adiponectin concentration:
    Izadi V, Larijani B, Azadbakht L. Is Coffee and Green Tea Consumption Related to Serum Levels of Adiponectin and Leptin? Int J Prev Med. 2018 Dec 5;9:106. doi: 10.4103/ijpvm.IJPVM_37_14. PMID: 30622689
  • Both in vitro and animal experiments have shown that green tea catechins can significantly reduce levels of plasma triglycerides:   Xu, R., Yang, K., Li, S. et al. Effect of green tea consumption on blood lipids: a systematic review and meta-analysis of randomized controlled trials. Nutr J 19, 48 (2020). https://doi.org/10.1186/s12937-020-00557-5 
  • Theanine and green tea catechins significantly reduced triglyceride levels in the serum and livers of laboratory mice: Zheng G, Sayama K, Okubo T, Juneja LR, Oguni I. Anti-obesity effects of three major components of green tea, catechins, caffeine and theanine, in mice. In Vivo. 2004 Jan-Feb;18(1):55-62. PMID: 15011752
Both in vitro and animal experiments have shown that green tea catechins can significantly reduce levels of plasma triglycerides:   Xu, R., Yang, K., Li, S. et al. Effect of green tea consumption on blood lipids: a systematic review and meta-analysis of randomized controlled trials. Nutr J 19, 48 (2020). https://doi.org/10.1186/s12937-020-00557-5 
Theanine and green tea catechins significantly reduced triglyceride levels in the serum and livers of laboratory mice: Zheng G, Sayama K, Okubo T, Juneja LR, Oguni I. Anti-obesity effects of three major components of green tea, catechins, caffeine and theanine, in mice. In Vivo. 2004 Jan-Feb;18(1):55-62. PMID: 15011752
  • Caffeine ingestion increased energy expenditure 13% and doubled the turnover of lipids in healthy young men: Acheson KJ, Gremaud G, Meirim I, Montigon F, Krebs Y, Fay LB, Gay LJ, Schneiter P, Schindler C, Tappy L. Metabolic effects of caffeine in humans: lipid oxidation or futile cycling? Am J Clin Nutr. 2004 Jan;79(1):40-6. doi: 10.1093/ajcn/79.1.40. PMID: 14684395 
  • 100mg caffeine increased the resting metabolic rate of both lean and postobese human volunteers by 3-4%: Dulloo, A., Geissler, A.C., Horton, T., Collins, A. & Miller, D.S. (1989): ‘Normal caffeine consumption: influence on thermogenesis and daily energy expenditure in lean and postobese human volunteers’. American Journal of Clinical Nutrition, 1989 Jan;49(1):44-50. PMID 2912010
  • Caffeine-induced thermogenesis increased metabolic rate by 4% in healthy male volunteers: Koot P, Deurenberg P. Comparison of changes in energy expenditure and body temperatures after caffeine consumption. Ann Nutr Metab. 1995;39(3):135-42. doi: 10.1159/000177854. PMID: 7486839
  • Coffee-induced thermogenesis increased lipid oxidation by 29 and 10% in lean and obese women, respectively: Bracco D, Ferrarra JM, Arnaud MJ, Jéquier E, Schutz Y. Effects of caffeine on energy metabolism, heart rate, and methylxanthine metabolism in lean and obese women. Am J Physiol. 1995 Oct;269(4 Pt 1):E671-8. doi: 10.1152/ajpendo.1995.269.4.E671. PMID: 7485480
  • Consumption of capsaicinoids increases energy expenditure by approximately 50 kcal/day:
    Whiting S, Derbyshire E, Tiwari BK. Capsaicinoids and capsinoids. A potential role for weight management? A systematic review of the evidence. Appetite. 2012 Oct;59(2):341-8. doi: 10.1016/j.appet.2012.05.015. Epub 2012 May 22. PMID: 22634197
  • Average fat oxidation rates were 17% higher after ingestion of green tea extract than after ingestion of placebo: Venables MC, Hulston CJ, Cox HR, Jeukendrup AE. Green tea extract ingestion, fat oxidation, and glucose tolerance in healthy humans. Am J Clin Nutr. 2008 Mar;87(3):778-84. doi: 10.1093/ajcn/87.3.778. PMID: 18326618
  • A review of studies suggests a positive association between coffee and adiponectin level and the positive role of green tea in adiponectin concentration: Izadi V, Larijani B, Azadbakht L. Is Coffee and Green Tea Consumption Related to Serum Levels of Adiponectin and Leptin? Int J Prev Med. 2018 Dec 5;9:106. doi: 10.4103/ijpvm.IJPVM_37_14. PMID: 30622689 
  • Topical application of capsaicin increased expression of adiponectin, significantly reduced visceral fat and markedly reduced the size of fat cells in mice: Lee GR, Shin MK, Yoon DJ, Kim AR, Yu R, Park NH, Han IS. Topical application of capsaicin reduces visceral adipose fat by affecting adipokine levels in high-fat diet-induced obese mice. Obesity (Silver Spring). 2013 Jan;21(1):115-22. doi: 10.1002/oby.20246. PMID: 23505175
  • Adiponectin can cause weight loss by raising metabolic rate: Penn Medicine News, Apr 21, 2004, Fat Cell Hormone Adiponectin Causes Weight Loss Without Affecting Appetite
  • Adiponectin has been postulated to play an important role in the modulation of glucose and lipid metabolism in insulin-sensitive tissues in both humans and animals: American Diabetes Association, Adiponectin: More Than Just Another Fat Cell Hormone?, Diabetes Care 2003 Aug; 26(8): 2442-2450
  • Addition of capsaicin to the diet increases satiety and fullness, and tends to prevent overeating when food intake is ad libitum: Janssens PL, Hursel R, Westerterp-Plantenga MS. Capsaicin increases sensation of fullness in energy balance, and decreases desire to eat after dinner in negative energy balance. Appetite. 2014 Jun;77:44-9. doi: 10.1016/j.appet.2014.02.018. Epub 2014 Mar 12. PMID: 24630935. 
  • Bioactive ingredients may be helpful in reducing energy intake and might support weight loss periods by relatively sustaining satiety and suppressing hunger: Reinbach HC, Smeets A, Martinussen T, Møller P, Westerterp-Plantenga MS. Effects of capsaicin, green tea and CH-19 sweet pepper on appetite and energy intake in humans in negative and positive energy balance. Clin Nutr. 2009 Jun;28(3):260-5. doi: 10.1016/j.clnu.2009.01.010. Epub 2009 Apr 3. PMID: 19345452. 
  • Caffeine ingested 0.5-4 h before a meal may suppress acute energy intake: Schubert MM, Irwin C, Seay RF, Clarke HE, Allegro D, Desbrow B. Caffeine, coffee, and appetite control: a review. Int J Food Sci Nutr. 2017 Dec;68(8):901-912. doi: 10.1080/09637486.2017.1320537. Epub 2017 Apr 27. PMID: 28446037.
  • Micronutrient supplementation has a beneficial effect on perceived stress, mild psychiatric symptoms, and aspects of everyday mood in apparently healthy individuals. Supplements containing high doses of B vitamins may be more effective in improving mood states: Long SJ, Benton D. Effects of vitamin and mineral supplementation on stress, mild psychiatric symptoms, and mood in nonclinical samples: a meta-analysis. Psychosom Med. 2013 Feb;75(2):144-53. doi: 10.1097/PSY.0b013e31827d5fbd. Epub 2013 Jan 29. PMID: 23362497.
  • Oral intake of L-Theanine could cause anti-stress effects via the inhibition of cortical neuron excitation: Kimura K, Ozeki M, Juneja LR, Ohira H. L-Theanine reduces psychological and physiological stress responses. Biol Psychol. 2007 Jan;74(1):39-45. doi: 10.1016/j.biopsycho.2006.06.006. Epub 2006 Aug 22. PMID: 16930802 
  • L-theanine has the potential to promote mental health in people with stress-related ailments and cognitive impairments: Hidese S, Ogawa S, Ota M, Ishida I, Yasukawa Z, Ozeki M, Kunugi H. Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients. 2019 Oct 3;11(10):2362. doi: 10.3390/nu11102362. PMID: 31623400;  
  • Tyrosine significantly decreased symptoms, adverse moods, and performance impairments in response to environmental stress: Banderet LE, Lieberman HR. Treatment with tyrosine, a neurotransmitter precursor, reduces environmental stress in humans. Brain Res Bull. 1989 Apr;22(4):759-62. doi: 10.1016/0361-9230(89)90096-8. PMID: 2736402
  • Deanol (2-dimethylaminoethanol) reduced depression, irritability and anxiety, and increased motivation-initiative: Ferris SH, Sathananthan G, Gershon S, Clark C. Senile dementia: treatment with deanol. J Am Geriatr Soc. 1977 Jun;25(6):241-4. doi: 10.1111/j.1532-5415.1977.tb00407.x. PMID: 864168
  • Caffeine increases alertness and reduces fatigue: Smith A. Effects of caffeine on human behavior. Food Chem Toxicol. 2002 Sep;40(9):1243-55. doi: 10.1016/s0278-6915(02)00096-0. PMID: 12204388
  • Caffeine works as a nonselective blocker of adenosine receptors: Rivera-Oliver M, Díaz-Ríos M. Using caffeine and other adenosine receptor antagonists and agonists as therapeutic tools against neurodegenerative diseases: a review. Life Sci. 2014 Apr 17;101(1-2):1-9. doi: 10.1016/j.lfs.2014.01.083. Epub 2014 Feb 13. PMID: 24530739
  • Rhodiola may be an effective treatment in subjects suffering from prolonged or chronic fatigue: Lekomtseva Y, Zhukova I, Wacker A. Rhodiola rosea in Subjects with Prolonged or Chronic Fatigue Symptoms: Results of an Open-Label Clinical Trial. Complement Med Res. 2017;24(1):46-52. doi: 10.1159/000457918. Epub 2017 Feb 17. PMID: 28219059 
  • Rhodiola rosea demonstrated statistically significant improvements in cognition, memory, and concentration, suggesting that rhodiola rosea can reduce general fatigue:  Darbinyan V, Kteyan A, Panossian A, Gabrielian E, Wikman G, Wagner H. Rhodiola rosea in stress induced fatigue--a double blind cross-over study of a standardized extract SHR-5 with a repeated low-dose regimen on the mental performance of healthy physicians during night duty. Phytomedicine. 2000 Oct;7(5):365-71. doi: 10.1016/S0944-7113(00)80055-0. PMID: 11081987
  • Rhodiola rosea exerts an anti-fatigue effect that increases mental performance, particularly the ability to concentrate: Olsson EM, von Schéele B, Panossian AG. A randomised, double-blind, placebo-controlled, parallel-group study of the standardised extract shr-5 of the roots of Rhodiola rosea in the treatment of subjects with stress-related fatigue. Planta Med. 2009 Feb;75(2):105-12. doi: 10.1055/s-0028-1088346. Epub 2008 Nov 18. PMID: 19016404
  • Oral administration of tyrosine can increase brain norepinephrine concentrations and activity: Gelenberg AJ, Wojcik JD, Gibson CJ, Wurtman RJ. Tyrosine for depression. J Psychiatr Res. 1982-1983;17(2):175-80. doi: 10.1016/0022-3956(82)90019-x. PMID: 6764934
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