Daily Nootropic for Men

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  • $89
  • $59
  • SAVE 34%

Less than $2/day • Clinical Doses, 3rd Party Tested • Made in the USA

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NEW YEAR SALE: SAVE 34% FOR LIFE
  • Save 34% on Every Order For Life
  • Free Shipping on All Orders
  • Ships in 1 Business Day
  • 1 Bottle Delivered Monthly
  • 120 Capsules, 30 Servings
  • Refill ships in 30 days
  • Change or Cancel Anytime

You will receive a 30 day supply every 30 days. You can easily adjust or cancel at any time. By subscribing, you get discounted pricing and subscriber only benefits and gifts. One time purchase option also available below.

Try Breadwinner risk-free for 90 days.
If you’re not satisfied, we’ll will refund you, no
questions asked. Reclaim your mental clarity, risk-
free.

What Happens When You Take Breadwinner Daily

Unshakable Focus & Clarity

Stay locked in and eliminate distractions so deep work comes naturally.

Relentless Motivation

Turn ambition into action and execute with confidence, every day.

Stronger Mental Endurance

Power through long days without burnout or fatigue slowing you down.

Science-Backed Cognitive Performance

Clinically-dosed ingredients enhance motivation, focus, and mental endurance.

Here’s What Your Breadwinner Journey Will Look Like

01 ACTIVATION (DAYS 0–7)

The mental fog lifts. Motivation kicks in. You feel sharper, more alert, and ready to execute.

02 MOMENTUM (Days 7–30)

Distractions fade. Deep focus becomes effortless. Stress rolls off, and your endurance steps up.

03 OPTIMIZATION (Days 30–60)

Your drive, focus, and stamina feel automatic. Long days don’t slow you down. Productivity soars.

04 MASTERY (Days 60+)

Mental sharpness, resilience, and unstoppable energy become second nature. This is your new normal.

What is Breadwinner?

Breadwinner is a daily nootropic designed for men who lead, provide, and perform. It fuels motivation, focus, and mental endurance so you stay sharp and driven all day.

Is this harmful to take with medication?

Breadwinner is safe for most men, but if you're taking medication, consult your doctor before use.

Who is Breadwinner for?

It's for husbands, fathers, and providers—men who can't afford to burn out or fall behind.

How do I take Breadwinner?

Take 4 capsules each morning with food to fuel your focus, drive, and endurance all day.

How long until I see results?

Most men feel a difference in focus and energy within the first week. Full benefits build over 30-60 days.

How does this compare to energy drinks or coffee?

Breadwinner gives you smooth, crash-free focus without overstimulation, unlike energy drinks that rely on sugar and caffeine spikes.

Will Breadwinner improve my motivation and productivity?

Yes—it boosts dopamine and enhances focus, making it easier to stay driven, execute tasks, and power through long days.

Can Breadwinner help increase my energy?

Yes, but without the jitters or crashes. It fuels steady, all-day energy by supporting dopamine, mitochondrial function, and mental endurance.

Will Breadwinner improve my workouts or gym performance?

It's designed for mental endurance and focus, which can help you push through tough workouts, stay locked in, and recover mentally.

Do I need to cycle Breadwinner?

No. Breadwinner is safe for daily, long-term use with no need to cycle on and off.

Do I have to sign up for a subscription?

Yes, subscribers get 22% off every month, plus exclusive bonuses and early access to new products. You can easily cancel or modify your delivery schedule anytime.

What is your 90-day guarantee? Do you accept returns?

Yes. Try Breadwinner risk-free for 90 days. If you're not satisfied, we'll refund you—no questions asked.

Breadwinner Powers
The Three
Pillars
of
Provider Performance

Try Breadwinner Today

 Try it for 90 days. More focus, or your money back.

Unstoppable Momentum
For
the Man
They
Depend On

Breadwinner is packed with clinically-backed
ingredients to fuel your motivation, sharpen your focus,
and fortify your mental
endurance
—so you can power
through, day after day.

Motivation

L-Tyrosine 500 mg

Fuels dopamine production, priming your brain for faster action and sharper decision-making when it matters most.

Acetyl-L-Carnitine 250 mg

Enhances dopamine receptor efficiency, ensuring your brain converts motivation into execution, not just fleeting ideas.

Focus

Lion’s Mane 1,000 mg

Clinically shown to boost attention by 300% compared to placebo in 2 hours, so you stay locked in when others lose focus.

Citicoline 250 mg

Proven to cut attentional errors by 86% and impulsive mistakes by 50%, sharpening reaction speed and mental processing.

L-Theanine 100 mg + Caffeine 65 mg

A science-backed combo that improves focus and alertness by 20%, delivering smooth, jitter-free energy without the crash.

Endurance

Phosphatidylserine 200 mg

Lowers cortisol, the stress hormone that drains energy and mental clarity, keeping your mind composed under pressure.

Rhodiola Rosea 200 mg

Clinically shown to reduce fatigue by 20% and sustain performance in high-stress situations, keeping you sharp when the stakes are high.

Bioavailability

BioPerine® 5 mg

Boosts ingredient absorption by up to 200%, ensuring every dose hits harder, works faster, and lasts longer.

  •  Made in a cGMP Facility
  •  Non-GMO
  •  Third-Party Tested
  •  Made in the USA
  •  Hormone-Free
  •  No Artificial Stimulants
View Nutrition Label

Try it for 90 days. More focus, or your money back.

Here's what guys are
saying
after just a few
weeks

Swipe Up
for next video

Customer Reviews

Overall rating: 4.4 / 5 from 89 reviews.

Customer photo review of Daily Nootropic for Men

The product works great. I have chronic fatigue from a brain tumor so I’m really hoping these guys don’t go out of business! I take 6 caps as they recommend on the lil paper pamphlet that comes with it, with my coffee in the morning, then 4 after lunch. Not every day though! I try to refrain from it on the weekend so my body is ready for it during the week.

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

Definitely been helping at work. I feel more clear headed and calm. People seem to notice a happier and more willing person. I think I will pair this with creatine.

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

Helps me lock in on those long days so I can get more done when the pressure is on. Having time and energy left for the family at the end of the day is a priority and breadwinner helps me get there.

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

My daily regime. I fast from dinner until 11.00 - 12.00. But I take my Breadwinner plus some protein at about 8.00. I will be 75 this year and Breadwinner helps keep my thinking sharp.

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

This product has really increased my mental capacity and ability to manage stress and make decisions during chaotic moments with clarity. I also take fewer naps in the afternoon than I did before breadwinner. It's not a huge head buzz type of product but it is strongly noticeable especially starting week 2 on. I'm very grateful for this product. It is now a part of my daily routine, I look forward to early morning time spent in prayer, reading the Bible and taking my breadwinner as I prepare for my day. I highly recommend, God bless.

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

After taking breadwinner for a week I am noticing focus and calmness I haven’t felt for a long time. I can actually write without shaking.

Daily Nootropic for Men

Store owner replied: Incredible, thanks for sharing that Brent!

Customer photo review of Daily Nootropic for Men

Overall great! Looking forward to the feeling after continuous use for a few months. My preference is to take on an empty stomach and it works pretty well.

Daily Nootropic for Men

Store owner replied: So thrilled to hear that, Kevin - thanks for sharing!

Customer photo review of Daily Nootropic for Men

I take my pills every day with me no matter what. I can feel the difference. Give it a week until you make up your mind!

Daily Nootropic for Men

Store owner replied: So pumped to hear that, Aaron! Thank you for the great review!

Customer photo review of Daily Nootropic for Men

I'm 35 years old and would consider myself pretty knowledgable about supplementation, dieting, and biohacking, so trying Breadwinner was something I had to do. On a typical day, I take a host of vitamins and supplements, but on the day I received Breadwinner, I cut out all other supplements as well as coffee so I could get a true baseline of what the effects would be. Breadwinner lived up to the hype and then some. It kicked in after ~30 minutes, and lasted about 4 hours for me. It was an absolute gamechanger when it comes to getting into a true flow state. Clean, clear energy and focus - no jitters at all - just pure flow state. The feeling is very similar to what I experience with Methylene Blue, which has been my favorite supplement so far. The standout for me with breadwinner is the 1,000mg of lions mane. I was pretty shocked at how good this made me feel all on its own - its a blend of locked in, energized, and euphoric. I work a ridiculously stressful job and I love the ethos of this brand. As the provider for my family, its something I use to get shit done, and feel my absolute best, so I can show up for my family in the ways that they need.

Daily Nootropic for Men

Store owner replied: Such an EPIC testimonial and we are even more pumped that you got such great results with BW! Thank you Taner, a big discount has been applied to your next order.

Customer photo review of Daily Nootropic for Men

I think Breadwinner is freaking great. If I go empty stomach with black coffee and half a dose, I’m right where I need to be. The last 2 days I went back to my Celsius routine I was doing before and felt miserable. So I’m back on it today! They knocked it out of the park.

Daily Nootropic for Men

Store owner replied: Love that feedback, thank you for sharing! And we're pumped that you're getting good results with Breadwinner 🤝

Customer photo review of Daily Nootropic for Men

I started taking breadwinner at an interesting time in my life... I had my first child 2 months ago, I run a real estate business (not a cake walk in 2025, and because I am a masochist had signed up for my first 50 mile ultramarathon taking place on November 1st. My plate is full. I started taking BW with a goal of making my mornings as productive as possible. So far I have benefited greatly. I take first thing in the AM and give me about a 20% increase in productivity (specifically energy levels & creativity). I havent tried taking a second dose after lunch but will likely try that in the next few weeks.

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

"Breadwinner" over th past 80 days has definateky improved my heslth. More stamina, & clearer thinking. Looking forward to what the next 90 days bring.

Daily Nootropic for Men

Store owner replied: So glad you like the formula and that it has helped you!

Customer photo review of Daily Nootropic for Men

Breadwinner has a smooth not crazy energy throughout the day…I also notice myself functioning at a higher and longer mental state than normal….Ive also been able to push through some extremely tough workouts while on it that previously gave me problems….Im sticking with this product for the next several months and will report back..!

Daily Nootropic for Men

Store owner replied: Heck yeah! So glad that you like it and it’s making a difference for you. Keep crushing 👊

Customer photo review of Daily Nootropic for Men

I REALLY Like this ! I have tried everything there is out there, Finally Something that Works , Thank you ! I will buy again!

Daily Nootropic for Men

Store owner replied: Thank you so much for your kind words and for taking the time to let us know! We're pumped to hear it! If you ever need anything you know how to reach us.

Customer photo review of Daily Nootropic for Men

Breadwinner is giving me the edge I have been lacking since I had my first kid and am sleeping way less 😂. I’m an ex Alpha Brain user and recently decided to try Breadwinner after a friend recommended it. I feel like I’m back in the game!

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

Felt the difference on the first day. Just need to get some routines in order to really have it take affect.

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

Definitely helps no more afternoon naps and much better mood, thanks

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

Two weeks in, I’m getting more done and I feel like my old self again. I’m sharper in meetings, more present at home, and I finally have the energy to do more than just survive the day. It’s not a jolt or a high. It’s like my brain just works again. I’m not usually a supplement guy, but this one’s staying in the routine

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

The packaging was excellent! They really wanted you to have a great opening experience. Just got the product, but the ingredients are strong. I’ll update after I use the supplements for longer.

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

Just started taking "Breadwinner" and already noticing a big difference. Previously foggy days quickly turn into serious focus, productivity, and flow. I couldn't recommend it more.

Daily Nootropic for Men

Customer photo review of Daily Nootropic for Men

Been looking for a supplement like this for ages. I’ve tried so many others and the results have been mid (at best). Breadwinner is first I’ve actually felt the difference immediately. Love it, love it. Thank you!

Daily Nootropic for Men

I think it has helped with my energy but not sure it has really helped with my brain fog, or focus. Maybe slightly. But i have now been taking it for 90 days.

Daily Nootropic for Men

It helps at first but can make me feel a bit disconnected

Daily Nootropic for Men

I work 13 hour days with an hour drive both ways. Definitely feel it at the end of the day and in the morning when it’s sometimes hard to stay awake. I’m more clear and my mood stays much better

Daily Nootropic for Men

Absolutely love this product, no more brain fog and caffeine crashes

Daily Nootropic for Men

I was skeptical about this product at first but decided to give it a try after it was recommended to me by a friend. I am not a expert in nutrition or supplements, this is just my personal experience. I have been taking 4 a day for a couple of months and noticed some difference in the way I feel, but after I changed it to 6 a day is when I really noticed a difference. I dont crash at 2pm anymore and it gives me more energy into the evening where I would struggle to be present with my family after work. This isn't a miracle pill, you still have to prioritize healthy foods and a good sleep schedule. I found adding this supplement with trying to maintain a healthy life style is where I found the best results. Just a honest opinion from a father of two trying to survive the daily grind.

Daily Nootropic for Men

Good product, not a significant boost, but it’s there

Daily Nootropic for Men

Been very helpful on stretches of days off from Rx stimulant med. Seemingly allowing brain to "reset" and the couple of times ive taken Rx again i noticed a positive effect again from them.

Daily Nootropic for Men

Feel good, sharper, better, but not in an over the top way -- just the best version of me way. In South Dakota, ritalin user, this is good.

Daily Nootropic for Men

Just finished the first jar of the product. So far, "meh..." I have noticed no difference. I'm hoping it kicks in and starts making a difference going forward.

Daily Nootropic for Men

Best nootropic i have ever taken i use it everyday because of its power thank you

Daily Nootropic for Men

I am now a full 2.5 months into using Breadwinner. I already left a review after first couple of weeks but wanted to give a follow up. This stuff is so good! I started seeing positive results in a couple weeks but two months later I can honestly say this supplement has changed my life. My energy is through the roof. My Ohio gray/cold weather seasonal depression symptoms didn’t show up at all this year. I have crushed my sals goals at work and accomplished 3-4 times the house projects at home than prior to using breadwinner. This all while maintaining the busiest schedule I have ever had. Thank you for changing my life!

Daily Nootropic for Men

Store owner replied: Thank you so much for the kind words Emily, this is so epic to hear! This is exactly why we created this product - to drive real results and changes in peoples' lives like what you've described here. Thank you again, and just an FYI your next shipment is on us!

Breadwinner VS. The Rest

Breadwinner Other nootropics Energy drinks
8 science-
backed
ingredients
No No
Supports the
three Provider
Pillars
No No
Backed by
clinical studies
Varies No
Effective
dosages
Varies No
BioPerine® for
absorption
No No
3rd-party lab
tested for
potency
Rare No
90-day money
back guarantee
No No
Price $79+
/month
$4+
/day
Try Breadwinner Today

Try it for 90 days. More focus, or your money back.

Breadwinner Turns You
Into the Leader
Your
Family Deserves

Life-changing performance isn’t handed to you—it’s
earned. Breadwinner strengthens your focus, drive and
resilience over time,
creating an edge that gets sharper
with every passing day.

01 Activation

DAYS 1–7

The fog lifts. Your mind starts firing on all cylinders. Focus sharpens, motivation kicks in, and the brain fog starts to fade.

02 Momentum

DAYS 7-45

You're locked in. Distractions fade away, deep work comes naturally. You're thinking faster, making better decisions, and crushing stressful moments without breaking a sweat.

03 Optimization

DAYS 45-90

You're at your best from sunup to sundown. You stay sharp, energized, and in control—juggling work, family, and life like its second nature.

04 Mastery

DAY 90+

Welcome to your new normal. Unshakable focus, relentless drive, and the ability to lead under pressure without burning out. You're winning day after day, with no sign of slowing down.

Try Breadwinner Today

Try it for 90 days. More focus, or your money back.

Two Paths. One Decision.

The

Breadwinner Path

Respected. In Control. Unstoppable.

  • Your kids see a leader, not a ghost.
  • At work, you’re sharp, decisive, untouchable.
  • You win—because that’s what men like you do.
  • Wake up fired up and focused—ready to dominate.
  • Your wife looks at you with admiration, not disappointment.
The

Other Path

SLIPPING. Drifting. Invisible.

  • Snooze button. Another day wasted.
  • Your wife stops seeing you as a man.
  • Your kids don’t even notice you’re there.
  • At work, you’re slow, forgettable, replaceable.
  • Time flies by while you keep saying, “I’ll fix it… someday.”

One Decision. One Future.

Take the Breadwinner Path—or don’t. But know
this: the choice is yours. And so are the
consequences.

Try Breadwinner Today

Try it for 90 days. More focus, or your money back.

The Proof: Why
Breadwinner Works

When
Others Fall Short

Breadwinner is packed with clinically-backed ingredients proven to sharpen focus, fight fatigue, and
keep you performing at your peak, day in and day out.

Unlock a

300%

Boost in Focus in Just 2 Hours 1

Enhance Nutrient Absorption Up to 2

200%

Up to

86%

Longer Attention Span in 28 Days 3

20%

Reduction in Fatigue Under High Stress 4

10%

Boost in Attention Within 120 Minutes 1

Balanced

Beta-1

Brainwaves for Stress-Free Focus 5

HERE'S HOW TO BECOME A
Breadwinner today

LAST CHANCE:
SAVE 34% FOR LIFE

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Save 34% on All Orders

Free Shipping on All Orders

Ships in 1 Business Day

1 Bottle Delivered Monthly

120 Capsules, 30 Servings

TOTAL

$98

Save $39

$59

  • Refill ships in 30 days
  • Change or Cancel Anytime

Try Breadwinner risk-free for 90 days. If you’re not satisfied, we’ll will refund you, no questions asked. Reclaim your masculinity, risk-free.

You will receive a 30 day supply every 30 days. You can easily adjust or cancel at any time. By subscribing, you get discounted pricing and subscriber only benefits and gifts. One time purchase option also available below.

1 Month Supply
One Time Purchase
Save 34% on All Orders

Free Shipping on All Orders

TOTAL

$89

$74

  • 90 Day Guarantee
  • Ships in 1 Business Day

Got Questions?
We’ve Got
Answers

What is Breadwinner?

Breadwinner is a daily nootropic designed for men who lead, provide, and perform. It fuels motivation, focus, and mental endurance so you stay sharp and driven all day.

Is this harmful to take with medication?

Breadwinner is safe for most men, but if you're taking medication, consult your doctor before use.

Who is Breadwinner for?

It's for husbands, fathers, and providers—men who can't afford to burn out or fall behind.

How do I take Breadwinner?

Take 4 capsules each morning with food to fuel your focus, drive, and endurance all day.

How long until I see results?

Most men feel a difference in focus and energy within the first week. Full benefits build over 30-60 days.

How does this compare to energy drinks or coffee?

Breadwinner gives you smooth, crash-free focus without overstimulation, unlike energy drinks that rely on sugar and caffeine spikes.

Will Breadwinner improve my motivation and productivity?

Yes—it boosts dopamine and enhances focus, making it easier to stay driven, execute tasks, and power through long days.

Can Breadwinner help increase my energy?

Yes, but without the jitters or crashes. It fuels steady, all-day energy by supporting dopamine, mitochondrial function, and mental endurance.

Will Breadwinner improve my workouts or gym performance?

It's designed for mental endurance and focus, which can help you push through tough workouts, stay locked in, and recover mentally.

Do I need to cycle Breadwinner?

No. Breadwinner is safe for daily, long-term use with no need to cycle on and off.

Do I have to sign up for a subscription?

Yes, subscribers get 22% off every month, plus exclusive bonuses and early access to new products. You can easily cancel or modify your delivery schedule anytime.

What is your 90-day guarantee? Do you accept returns?

Yes. Try Breadwinner risk-free for 90 days. If you're not satisfied, we'll refund you—no questions asked.

Scientific References

  1. Nieratschker, R., Wüst, J. P., et al. "Acute Effects of Naturally Occurring Guayusa Tea and Nordic Lion's Mane Extracts on Cognitive Performance." Nutrients, 2023, 15(24), 5018. https://www.mdpi.com/2072-6643/15/24/5018
  2. Kesarwani, K., Gupta, R., and Mukerjee, A. "Bioavailability Enhancers of Herbal Origin: An Overview." Asian Pacific Journal of Tropical Biomedicine, 2013, 3(4), 253–266. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3634921/
  3. McGlade, E., Locatelli, A., Hardy, J., Kamiya, T., Morita, M., Morishita, K., Sugimura, Y., & Yurgelun-Todd, D. "Improved Attentional Performance Following CDP Choline Administration in Healthy Adult Women." Food and Nutrition Sciences, 2012, 3(6), 769–773. https://www.scirp.org/journal/PaperInformation?paperID=19921
  4. 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, Volume 7, Issue 5, October 2000, Pages 365–371. https://doi.org/10.1016/S0944-7113(00)80055-0
  5. Baumeister, J., Barthel, T., Geiss, K.R., & Weiss, M. "Influence of phosphatidylserine on cognitive performance and cortical activity after induced stress." Nutritional Neuroscience, Volume 11, Issue 3, 2008, Pages 103–110. https://doi.org/10.1179/147683008X301478
  6. Saitsu, Y., Nishide, A., Kikushima, K., Shimizu, K., & Ohnuki, K. "Improvement of cognitive functions by oral intake of Hericium erinaceus." Biomedical Research, 2019, 40(4), 125–131. https://pubmed.ncbi.nlm.nih.gov/31413233/
  7. Docherty, S., Doughty, F. L., & Smith, E. F. "The Acute and Chronic Effects of Lion's Mane Mushroom Supplementation on Cognitive Function, Stress and Mood in Young Adults: A Double-Blind, Parallel Groups, Pilot Study." Nutrients, 2023, 15(22), 4842. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10675414/
  8. Jongkees, B. J., Hommel, B., Kühn, S., & Colzato, L. S. "Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands—A review." Journal of Psychiatric Research, 2015, 70, 50–57. https://pubmed.ncbi.nlm.nih.gov/26424423/
  9. Examine.com Research Team. "L-Tyrosine – Evidence-Based Benefits, Dosage, and Side Effects." Examine, Updated 2024. https://examine.com/supplements/l-tyrosine/
  10. Sershen, H., Harsing, L. G. Jr., Banay-Schwartz, M., Hashim, A., Ramacci, M. T., & Lajtha, A. "Effect of acetyl-L-carnitine on the dopaminergic system in aging brain." Journal of Neuroscience Research, 1991, 30(3), 555–559. https://pubmed.ncbi.nlm.nih.gov/1839317/
  11. Veronese, N., Stubbs, B., Solmi, M., Ajnakina, O., Carvalho, A. F., & Maggi, S. "Acetyl-L-Carnitine Supplementation and the Treatment of Depressive Symptoms: A Systematic Review and Meta-Analysis." Psychosomatic Medicine, 2018, 80(2), 154–159. https://pubmed.ncbi.nlm.nih.gov/29076953/
  12. Bodis-Wollner, I., Chung, E., Ghilardi, M. F., Glover, A., Onofrj, M., Pasik, P., & Samson, Y. "Acetyl-levo-carnitine protects against MPTP-induced parkinsonism in primates." Journal of Neural Transmission - Parkinson's Disease and Dementia Section, Volume 3, 1991, Pages 63–72. https://link.springer.com/article/10.1007/BF02251137
  13. Tomassini, V., et al. "Comparison of the Effects of Acetyl L-Carnitine for the Treatment of Fatigue in Multiple Sclerosis: Results of a Pilot, Randomised, Double-Blind, Crossover Trial." Journal of Neurological Sciences, vol. 218, no. 1-2, 2004, pp. 103-108. https://pubmed.ncbi.nlm.nih.gov/14759641/
  14. Baumeister, J., et al. "Influence of phosphatidylserine on cognitive performance and cortical activity after induced stress." Nutritional Neuroscience, vol. 11, no. 3, 2008, pp. 103-110. https://doi.org/10.1179/147683008X301478
  15. Parker, A. G., et al. "The effects of IQPLUS Focus on cognitive function, mood and endocrine response before and following acute exercise." Journal of the International Society of Sports Nutrition, vol. 8, no. 16, 2011. https://doi.org/10.1186/1550-2783-8-16
  16. Shevtsov, V. A., et al. "A randomized trial of two different doses of a SHR-5 Rhodiola rosea extract versus placebo and control of capacity for mental work." Phytomedicine, vol. 10, no. 2-3, 2003, pp. 95-105. https://doi.org/10.1078/094471103321659780
  17. Spasov, A. A., et al. "A double-blind, placebo-controlled pilot study of the stimulating and adaptogenic effect of Rhodiola rosea SHR-5 extract on the fatigue of students caused by stress during an examination period with a repeated low-dose regimen." Phytomedicine, vol. 7, no. 2, 2000, pp. 85-89. https://doi.org/10.1016/S0944-7113(00)80078-1
  18. Sohail, A. A., et al. "The Cognitive-Enhancing Outcomes of Caffeine and L-theanine: A Systematic Review." Cureus, vol. 13, no. 12, 2021, e20828. https://doi.org/10.7759/cureus.20828
  19. Dodd, F. L., et al. "A double-blind, placebo-controlled study evaluating the effects of caffeine and L-theanine both alone and in combination on cerebral blood flow, cognition and mood." Psychopharmacology, vol. 232, no. 14, 2015, pp. 2563-2576. https://doi.org/10.1007/s00213-015-3895-0