Nootropic Stacks: Beginner Stacks With Evidence-Based Doses

ByJustin Updated on

A nootropic stack is a combination of two or more nootropics taken together for a shared goal, such as calm focus or memory. The best beginner stacks are small: two well-studied ingredients at doses used in human trials, introduced one at a time. Only one popular pairing, caffeine plus L-theanine, has actually been tested as a combination in multiple randomized trials; most other stacks combine ingredients that were studied separately.

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Key Takeaways

  • Caffeine plus L-theanine is the best-tested nootropic stack, with several controlled trials showing modest gains in attention and alertness.[1][2][3]
  • Other beginner stacks (citicoline + L-tyrosine, bacopa + phosphatidylserine, ashwagandha + magnesium) combine ingredients with separate evidence; the combinations themselves are largely untested.
  • Add one ingredient at a time and wait one to two weeks before adding the next, so you can identify benefits and side effects.
  • Avoid stacking multiple serotonergic ingredients with antidepressants, piling up stimulants, or taking very high choline doses.[4][14][15]
  • Simple, transparent stacks beat 15-ingredient formulas with untested combinations and under-dosed ingredients.

What Is A Nootropic Stack?

“Stacking nootropics” means combining compounds that are thought to work through different mechanisms, so their effects add up or one offsets another’s downside. The classic example is L-theanine smoothing out the jittery edge of caffeine. A stack can be a commercial product (like an all-in-one brain supplement) or a homemade nootropic stack you assemble from single ingredients.

The idea is reasonable, but it has a weak spot: most combinations have never been studied together. When you stack, you are relying on each ingredient’s own evidence plus your own careful observation. If you are new to the topic, start with what nootropics are and which single ingredients have the best evidence.

Beginner Nootropic Stacks At A Glance

Stack Goal Starting Doses Tested As A Combination?
Caffeine + L-theanine Calm focus, alertness 50 to 100 mg caffeine + 100 to 200 mg L-theanine Yes, several small trials
Citicoline + L-tyrosine Focus under demand 250 mg citicoline daily; L-tyrosine only before demanding days No
Bacopa + phosphatidylserine Memory About 300 mg bacopa + 100 to 300 mg phosphatidylserine daily No
Ashwagandha + magnesium Stress and sleep About 300 mg ashwagandha twice daily + a moderate magnesium dose in the evening No

Stack 1: Caffeine And L-Theanine For Calm Focus

This is the most popular and best-supported nootropic stack. Caffeine increases alertness; L-theanine, an amino acid from tea, may take the edge off caffeine’s jitteriness.

What the research shows:

  • In a crossover trial, 50 mg caffeine plus 100 mg L-theanine improved speed and accuracy on an attention-switching task and reduced distraction compared with placebo.[1]
  • A trial using 150 mg caffeine with 250 mg L-theanine found improvements in some measures of speed, accuracy and alertness.[2]
  • A lower dose, 97 mg L-theanine with 40 mg caffeine, improved task-switching accuracy and alertness and reduced self-rated tiredness.[3]

How to take it: Start with 100 mg L-theanine alongside your usual cup of coffee (about 80 to 100 mg caffeine). Many people settle on a 1:1 or 2:1 ratio of L-theanine to caffeine. Keep total daily caffeine at or below about 400 mg, the amount the FDA says is generally not associated with negative effects in healthy adults, and lower if you are sensitive.[4] Avoid caffeine late in the day.

Evidence strength: Moderate. Effects are modest and short-lived (hours). Our L-theanine and caffeine guide covers ratios and timing, and Suntheanine vs L-theanine explains the branded form.

Check Nootropics Depot L-Theanine

Stack 2: Citicoline And L-Tyrosine For Focus

This stack pairs a choline source with a dopamine and norepinephrine precursor. It is popular as a stimulant-free “focus stack,” but no trial has tested the two together.

  • Citicoline: In a 28-day randomized trial in 75 healthy adolescent males, 250 mg or 500 mg a day improved attention and psychomotor speed compared with placebo.[5] Evidence is limited and comes largely from one branded form (Cognizin).
  • L-tyrosine: A review concluded that tyrosine may help preserve cognitive performance during short-term stress or high cognitive demand, likely by replenishing neurotransmitters that are being depleted. It does not appear to boost performance when you are not under strain.[6]

How to take it: Take citicoline (250 mg) in the morning daily. Use L-tyrosine situationally, before a demanding day, rather than every day; the benefits seen in research were during short-term stressful or cognitively demanding situations.[6] Start low (500 mg), since effects at commonly sold doses have not been well studied. Comparing tyrosine forms? See NALT vs L-tyrosine.

Who should skip it: People taking MAO inhibitors, thyroid medication or stimulant medication should talk with their prescriber first, since tyrosine is a building block for catecholamines and thyroid hormones.

Evidence strength: Limited for each ingredient; untested as a combination.

Check Nootropics Depot Citicoline Check Nootropics Depot L-Tyrosine

Stack 3: Bacopa And Phosphatidylserine For Memory

This is a slow-building memory stack. Both ingredients have human trials on memory, but on their own, not together.

  • Bacopa monnieri: A meta-analysis of nine randomized trials (518 participants), each lasting at least 12 weeks, found improvements in some measures of attention and processing speed.[7] In a 12-week trial in 54 adults aged 65 and older, 300 mg a day of a standardized extract improved delayed word recall.[8]
  • Phosphatidylserine: In a six-month Japanese trial of 78 adults aged 50 to 69 with mild cognitive impairment, test scores rose in all groups, including placebo. Among people who started with relatively low memory scores, however, 100 mg or 300 mg a day of soy-derived phosphatidylserine improved memory from baseline while the placebo group stayed unchanged.[9]

How to take it: Start bacopa first, about 300 mg a day of a standardized extract with food, because stomach upset is its most common side effect. After two weeks, add phosphatidylserine at 100 mg and increase to 300 mg if you tolerate it. Judge the stack after about 12 weeks, not days.[7] For the difference between PS and PC, see phosphatidylserine vs phosphatidylcholine, and for more options, our best supplements for memory.

Evidence strength: Moderate for bacopa, limited for phosphatidylserine (mostly older adults).

Check Nootropics Depot Bacopa Check Nootropics Depot Phosphatidylserine

Stack 4: Ashwagandha And Magnesium For Stress And Sleep

Stress and poor sleep undermine focus more than any supplement can fix. This evening-leaning stack targets both.

  • Ashwagandha: In a 60-day trial of 64 stressed adults, 300 mg of root extract twice daily lowered stress scores and cortisol versus placebo.[10] In a 10-week trial of 60 people with insomnia, the same dose shortened sleep onset and improved sleep efficiency and sleep quality compared with placebo.[11]
  • Magnesium: In an eight-week trial in 46 older adults with insomnia, 500 mg of magnesium a day improved insomnia severity scores, sleep onset and sleep efficiency compared with placebo.[12] For a form studied specifically for cognition, see magnesium L-threonate.

How to take it: Start magnesium first at a moderate dose in the evening, then add ashwagandha after one to two weeks. Talk with your doctor before using higher magnesium doses, especially if you have kidney disease. Ashwagandha has rare reports of liver injury; stop it and seek care if you notice dark urine, yellowing skin or eyes, or persistent itching.[13] Avoid ashwagandha during pregnancy and check with your doctor if you have a thyroid or autoimmune condition. Compare adaptogens in ashwagandha vs rhodiola.

Evidence strength: Limited to moderate for ashwagandha; limited for magnesium in people without deficiency.

Check Nootropics Depot Ashwagandha Check Nootropics Depot Magnesium

How To Build A Homemade Nootropic Stack Safely

  1. Pick one goal. A focus stack and a sleep stack pull in different directions.
  2. Start with one ingredient. Use a dose from human trials. Note how you feel, how you sleep and any side effects for one to two weeks.
  3. Add the second ingredient. Only if the first is tolerated. Change one variable at a time.
  4. Keep the stack small. Two or three ingredients are plenty. Each addition multiplies the chance of side effects and interactions.
  5. Respect time frames. Caffeine and L-theanine act in under an hour; bacopa needs weeks.[1][7]
  6. Cycle off occasionally. A week off every couple of months helps you check whether a stack is still doing anything.
  7. Check with a pharmacist. Bring the full list, including doses, if you take any medication.

How To Tell If Your Stack Is Working

Because effects are usually subtle, a little structure helps you avoid fooling yourself:

  • Write down a baseline. Before you start, rate focus, mood, energy and sleep from 1 to 10 each day for a week.
  • Track the same things after each change. Note the time you took each ingredient and anything unusual, such as headaches, stomach upset or poor sleep.
  • Use an objective measure if you can. A free online reaction-time or working-memory test taken at the same time of day is less biased than “I feel sharper.”
  • Look for a difference when you stop. If nothing changes during a week off, the ingredient may not be doing much for you.

If a stack produces side effects you can’t explain, stop the most recently added ingredient first.

Stacking Cautions: Combinations To Avoid

Serotonergic Stacking

Some supplements affect serotonin, including St. John’s wort, 5-HTP and possibly saffron. Combining them with each other or with antidepressants (SSRIs, SNRIs, MAOIs) or certain migraine and pain medicines can raise the risk of serotonin syndrome, a potentially dangerous reaction. St. John’s wort in particular is known to interact with antidepressants and many other drugs.[15] If you take any serotonergic medication, do not add these supplements without your prescriber’s approval. See our saffron page for details.

Cholinergic Overload

Stacking several choline sources (citicoline, alpha-GPC, choline bitartrate) on top of a choline-rich diet can push intake higher than needed. The tolerable upper intake level for choline in adults is 3,500 mg a day; very high intakes can cause a fishy body odor, sweating, vomiting and low blood pressure.[14] Users also commonly report headaches with excess choline. Combining choline sources with acetylcholinesterase inhibitors such as huperzine A amplifies cholinergic effects in theory; huperzine A is a drug-like compound that should be discussed with a doctor.

Stimulant Stacking

Caffeine is in coffee, tea, pre-workouts, energy drinks and many “focus” supplements. Stacking them can push you well past 400 mg a day and cause trouble sleeping, nervousness, a rapid heart rate and shakiness.[4] Never combine caffeine-heavy stacks with prescription stimulants without asking your prescriber.

Sedative Stacking

Calming ingredients (ashwagandha, magnesium, L-theanine at higher doses) can add to the effects of sleep medications, alcohol or anxiety medications. Be cautious if you take any of these.

What About Popular Named Stacks?

The “Mr. Happy” Stack

This online stack combines uridine, an omega-3 source and a choline source, aiming at mood and brain cell membranes. It is based on animal research and reasoning about mechanisms; the combination has not been tested in published human trials for mood or cognition.

The Stamets Stack

Proposed by mycologist Paul Stamets, it combines lion’s mane, niacin and microdoses of psilocybin. Psilocybin is a Schedule I controlled substance under US federal law, and we do not recommend this stack. Lion’s mane on its own has one small human trial in older adults with mild cognitive impairment and a lot of animal research.

Commercial “All-In-One” Stacks

If you would rather not build a stack yourself, a transparent all-in-one formula is the simplest route. Watch for proprietary blends and doses far below studied amounts.

Mind Lab Pro: A Pre-Built Daily Stack

Mind Lab Pro includes 250 mg citicoline, 100 mg L-theanine, 100 mg phosphatidylserine, 175 mg N-acetyl L-tyrosine, 150 mg bacopa and more, with every dose disclosed and no caffeine, so it pairs easily with coffee. It is a broad, well-tolerated stack, but bacopa (150 mg vs about 300 mg in studies), rhodiola (50 mg vs 400 to 600 mg) and phosphatidylserine (100 mg vs up to 300 mg) are below many studied doses. For a study-matched dose of one ingredient, add a standalone product. Read our Mind Lab Pro review.

Check Mind Lab Pro Price

Nootropic Stack FAQs

What Is The Best Nootropic Stack For Beginners?

Caffeine plus L-theanine. It is inexpensive, widely available and the only common stack with several controlled trials as a combination.[1][2][3]

What Is A Good Nootropic Stack For Focus?

Start with caffeine plus L-theanine. If you want a stimulant-free option, citicoline daily with situational L-tyrosine is a reasonable experiment, though untested as a pair.[5][6] See also best supplements for focus.

What Is A Good Nootropic Stack For Memory?

Bacopa plus phosphatidylserine, taken daily for at least 12 weeks.[7][9]

Is There A Nootropic Stack For ADHD?

Supplements are not a substitute for diagnosed ADHD treatment, and several common stack ingredients (caffeine, L-tyrosine) can interact with stimulant medication. Read our ADHD evidence review and talk with your prescriber.

How Many Nootropics Should I Stack?

Two or three at most, added one at a time. Larger stacks make it impossible to know what is working and increase the risk of side effects.

Can I Take Nootropic Stacks Every Day?

Ingredients like bacopa, citicoline and creatine were studied with daily use. Situational ingredients like L-tyrosine and caffeine are better used when needed. Our nootropic side effects guide covers long-term use.

Medical disclaimer: This article is for educational purposes only and is not medical advice. Dietary supplements are not evaluated by the FDA to diagnose, treat, cure or prevent any disease. Talk with your doctor or pharmacist before starting a supplement, especially if you are pregnant, nursing, take prescription medication or have a medical condition. Read our full medical disclaimer.

References

  1. Owen GN, Parnell H, De Bruin EA, Rycroft JA. The combined effects of L-theanine and caffeine on cognitive performance and mood. Nutritional Neuroscience. 2008;11(4):193-198. PubMed
  2. Haskell CF, et al.. The effects of L-theanine, caffeine and their combination on cognition and mood. Biological Psychology. 2008;77(2):113-122. PubMed
  3. Giesbrecht T, et al.. The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness. Nutritional Neuroscience. 2010;13(6):283-290. PubMed
  4. U.S. Food and Drug Administration. Spilling the Beans: How Much Caffeine Is Too Much? FDA
  5. McGlade E, et al.. The Effect of Citicoline Supplementation on Motor Speed and Attention in Adolescent Males. Journal of Attention Disorders. 2019;23(2):121-134. DOI
  6. Jongkees BJ, et al.. Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands: A review. Journal of Psychiatric Research. 2015;70:50-57. PubMed
  7. Kongkeaw C, et al.. Meta-analysis of randomized controlled trials on cognitive effects of Bacopa monnieri extract. Journal of Ethnopharmacology. 2014;151(1):528-535. PubMed
  8. Calabrese C, et al.. Effects of a standardized Bacopa monnieri extract on cognitive performance, anxiety, and depression in the elderly: a randomized, double-blind, placebo-controlled trial. Journal of Alternative and Complementary Medicine. 2008;14(6):707-713. PubMed
  9. Kato-Kataoka A, et al.. Soybean-derived phosphatidylserine improves memory function of the elderly Japanese subjects with memory complaints. Journal of Clinical Biochemistry and Nutrition. 2010;47(3):246-255. PMC
  10. Chandrasekhar K, et al.. A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults. Indian Journal of Psychological Medicine. 2012;34(3):255-262. PubMed
  11. Langade D, et al.. Efficacy and Safety of Ashwagandha (Withania somnifera) Root Extract in Insomnia and Anxiety: A Double-blind, Randomized, Placebo-controlled Study. Cureus. 2019;11(9):e5797. PubMed
  12. Abbasi B, et al.. The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. Journal of Research in Medical Sciences. 2012;17(12):1161-1169. PubMed
  13. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. Ashwagandha. National Institute of Diabetes and Digestive and Kidney Diseases. NCBI Bookshelf
  14. National Institutes of Health, et al.. Choline: Fact Sheet for Consumers. NIH ODS
  15. Mayo Clinic. St. John’s wort. Mayo Clinic

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