Performance Lab Sleep Review (2026): Clean Label, Modest Doses
Quick answer: Performance Lab Sleep is a melatonin-free capsule made by Performance Lab. A two-capsule serving contains 100mg magnesium (bisglycinate and taurate), 500mg CherryPURE Montmorency tart cherry, 200mg L-tryptophan and 200mg lemon balm, and every dose is disclosed. It is a clean, gentle formula, but the doses are modest: the tryptophan is well under the 1 gram where the research found an effect, and tart cherry and magnesium have limited sleep evidence. At the time of writing it costs $44 for a month, or $39.60 on subscription. The 30-day guarantee comes with strict conditions: first order only, one container, used until empty, and shipping deducted. If you specifically want to avoid melatonin, it is a well-documented choice. If falling asleep is your main problem, expect a subtle effect.
Performance Lab has built a following among people who read labels, and “Performance Lab Sleep review” is searched mostly by people who want to know whether a melatonin-free formula can actually work. The pages that come up tend to be nootropic and affiliate blogs that are fairly uncritical. This page checks the four ingredients against the research, gives you the real price and the fine print on the guarantee, and says plainly where it is a better buy than the product we recommend. We have not tested this product ourselves; everything below is drawn from Performance Lab’s published label and policies and the sources linked in the text.
What Performance Lab Sleep is, and who makes it
Performance Lab Sleep is sold by Performance Lab USA Corp, which lists an address in Winter Park, Florida on its product page. The brand sells a range of “clean label” supplements. Its capsules are made from pullulan (branded NutriCaps), with a rice concentrate as the only other listed ingredient.
The defining design choice is what is left out. There is no melatonin. The formula tries to support your own melatonin and serotonin production through tart cherry (which naturally contains small amounts of melatonin) and tryptophan (a building block for serotonin and melatonin), with magnesium and lemon balm for relaxation.
The full formula, with doses
From the Supplement Facts on Performance Lab’s Sleep page at the time of writing. The serving is 2 capsules, with 30 servings per container.
| Ingredient | Per 2 capsules | Evidence at this dose |
|---|---|---|
| Magnesium (bisglycinate, taurate, NutriGenesis®) | 100mg (24% DV) | Weak |
| CherryPURE® Montmorency tart cherry (50:1) | 500mg | Weak to moderate |
| L-Tryptophan | 200mg | Moderate overall; weak at this dose |
| Lemon balm extract | 200mg | Weak |
Four ingredients, all fully disclosed, with named and well-absorbed forms of magnesium. On transparency and formulation quality, this is one of the tidier labels in the sleep aisle. The open question is dose.
Ingredient by ingredient: what the research supports
Magnesium, 100mg: gentle form, weak sleep evidence
Bisglycinate and taurate are gentle, well-absorbed forms, a real step up from the cheap magnesium oxide in many formulas. The sleep evidence is the limiting factor. A 2021 systematic review of magnesium for insomnia in older adults rated the evidence as low quality, with small and uncertain effects on how long it takes to fall asleep. At 100mg (24% of the daily value), this is a top-up rather than a high dose. It is most likely to help if your diet is low in magnesium.
Montmorency tart cherry, 500mg: interesting, but mostly studied as juice
Tart cherries contain small amounts of natural melatonin. In a 2012 randomised trial in the European Journal of Nutrition, tart cherry juice concentrate raised melatonin levels and modestly improved sleep time and efficiency in healthy adults over a week. That is encouraging but small, and most of the research uses juice rather than a powdered extract in a capsule, so it does not transfer directly to 500mg of powder. We would call it weak to moderate evidence: plausible, not proven.
L-Tryptophan, 200mg: right idea, low dose
Tryptophan is the amino acid the body uses to make serotonin and then melatonin. A 2022 meta-analysis in Nutrition Reviews found that tryptophan supplementation reduced time awake after falling asleep, with the benefit seen at 1 gram or more. Performance Lab Sleep provides a fifth of that. It is also a serotonin precursor, which matters if you take antidepressants (see the safety section).
Lemon balm, 200mg: weak
Lemon balm is a traditional calming herb. Its sleep evidence comes mostly from small studies, such as a 2011 open-label pilot in people with mild-to-moderate anxiety and sleep disturbances, which had no placebo group. It is plausible, but not something to rely on.
Our read on the formula: Performance Lab Sleep is well made, but it is a gentle nudge rather than a sleep aid in the sense most buyers mean. Without melatonin, the ingredient with the strongest evidence for getting to sleep is missing, and the tryptophan is dosed below the level linked to benefit. People whose sleep is mostly “wired and tense” and who are low in magnesium are the likeliest to notice something. People who lie awake for an hour are likely to be underwhelmed.
Price and guarantee, at the time of writing
Performance Lab’s Sleep page listed:
- One-time purchase: $44.00 for 30 servings
- Monthly subscription: $39.60 (10% off)
- 4-month subscription: $132.00 for four bottles (25% off), which is $33 a month
The money-back guarantee is described as a 30-day “put it to the test” offer, and the conditions are stricter than the headline suggests:
- First orders only, and a maximum of one container per product.
- You are asked to take the supplement as directed until the container is empty before requesting a refund. Opening extra containers of the same product does not make them refundable.
- You must email customer service with your name, address and order number within 60 days of delivery.
- Refunds are paid minus shipping costs.
In practice, you can get your money back on one bottle if it does nothing for you, but not on a multi-month subscription bundle. If you want to test it, buy one bottle, not the four-month pack.
Complaints and red flags
We did not find an FDA warning letter, FTC action or class action involving Performance Lab Sleep. The public complaint record is thin. Performance Lab’s Trustpilot profile had only 14 reviews when we checked, which is too few to draw conclusions from. The negative ones there concern an order that shipped after it was cancelled, the refund policy deducting shipping costs, and slow replies to emails. None of these suggests a problem with the product. They are worth knowing mainly because they match the guarantee terms above: read them before you order.
Who it suits, and who should skip it
Good fit if you…
- Want to avoid melatonin completely
- Care about clean, fully disclosed labels
- Suspect your diet is low in magnesium
- Want a gentle nightly routine product rather than a sleep aid
Skip it if you…
- Take an SSRI, SNRI, MAOI, triptan or tramadol (the L-tryptophan)
- Mainly struggle to fall asleep and want a noticeable effect
- Want to buy several months at once with a refund safety net
- Are pregnant or breastfeeding (ask your doctor)
Safety notes. L-tryptophan is a serotonin precursor, so combining it with serotonergic medicines raises the risk of serotonin syndrome. Talk to your prescriber first if you take antidepressants, triptans or tramadol. According to the NIH’s magnesium fact sheet, magnesium supplements can affect how some antibiotics and osteoporosis drugs are absorbed, so space them apart if you take those, and ask a pharmacist if you have kidney disease. Persistent insomnia, loud snoring or pauses in breathing at night are reasons to see a doctor rather than try another supplement.
What we’d look at instead, and when we wouldn’t
This is the closest comparison of the three competitor reviews on this site, because YU Sleep shares three of Performance Lab Sleep’s ideas: tart cherry, magnesium and lemon balm, plus a serotonin precursor. YU Sleep is a liquid taken under the tongue. Its formula is red tart cherry, 5-HTP, vitamins B6 and B2, magnesium glycinate, apigenin, lemon balm, L-theanine, GABA and melatonin at 0.9mg. We explain why it is the one we recommend first in why we recommend it first.
Where Performance Lab Sleep is the better buy:
- You do not want melatonin at all. Performance Lab Sleep has none, and YU Sleep does.
- Transparency. Every Performance Lab dose is on the label. YU Sleep only discloses its melatonin dose.
- Cost to try. $44 gets you one month of Performance Lab. YU Sleep has no single bottle. At the time of writing it is $138 for two months, $177 for three, or $294 for six.
Where YU Sleep is the fairer test:
- Getting to sleep is your main problem. YU Sleep includes a low 0.9mg dose of melatonin, the best-evidenced ingredient for falling asleep, plus L-theanine, apigenin and GABA for a racing mind. Performance Lab has none of these.
- The guarantee. YU Sleep’s 60-day money-back guarantee gives you twice as long to judge it. Performance Lab’s refund covers one container on a first order, minus shipping.
- Cost per month on the pack we would pick. About $59 a month on YU Sleep’s three-month pack against $44 for Performance Lab. It is more, but not dramatically so for a broader formula.
What does not change between them: both contain a serotonin precursor. Tryptophan in Performance Lab and 5-HTP in YU Sleep both call for the same conversation with your doctor if you take antidepressants.
Need help actually falling asleep?
YU Sleep: tart cherry, magnesium and lemon balm plus 0.9mg melatonin and L-theanine, in a sublingual liquid, with a 60-day money-back guarantee. $138 for two months, $177 for three, $294 for six. The pricing block is about two-thirds of the way down a long sales page.
See today’s price — from $138 →Prices at the time of writing, set by the seller and subject to change.
Frequently asked questions
Does Performance Lab Sleep contain melatonin?
No. It contains magnesium, Montmorency tart cherry (which naturally contains small amounts of melatonin), L-tryptophan and lemon balm. There is no added melatonin.
Does Performance Lab Sleep work?
Its ingredients are well chosen and fully disclosed, but the doses are modest and the evidence for each one is weak to moderate. Expect a subtle effect on relaxation and sleep quality rather than noticeably faster sleep onset, especially if you are used to melatonin.
How much does Performance Lab Sleep cost?
At the time of writing, $44 for a one-time purchase of 30 servings, $39.60 on a monthly subscription, or $132 for a four-bottle subscription. Prices can change.
What is the Performance Lab money-back guarantee?
A 30-day guarantee that applies to first orders only and to one container per product. You are asked to use the product as directed until the container is empty, email customer service within 60 days of delivery, and the refund is paid minus shipping costs.
Can I take Performance Lab Sleep with antidepressants?
Ask your prescriber first. It contains L-tryptophan, a serotonin precursor, and combining that with SSRIs, SNRIs, MAOIs, triptans or tramadol raises the risk of serotonin syndrome. The same applies to YU Sleep, which contains 5-HTP.
Disclosure: Sleep Align is reader-supported. The YU Sleep link above is an affiliate link, so we may earn a commission if you buy through it, at no extra cost to you. We have no affiliate relationship with Performance Lab. We have not tested this product ourselves; this review is based on the manufacturer’s published label and policies and the sources linked above. Prices and terms are as published at the time of writing and can change. This is general information, not medical advice.