Our Performance Lab Sleep review applies our published six-criteria methodology to the formula and its evidence. The product is a premium capsule-based formula built around one key differentiator: tart cherry extract as a natural melatonin source rather than synthetic melatonin, paired with magnesium bisglycinate for sleep depth.
The formula is low-additive — no fillers, no artificial colors, no synthetic additives. Everything comes in plant-based NutriCaps capsules. Here is our full breakdown.
- Tart cherry extract provides natural melatonin — gentler than synthetic
- Magnesium bisglycinate supports deeper, restorative sleep stages
- Low-additive formula — zero synthetic additives or fillers
- Best capsule-based sleep supplement in our Sleep silo ranking
- Available only direct from Performance Lab — no Amazon
Performance Lab Sleep earns its place as our #2 overall sleep pick. The tart cherry melatonin approach is genuinely innovative, the formula is the cleanest we have reviewed, and the magnesium bisglycinate delivers noticeable improvements in sleep depth. Highly recommended for users who want a capsule format with no synthetic ingredients.
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Our Performance Lab Sleep Review
Performance Lab has built a reputation for low-additive supplement formulations across its entire product line. Sleep is no exception. The standout ingredient is Montmorency tart cherry extract — a natural source of melatonin and anthocyanins that supports sleep onset without the grogginess sometimes associated with synthetic melatonin supplements.
Performance Lab Sleep is best suited to users dealing with both sleep onset and sleep quality issues. The magnesium bisglycinate component was particularly noticeable — deeper sleep, fewer nighttime awakenings, and better morning recovery compared to melatonin-only products.
How Performance Lab Sleep Compares
| Product | Score | Key Features |
|---|---|---|
| MoonBrew | 9.1 | Reishi + Ashwagandha, melatonin-free drink |
| Performance Lab Sleep ★ | 8.9 | Tart cherry melatonin, low-additive caps |
| Nested Naturals LUNA | 8.7 | Herbal blend, vegan, budget-friendly |
| Natrol Sleep & Restore | 8.0 | Melatonin + Magnesium, drugstore pick |
- Tart cherry melatonin — natural and gentle
- Low-additive formula — zero synthetic additives
- Magnesium bisglycinate improves sleep depth
- NutriGenesis magnesium — enhanced bioavailability
- Vegan-friendly plant capsules
- Premium price point
- Only available direct from manufacturer
- Takes 1–2 weeks to feel full effects
Final Verdict
Performance Lab Sleep is our top-scoring capsule-based sleep supplement. The tart cherry melatonin approach, low-additive formulation, and meaningful magnesium dose make it a standout product in a crowded category.
If you prefer a drink format or want a completely melatonin-free option, MoonBrew remains our overall #1. But for a clean, effective capsule supplement, Performance Lab Sleep is a strong fit at its tier.
Check Best Price for Performance Lab Sleep →How Performance Lab Sleep Works
Montmorency tart cherry is one of the richest natural food sources of melatonin. Unlike synthetic melatonin, tart cherry delivers melatonin alongside anthocyanins and other phytonutrients that may enhance its sleep-supporting effects. The result is a gentler, more natural sleep onset signal.
Magnesium bisglycinate supports the production of GABA — the primary inhibitory neurotransmitter responsible for calming neural activity and preparing the brain for sleep. The bisglycinate form is chelated to glycine, improving absorption and reducing the digestive issues sometimes associated with other magnesium forms.
The U.S. National Center for Complementary and Integrative Health notes that non-pharmacological approaches to sleep can be effective for many adults, particularly when targeting both sleep onset (via melatonin signaling) and sleep depth (via magnesium-supported GABA). Our Performance Lab Sleep review found this dual-action approach the meaningful differentiator over melatonin-only competitors.
Does Performance Lab Sleep contain synthetic melatonin?
No. Performance Lab Sleep uses Montmorency tart cherry extract as a natural melatonin source rather than synthetic melatonin. This makes it a gentler option for melatonin-sensitive users — and is one of the key reasons our Performance Lab Sleep review ranks it as the best capsule-based pick in the Sleep silo.
Where can I buy Performance Lab Sleep?
Performance Lab Sleep is only available directly from the manufacturer at performancelab.com. It is not sold on Amazon or in retail stores. This direct-to-consumer model lets Performance Lab maintain tighter quality control but means stock can occasionally fluctuate around new product launches.
How long does it take to work?
Most users notice improvements in sleep onset within the first few nights. The full benefits — particularly improved sleep depth from magnesium bisglycinate — typically build over 1–2 weeks of consistent nightly use.
Is Performance Lab Sleep vegan?
Yes. The formula uses plant-based NutriCaps capsules and contains no animal-derived ingredients. Vegan-friendly capsules combined with the low-additive ingredient list make Performance Lab Sleep one of the few capsule sleep supplements suitable for strict plant-based diets.
Sources
- National Institutes of Health, National Center for Complementary and Integrative Health — Sleep Disorders: In Depth.
- Howatson G. et al. (2012). Effect of tart cherry juice (Prunus cerasus) on melatonin levels and enhanced sleep quality. European Journal of Nutrition — clinical evidence for Montmorency tart cherry sleep effects.
- Pigeon W.R. et al. (2010). Effects of a tart cherry juice beverage on the sleep of older adults with insomnia: a pilot study. Journal of Medicinal Food — tart cherry sleep quality trial in older adults.
- Boyle N.B. et al. (2017). The Effects of Magnesium Supplementation on Subjective Anxiety and Stress — A Systematic Review. Nutrients — magnesium supplementation evidence base.
- Examine.com — Tart cherry reference page.
Related comparisons
Not sure what to look for? Read our How to Choose a Sleep Supplement guide.