It separates the reviewed label and checkout record from seller positioning and ingredient-level research. Because most of the formula is contained in a 637 mg proprietary blend, research using disclosed ingredient doses is not treated as proof of the finished YU Sleep liquid.
Verified product snapshot
The reviewed bottle provides approximately 30 servings.
Melatonin is listed separately from the proprietary botanical and amino-acid blend.
Seven included ingredients share one total, so individual amounts are not disclosed.
The reviewed offer showed a one-time purchase rather than an autoship enrollment.
Product materials reviewed
Formula facts from the reviewed label
| Declared component | Amount | What the label supports | Important boundary |
|---|---|---|---|
| Vitamin B2 | 0.5 mg | Presence and quantity in one serving. | The label does not establish a sleep outcome from this amount. |
| Vitamin B6 | 0.5 mg | Presence and quantity in one serving. | The label does not establish a sleep outcome from this amount. |
| Melatonin | 0.9 mg | A separately disclosed melatonin dose in one serving. | The panel does not establish that the melatonin is sourced from tart cherry. |
| Proprietary blend | 637 mg total | Red tart cherry, magnesium glycinate, apigenin, lemon balm, 5-HTP, L-theanine and GABA are included. | The amount of each ingredient is unknown, preventing direct dose comparison with research. |
| Directions | 2 full droppers | Use approximately 30 minutes before bed, subject to the current bottle directions. | The product label should control over simplified promotional instructions. |
Offer and checkout record
$138 product total plus shipping in the reviewed checkout.
$177 product total with free shipping and the displayed digital bonuses.
$294 product total with free shipping and the displayed digital bonuses.
No recurring autoship enrollment was displayed in the checkout reviewed for this dossier.
The seller funnel reviewed for this dossier is accessed through an affiliate link. Pro Review Metric may earn a commission if a qualifying purchase is completed, at no additional cost to the buyer.
Open the current YU Sleep offerSource map
YU Sleep Supplement Facts panel
Supports: serving size, vitamins B2 and B6, 0.9 mg melatonin, proprietary-blend total and the listed blend ingredients.
Does not prove: clinical effectiveness, individual blend doses or the biological source of the separately listed melatonin.
View the label imageCurrent seller funnel and ClickBank checkout
Supports: current package totals, visible shipping, bonuses, one-time billing presentation and the displayed 60-day money-back period.
Does not prove: product effectiveness or that prices, shipping and terms will remain unchanged.
Open the current offerYU Sleep official product page
Supports: how the seller positions the product, its liquid routine, intended sleep-support use and current marketing narrative.
Important limit: promotional statements are not independent clinical evidence. Where promotional ingredient descriptions conflict with the reviewed panel, the Supplement Facts label controls our factual description.
View the official product pageClickBank customer refund instructions
Supports: the general process for finding a ClickBank order and submitting a refund request.
Does not prove: the product-specific refund period, which must be confirmed in the current YU Sleep transaction terms.
Read ClickBank refund instructionsNCCIH guidance on melatonin and sleep supplements
Supports: melatonin helps regulate circadian timing; evidence varies by sleep problem; short-term use appears relatively safe for many adults, while long-term safety and product consistency remain concerns.
Important limits: the guidance does not evaluate YU Sleep. It also advises people taking medicines—particularly blood thinners or epilepsy medicines—to consult a health professional.
Read NCCIH melatonin guidanceTart cherry juice crossover study in healthy adults
Supports: tart cherry juice concentrate has been examined in a randomized crossover study measuring melatonin metabolites and sleep outcomes.
Important limits: the study used tart cherry juice concentrate in 20 adults, not the undisclosed tart-cherry amount inside YU Sleep’s proprietary blend.
View the PubMed recordTart cherry pilot study in older adults with insomnia
Supports: tart cherry juice has been examined in a small placebo-controlled crossover pilot involving older adults with insomnia.
Important limits: only eight participants completed the study, the intervention was 480 mL of juice daily, and the result cannot be transferred to a small undisclosed amount in a multi-ingredient liquid.
View the PubMed recordL-theanine and lemon-balm combination trial
Supports: a formulation containing L-theanine, lemon balm, valerian and saffron was tested in a randomized placebo-controlled trial in adults with impaired sleep.
Important limits: the active formulation did not significantly outperform placebo on the reported objective or questionnaire outcomes, and it was not the YU Sleep formula.
View the PubMed recordMagnesium bisglycinate randomized trial
Supports: 250 mg of elemental magnesium delivered as magnesium bisglycinate was studied for four weeks in 155 adults reporting poor sleep and produced a modest improvement in insomnia-severity scores.
Important limits: YU Sleep does not disclose its elemental-magnesium amount, so the study dose cannot be compared directly with the product.
View the PubMed recordCombined GABA and L-theanine study
Supports: a 2026 exploratory study examined 700 mg GABA plus 200 mg L-theanine daily in adults with sleep problems.
Important limits: the study was single-arm, included 19 participants and used disclosed doses that cannot be compared with YU Sleep’s proprietary blend.
View the PubMed recordNo finished-product clinical trial was identified in the source set reviewed
The available evidence concerns the label, current checkout, seller claims and research on individual ingredients or other ingredient combinations. It does not establish the clinical performance of the complete YU Sleep formula.
Evidence boundaries and unresolved questions
- The individual amounts of tart cherry, magnesium glycinate, apigenin, lemon balm, 5-HTP, L-theanine and GABA are not disclosed.
- The reviewed panel separately lists 0.9 mg melatonin and does not establish that this melatonin originates from tart cherry.
- Research using a disclosed ingredient dose cannot be matched to YU Sleep when the corresponding product dose is hidden.
- No certificate of analysis or independent batch-testing report was included in the source set reviewed.
- Pro Review Metric has not documented firsthand use, dropper measurement or physical inspection of the finished product in this dossier.
- Long-term melatonin safety is not established, and product-content variation is a documented concern for melatonin supplements.
- People taking medications, pregnant or breastfeeding people, children and people with persistent sleep problems should seek qualified guidance before use.
How this dossier was prepared
The Pro Review Metric Editorial Team compared the reviewed Supplement Facts panel, bottle directions, package presentation and ClickBank checkout with the current seller page, federal health guidance and selected human research records.
Seller claims were not treated as independent evidence. Ingredient studies were used only to describe research context and were not presented as proof that YU Sleep will produce the same result, especially where the formula hides the relevant dose.
See the Methodology, Editorial Policy and Editorial Team pages for the standards governing source selection, authorship, AI assistance, affiliate relationships and corrections.
Update history
Dossier created. Label facts, package totals, checkout terms, federal guidance and ingredient-level research boundaries mapped for publication.