What the label actually discloses
The supplied Yu Sleep Supplement Facts panel identifies vitamin B2, vitamin B6, melatonin and a proprietary blend. Unlike the three measured entries, the 637 mg blend has only a combined weight. Seven ingredients sit inside it: red tart cherry juice concentrate, magnesium glycinate, apigenin, lemon balm extract, 5-HTP, L-theanine and GABA.
This is a meaningful difference for a buyer comparing published studies. For example, a study of magnesium at a particular dose cannot be matched to Yu Sleep, because the label does not state how much magnesium glycinate or elemental magnesium the serving contains. The same constraint applies to each other blend component.
Measured ingredients: what the amounts mean
Vitamin B2 is listed at 0.5 mg (38% Daily Value), B6 at 0.5 mg (29% DV), and melatonin at 0.9 mg. The amounts refer to one 2 mL serving, not one dropper. The bottle provides approximately 30 servings according to the uploaded label.
Melatonin has an established biological role in circadian timing; that is different from claiming that Yu Sleep itself has been clinically shown to improve sleep maintenance. B vitamins support normal functions but are not stand-alone proof of efficacy for a sleep-support formula.
Why ingredient-level evidence has limits
Published research may use different forms, populations, dosages or combinations than Yu Sleep. Even high-quality research on a single ingredient is not a finished-product trial. No finished-product clinical trial was supplied for verification in this review.
A useful reading approach is to separate three questions: Is the ingredient listed? How much is listed? Has the finished formula at that dose been tested for the outcome being claimed? This page can answer the first and some of the second, but it cannot establish the third.
Questions to bring to the seller or clinician
Ask for a current Supplement Facts panel and the amount of each blend constituent if you need a dose-specific safety review. If you take antidepressants, prescription sleep medicines or any other regularly used medicines, bring the full ingredient list to a pharmacist or clinician before adding Yu Sleep.
Yu Sleep Supplement Facts at a glance
| Declared component | Per 2 mL serving | % Daily Value |
|---|---|---|
| Vitamin B2 (riboflavin 5-phosphate) | 0.5 mg | 38% |
| Vitamin B6 (pyridoxal 5-phosphate) | 0.5 mg | 29% |
| Melatonin | 0.9 mg | Not established |
| Proprietary blend | 637 mg | Not established |
The seven constituents of the 637 mg proprietary blend are not separately quantified on the supplied label.
Verify the current label, total checkout cost, shipping, seller terms and any eligible digital bonuses before ordering. We may earn a commission if you buy through this link.
References & source notes
Product-specific values come from the supplied Yu Sleep label or seller material. Government sources explain general health evidence; they are not endorsements of Yu Sleep.