Label breakdown · Updated November 2026
We read the Yu Sleep label so you don't have to
Nine ingredients, one disclosed melatonin dose, one proprietary blend. Here's what the panel tells you — and what it doesn't.
1. What the label discloses exactly
Melatonin at 0.9 mg is the line we'd point out first. It's a fraction of the 5–10 mg common on store shelves, and it sits in the range sleep researchers generally consider enough for most adults. B6 is included in its active form (pyridoxal 5-phosphate), which the body uses to make serotonin and melatonin.
2. What's inside the 637 mg blend (amounts not disclosed)
The blend lists, in order: red tart cherry juice concentrate, magnesium glycinate, apigenin, lemon balm extract, 5-HTP (from griffonia seed), L-theanine and GABA. Labels list blend ingredients from most to least by weight, so tart cherry is the largest and GABA the smallest — but that's all we can infer.
| Ingredient | Why it's there | Human evidence for sleep |
|---|---|---|
| Tart cherry | Natural melatonin and polyphenols | Limited small trials, mixed |
| Magnesium glycinate | Relaxation; gentle on the stomach | Limited clearest in people low in magnesium |
| Apigenin | The calming compound in chamomile | Limited |
| Lemon balm | Traditional calming herb | Limited |
| 5-HTP | Precursor to serotonin and melatonin | Very limited + medication interactions |
| L-theanine | Calm without sedation | Limited studies mostly use 200 mg |
| GABA | Calming messenger | Limited brain uptake from oral doses unclear |
Math check: seven ingredients share 637 mg. Even if one took up nearly all of it, studied doses of some ingredients (for example 200 mg of L-theanine or several hundred milligrams of magnesium) can't all fit. Expect a gentle formula, not research-level doses of each ingredient.
Want the manufacturer's explanation of the formula? Their page opens with a video presentation.
See the official page →3. The "other ingredients"
Distilled water, glycerin, medium invert syrup, citric acid, erythritol, sodium citrate, natural flavors, gum arabic, xanthan gum and potassium sorbate. In plain terms: a sweetened, flavored liquid base with common preservatives. If you track sugar, note the invert syrup — the label doesn't list grams of sugar per serving.
4. Safety lines we'd add to the label
- Don't combine with antidepressants (SSRIs, SNRIs, MAOIs), triptans, tramadol or other serotonin-affecting drugs without your doctor — because of the 5-HTP.
- Ask first if you take sleep medication, sedatives, blood thinners or blood-pressure medication.
- Not for pregnancy, nursing or under 18.
- Melatonin can cause next-day drowsiness — don't drive if you feel drowsy.
5. Questions we'd still ask the manufacturer
- How much L-theanine, magnesium and 5-HTP is in each serving?
- Is each batch tested by an independent lab, and can customers see the results?
- How many grams of sugar are in a serving?
We'll update this page if we get answers. Meanwhile, the 60-day money-back guarantee lowers the cost of finding out whether it suits you — read the refund terms on the official site first.
Verdict on the label: transparent about melatonin, vague about everything else. A reasonable gentle option for occasional restless nights if none of the safety lines apply to you.
Check bundles & guarantee on the official site →Affiliate link. Individual results vary.
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