The ingredients in Yu Sleep are generally well tolerated by healthy adults at typical doses, and the most commonly reported effects of such ingredients are mild: drowsiness, morning grogginess, vivid dreams, headache or stomach upset. But we haven’t seen published safety data on the finished product, so people on medication, pregnant or breastfeeding, or with health conditions should speak to a doctor first.
“Side effects” is one of the most searched questions about any supplement. Here’s a straight answer based on what’s known about the ingredients.
Possible Effects by Ingredient
Commonly Reported
- Melatonin: drowsiness, headache, vivid dreams
- Magnesium: loose stools, stomach upset at higher amounts
- Tart cherry: stomach upset in larger quantities
- L-theanine and GABA: generally mild, sometimes drowsiness
Usually Helpful to Know
- Most effects are mild and dose-related
- Start with the lowest serving
- Stop if anything feels wrong
For detail on each, see our ingredient breakdown, and for grogginess in particular, causes and fixes.
Who Should Be Careful
Are pregnant or breastfeeding, take prescription medication (especially blood thinners, diabetes, blood pressure or antidepressant medicines), have a chronic condition, have an allergy to any ingredient, or are giving it to a child.
Our interactions guide covers the main drug combinations, and this guide addresses nightly use.
What Safety Data Exists
Supplements aren’t reviewed by the FDA before sale, and we haven’t seen published clinical safety data for Yu Sleep itself, only for its individual ingredients.
Don’t drive or operate machinery until you know how it affects you. If you notice a rash, swelling, trouble breathing, a racing heart or any other concerning symptom, stop and seek medical advice. For the broader picture, see our legitimacy review.
Read the Full Label First
We currently point readers to Yu Sleep’s official checkout page. Intended for readers in the US, Canada & UK.
See Current Pricing →Frequently Asked Questions
What are the possible side effects of Yu Sleep?
The label lists ingredients such as melatonin, magnesium, L-theanine, GABA and tart cherry. Possible effects of these in general include drowsiness, morning grogginess, vivid dreams, headache, upset stomach or loose stools. We haven’t seen published safety data on the finished product itself.
Who should not take Yu Sleep?
Anyone pregnant or breastfeeding, anyone taking prescription medication (especially blood thinners, diabetes, blood pressure or antidepressant drugs), anyone with a chronic health condition, and children should speak to a doctor first. Anyone with an allergy to an ingredient should avoid it.
Can I drive after taking Yu Sleep?
No. Like any product that can cause drowsiness, you should not drive or operate machinery until you know how it affects you, and generally not after taking it at bedtime if you feel groggy.