You’ve probably seen the ads — a familiar TV face promising you’ll fall asleep faster, stay asleep longer, and wake up refreshed, all from a “non-habit-forming” nightly capsule. Relaxium Sleep is one of the best-marketed sleep supplements in America. But marketing and evidence are two different things, and this review exists to separate them.
A note on how this review works: this is an independent, research-based review. We didn’t take the product, we don’t sell it, and there are no affiliate links here — we earn nothing if you buy it or skip it. Everything below comes from the published label, peer-reviewed research on the individual ingredients, government safety databases, and the product’s own legal and regulatory history. That’s the only honest way to review a supplement.
The quick verdict
Relaxium Sleep contains a mix of ingredients with genuinely mixed evidence — some plausible (magnesium, L-tryptophan), some dosed well above what sleep research typically uses (5 mg melatonin), and some present in amounts that look low compared with studied doses (the 228.9 mg proprietary valerian-hops blend). Relaxium Sleep’s flagship clinical trial found improvements only on subjective questionnaires — wearable sleep trackers showed no objective gains — and the trial later drew an FDA warning letter over regulatory and data-integrity concerns. Add a $925,000 auto-renewal settlement, a pattern of billing complaints, and real interaction risks, and the honest summary is: an expensive blend of mostly ordinary ingredients, wrapped in extraordinary claims.
If you try it, do it with eyes open — and talk to your doctor first if you take any prescription medication.
What’s actually in the bottle: every ingredient vs. the research
Serving size is 2 capsules. Here’s the full Supplement Facts panel with what the research actually says about each ingredient at something like these doses:
| Ingredient | Amount (per 2 capsules) | What the evidence says |
|---|---|---|
| Magnesium (as oxide/citrate/glycinate) | 100 mg | Sleep evidence is modest and mostly in people with poor magnesium status. 100 mg is well below the adult RDA (310–420 mg/day) — a reasonable supplemental amount, not a red flag. |
| L-Tryptophan | 500 mg | A precursor to serotonin and melatonin. Some evidence for mild sleep benefit — but the real story is the interaction risk (see Safety below). |
| Valerest proprietary blend (valerian root extract 5:1 + hops extract 10:1) | 228.9 mg total, split undisclosed | This is the problem child. Valerian trials typically used 300–600 mg of extract — and here the entire valerian-plus-hops blend is 228.9 mg with the split hidden, so the actual valerian dose is plausibly far below studied amounts. NCCIH’s verdict on valerian for insomnia: evidence “inconsistent,” and the American Academy of Sleep Medicine recommended against it for chronic insomnia. |
| Ashwagandha (root & leaf, 8% withanolide glycoside conjugates) | 125 mg | Sleep trials of ashwagandha generally used 250–600 mg/day of standardized extract — this dose is at the low end. Also carries the most notable safety flags of any ingredient here. |
| GABA | 100 mg | Evidence for oral GABA improving sleep is weak and inconsistent — it’s unclear how much dietary GABA even reaches the brain. |
| Chamomile flower powder | 75 mg | Traditionally used for sleep, but NCCIH notes there is “no conclusive evidence from clinical trials” that chamomile helps insomnia. |
| Passionflower flower extract (10:1) | 75 mg | Small, preliminary studies only — nowhere near conclusive for insomnia. |
| Melatonin | 5 mg | Here’s the dose mismatch: the melatonin doses studied in most sleep research are far lower than 5 mg — and higher doses don’t mean better sleep. They do mean more next-day grogginess for many people. |
Two things worth knowing: first, “proprietary blend” means the company doesn’t have to tell you how much valerian vs. hops you’re getting — which makes the valerian dose impossible to compare with the research. Second, don’t confuse this with the company’s other products: Sensoril ashwagandha and 5-HTP are in “Relaxium Calm,” not Relaxium Sleep.
The “clinically proven” claim, deconstructed
Relaxium Sleep’s marketing has leaned heavily on a “university clinical study.” Here’s what independent reviewers found when they pulled the thread:
- The study (known as ABRI-002) randomized 37 people and 35 completed it, with only a one-week blinded period. Participants reported better sleep on questionnaires — but the wearable sleep trackers (Fitbit/actigraphy) showed no improvement in time in bed, total sleep time, or light, deep, or REM sleep. Subjective ratings improved; objective measurement didn’t.
- It was published in the Journal of Insomnia and Sleep Disorders from Annex Publishers — a low-prestige outlet, not a major sleep journal.
- In April 2025, the FDA issued a warning letter to the research institute behind the Relaxium Sleep trial, saying the investigation required an investigational new drug application (IND) and raising data-integrity concerns.
- A 2022 class action challenged the “clinically proven” marketing; it was settled.
- The “university study” supposedly behind the Valerest blend cannot be located — no named university, no peer-reviewed paper, no disclosed sample size or dose.
None of this means every ingredient is useless. It means the product’s central proof claim — that this blend is clinically proven to improve sleep — rests on a small, short, company-funded trial whose objective measurements showed nothing, published in a minor journal, later flagged by the FDA. That’s a long way from “proven.”
Safety: the part the ads skip
Sleep supplements feel harmless because they’re “natural.” The ingredients in this bottle deserve the same respect you’d give any bioactive product:
Serotonin syndrome risk. This is the big one. NCCIH warns that L-tryptophan supplements “may cause life-threatening serotonin toxicity when used with medicines that affect serotonin metabolism.” At 500 mg of L-tryptophan per serving, anyone taking SSRIs, SNRIs, MAOIs, or tricyclic antidepressants should not use this product without direct medical supervision. This is not a “consult your doctor” formality — it’s the most serious interaction in the bottle.
Ashwagandha cautions. Rare but documented liver-injury reports exist; it can affect thyroid hormone levels and blood sugar and blood pressure; and it may interact with immunosuppressants and sedatives. Avoid in pregnancy (animal data raises concerns) and while breastfeeding.
Melatonin realities. NCCIH notes melatonin “appears to be relatively safe for short-term use, but its long-term safety has not been established.” Two clinical practice guidelines (2017 and 2019) recommended against using melatonin for chronic insomnia. And the pediatric data is alarming: a 2024 report estimated about 11,000 U.S. emergency department visits from 2019–2022 for unsupervised melatonin ingestion by children aged 5 and younger. Keep the bottle locked away from kids.
Surgery, alcohol, and sedatives. Stop ashwagandha and valerian-containing products at least two weeks before surgery. Don’t combine this product with alcohol, prescription sedatives, or other melatonin products. Expect possible next-day drowsiness — older adults and anyone who drives early should be especially cautious.
Reported side effects from Relaxium Sleep’s own trial included drowsiness, headache, upset stomach, and waking during normal sleep hours.
If you take any prescription drug — especially for depression, anxiety, blood pressure, blood sugar, or thyroid — talk to your doctor or pharmacist before trying this or any sleep supplement. Our broader guide to the science of better sleep covers non-supplement approaches with stronger evidence.
The commercial side: settlements, complaints, and the real price
A supplement review that ignores the business model is only half a review — especially here:
- In 2023, a California court ordered a $925,000 judgment against the company over alleged auto-renewal and false-advertising violations (the company cooperated; no admission of liability).
- The Better Business Bureau has issued a pattern-of-complaint alert, with hundreds of complaints over recent years — the dominant theme: a “free trial” or single order quietly becoming recurring billing.
- Earlier TV marketing claimed you’d “fall asleep 140X faster” and “sleep 266% longer” — percentages that were later dropped from the bottles. When the numbers disappear from the label, that tells you something about the numbers.
- Price math: a direct bottle runs about $39.95 (often less on Amazon). Generic melatonin costs pennies per night. You’re paying a large premium for a blend whose flagship trial showed no objective sleep improvement.
If you order direct, read the checkout page like a contract — specifically anything about trials, subscriptions, and how to cancel — and keep records. The complaint history says this is where the trouble starts.
Who it’s for, who it’s not for, and better alternatives
Might consider it: a healthy adult who understands the evidence is thin, takes no interacting medications, isn’t pregnant, and wants to experiment with a low-risk sleep ritual — with a doctor’s okay.
Should skip it: anyone on antidepressants or other serotonin-affecting drugs; pregnant or breastfeeding women; people with liver disease or thyroid disorders; anyone scheduled for surgery; parents considering it for children; and anyone with persistent insomnia — where the evidence-backed answer is CBT-I, not a capsule.
Alternatives worth knowing: for occasional sleeplessness, the fundamentals in our green noise guide and sleep-hygiene basics (consistent wake time, morning daylight, a cool dark bedroom) outperform any supplement on evidence. For chronic insomnia, ask your doctor about CBT-I — it beats sleep drugs long-term in the research.
Frequently asked questions
Does Relaxium Sleep actually work?
The honest answer: the evidence is weak. The company’s own trial found better scores only on subjective questionnaires — wearable trackers showed no objective improvement in sleep time or sleep stages. Individual ingredients have mixed evidence at best, and some are dosed below (or above) the amounts studied in research.
Is Relaxium Sleep safe?
For most healthy adults it’s likely low-risk, but “likely” isn’t “proven,” and there are real flags: 500 mg of L-tryptophan can cause dangerous serotonin syndrome if combined with antidepressants; ashwagandha has rare liver-injury reports and thyroid effects; and 5 mg of melatonin is well above typically studied doses. Talk to your doctor first if you take any medication.
Why is the 5 mg melatonin dose a concern?
Because more isn’t better with melatonin. Sleep research has generally studied far lower doses, and higher doses are more likely to cause next-day grogginess, vivid dreams, and daytime sleepiness without improving sleep further. A 5 mg dose is several times what most studies used.
What happened with the FDA warning letter?
In April 2025, the FDA sent a warning letter to the research institute behind Relaxium’s clinical trial, stating the study needed an investigational new drug application and raising concerns about data integrity. Separately, a 2022 class-action lawsuit over “clinically proven” marketing was settled, and a 2023 California judgment of $925,000 addressed alleged auto-renewal violations.
What’s a cheaper alternative?
If it’s the melatonin you’re after, generic melatonin costs a fraction of the price per night. If it’s better sleep you’re after, the highest-evidence approaches are free: a consistent wake time, morning daylight, a cool dark bedroom, and — for persistent insomnia — CBT-I through your doctor.
Written by the HealthRovia editorial team. For general information only — not medical advice.
