Melatonin — 5 mg and 50 mg, and the gap matters
Two strengths of one ingredient. Sleep research typically uses 0.5 to 5 mg, so the choice between these two capsules is the whole decision here.
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What it is
Melatonin, in two strengths: 5 mg and 50 mg. Sixty capsules either way.
Why people consider it
Melatonin is the hormone your body uses to signal that it is night. Supplementing it is studied mainly for two things: falling asleep sooner, and shifting a body clock that has drifted — jet lag being the clearest case.
It is one of the more straightforward supplements to reason about, because it is a single molecule with a specific signalling role rather than a nutrient you might be short of.
What makes this listing worth understanding before you buy
The dose spread, and it is unusual enough to be the subject of this page rather than a footnote.
Most sleep research uses somewhere between 0.5 mg and 5 mg. Some of the better-regarded work uses doses at the very bottom of that range — a few tenths of a milligram — and finds them as effective as larger ones for sleep onset. The relationship between dose and effect here is not a straight line, and taking more is not a stronger version of taking some.
The 5 mg capsule sits at the top of that common range. The 50 mg capsule is about ten times above it. High-dose melatonin does exist in research, but for other purposes and in other settings — it is not a sleep dose that happens to be bigger.
So the honest framing of this listing is: one product, two quite different propositions. The 5 mg is an ordinary melatonin capsule at an ordinary price. The 50 mg is a high-dose preparation, and anyone choosing it should be choosing it deliberately.
We are not going to tell you which to take. What we can do is put the numbers next to each other, which the listing does not.
Key facts
| Price | $15 — 2 options from $15 when last checked — not confirmed as current |
|---|---|
| Count | 60 per bottle |
| Cost per unit | Not quoted — depends on the current price, which we have not confirmed |
| Serving size | One or more capsules per day, with or without food (manufacturer statement) |
| Contains | Melatonin |
| Certificate of analysis | Not published |
| Availability | In stock when checked on 2026-09-04 — that reading is now out of date |
Who it may suit
- You already use melatonin and know which dose suits you.
- You want plain melatonin without the herbal blend most sleep products bundle around it.
- You are travelling across time zones and want a simple, cheap option.
Less of a fit if…
- You are new to melatonin. Start lower than either of these, which usually means a different product.
- You are in a country where melatonin is prescription-only — much of Europe, among others.
- You are giving it to a child. That is a clinician’s decision, not a shelf decision.
- You want a sleep aid that addresses why you are not sleeping. Melatonin shifts timing; it is not a sedative.
Worth knowing before you buy
What we verified
9 statements on this page are tiered and traced to a source. Manufacturer statements are labelled as manufacturer statements rather than repeated as findings.
Show the evidence table
Where each claim on this page comes from
Every factual statement above is listed here with its source. Rows marked “manufacturer claim” are the manufacturer’s description of its own product, reported without endorsement.
| Tier | Claim | Kind | Source |
|---|---|---|---|
| E | Melatonin is an endogenous hormone involved in circadian signalling. | External source | NIH National Center for Complementary and Integrative Health, melatonin overview |
| E | Clinical research on melatonin for sleep onset commonly uses doses in the range of 0.5 to 5 mg. | External source | Peer-reviewed meta-analyses of melatonin dosing for sleep onset latency
Population: Healthy adults with sleep-onset difficulty; matches the general adult reader |
| E | Low melatonin doses have performed comparably to or better than higher doses for sleep onset in published comparisons. | External source | Peer-reviewed dose-comparison studies of melatonin for sleep onset
Population: Healthy adults; matches the general adult reader |
| E | Melatonin is available without prescription in the United States and is a prescription medicine in many other countries. | External source | National regulatory listings for melatonin classification |
| B | The product is offered in two variants, 60 capsules at 5 mg for $15.00 and 60 capsules at 50 mg for $30.00, both available at the 2026-09-04 inventory check. | Specification | MitoLife storefront inventory endpoint, retrieved 2026-09-04 |
| B | The unit cost is $0.25 per capsule for the 5 mg variant and $0.50 per capsule for the 50 mg variant. | Specification | Arithmetic from the verified storefront prices |
| B | The 50 mg variant supplies approximately ten times the upper end of the dose range commonly used in sleep research. | Specification | Arithmetic against the published research dose range |
| A | The suggested usage published on the listing is one or more capsules per day, with or without a meal, and is the same for both strengths. | Manufacturer statement | MitoLife product listing, retrieved 2026-09-04 Manufacturer statement, not independently verified. |
| F | Our view: the dose spread between the two variants is the substance of this listing rather than a caveat about it, which is why this page leads with it. | Our editorial view | Editorial assessment Our view: this is our editorial judgement, not a finding. |
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Price not current Needs re-checkingOur price and stock reading for this product is out of date, so we are not presenting it as current. The rest of this page still stands.
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