14 SUPPLEMENTS · UPDATED 2026-10-31
Supplements — 14 evidence-based picks reviewed
Prices from Amazon and brand-direct stores, with cost per night worked out so a cheap bottle that runs out in three weeks does not look like a bargain. Dose, form and third-party testing compared side by side. No sponsored ranking.
Value map
14 products
Our score against today's price
Further left is cheaper; higher is a better score. Green dots are our picks for this category. See the picks ↓
How to choose
Three steps to the right pick
Match it to how you sleep
Your position, budget and the problem you're fixing narrow the field fast.
Take the 60-sec quiz →Compare the shortlist
Weigh the picks head-to-head on the specs that matter — filter and sort the table.
Jump to comparison ↓Check the price, then buy
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14 of 14 shown. Click any product for the full review + all retailer prices.
Best for...
6 category winners — different needs, different picks. All editorially scored against published specs.
Doctor's Best High Absorption Magnesium Glycinate 200mg (240ct)
Value-focused buyers, athletes
Life Extension Melatonin 6 Hour Timed Release 300 mcg (100ct)
The cheapest sticker price in the lineup
NOW Foods L-Theanine 200mg (120ct)
200mg L-theanine per capsule, GMP-certified, no melatonin
ZzzQuil PURE Zzzs Melatonin Gummies
1mg per gummy, 2mg per serving — the low end of the category
Nature Made Melatonin 5mg (300ct)
USP-verified and third-party tested, 300 tablets
Nested Naturals LUNA Sleep Aid
Melatonin plus seven botanicals and amino acids in one two-capsule serving
Help for nights your mind won't switch off.
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Biggest savings vs list price
NOW Magnesium Citrate 200mg
NOW Foods L-Theanine 200mg (120ct)
ZzzQuil PURE Zzzs Melatonin Gummies
Olly Sleep Gummies (3mg melatonin + L-theanine, 50ct)
Natrol Melatonin 5mg Fast Dissolve
11 brands compared · Amazon prices checked twice a day
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How to pick a sleep supplement in 2026
Five decisions collapse this whole category into a clear pick.
1. Start with magnesium, not melatonin
For garden-variety trouble winding down, magnesium has some randomised-trial evidence for sleep onset in older adults — but only three small trials, rated low to very low quality by the authors who pooled them. Those 151 participants fell asleep about 17 minutes faster than on placebo. Two of the trials used magnesium oxide and one used citrate; none used the glycinate that dominates the shelves, so these trials provide no evidence that glycinate outperforms other forms. The largest gave 500 mg of elemental magnesium daily for eight weeks — that is the regimen those researchers studied in that age group, not a dose we are recommending to you. Magnesium interacts with several common prescriptions; ask a pharmacist before starting.
2. Melatonin: a timing tool, not a general sleeping pill
Melatonin fits body-clock problems such as delayed sleep phase better than general insomnia, where its effect is small. The trials in the review that guide cites used 0.1 to 10 mg for two to five weeks. We report the doses trials used, not a dose to take — ask a pharmacist or your doctor. The trial regimens, and the 2023 JAMA analysis that found 22 of 25 US melatonin gummy products inaccurately labelled, are in our natural sleep remedies guide.
3. Capsule, gummy, or powder?
Capsules (Doctor's Best, NOW) give exact dosing with no sugar. Gummies (Olly) win on compliance — you'll actually take them — at the cost of 2-3 g sugar and looser dosing. Powders let you titrate but taste like it. Pick the form you'll take consistently at the same time nightly; consistency beats format.
4. Check the safety boxes
Magnesium interacts with some antibiotics and blood-pressure medication; melatonin with blood thinners and immunosuppressants. Pregnant, nursing, or on prescriptions → ask your pharmacist first, it's a free consult. Look for third-party testing (USP, NSF) — supplements are not FDA-approved products and the label is a promise, not a guarantee.
5. Judge value per night, not per bottle
Doctor's Best glycinate runs about $0.17/night over a 4-month bottle — the category's best ratio. Olly gummies cost about 3x per night for the same actives plus sugar. A $20 bottle that lasts 120 nights is the cheapest legitimate sleep intervention on this site.
What do sleep supplements actually cost?
Per-night cost differs several times over across the products we track, a spread the price on the bottle hides completely, because pack sizes and doses differ as much as prices do. Melatonin is the cheapest per dose but is a timing tool rather than a nightly sedative. The table works each one out from the price its own page shows today and the dose on its label.
| Supplement | Price | Nights | Per night |
|---|---|---|---|
| Life Extension Melatonin 300mcg100 tablets, 1/night | $9.00(Amazon price as of – Details) | 100 | $0.09 |
| Nature Made Melatonin 5mg300 tablets, 1/night | $29.47(Amazon price as of – Details) | 300 | $0.10 |
| NOW L-Theanine 200mg120 capsules, 1/night | $15.78(Amazon price as of – Details) | 120 | $0.13 |
| Doctor's Best Magnesium Glycinate240 tablets, 2/serving | $23.99(Amazon price as of – Details) | 120 | $0.20 |
| Thorne Glycine250 capsules, 2/serving | $31.00(Amazon price as of – Details) | 125 | $0.25 |
| Sports Research L-Theanine 200mg60 softgels, 1/night | $19.95(Amazon price as of – Details) | 60 | $0.33 |
| Olly Sleep Gummies50 gummies, 2/serving | $12.88(Amazon price as of – Details) | 25 | $0.52 |
| Nested Naturals LUNA60 capsules, 2/serving | $19.95(Amazon price as of – Details) | 30 | $0.66 |
| Thorne Magnesium Bisglycinate60 scoops, 1/night | $52.00(Amazon price as of – Details) | 60 | $0.87 |
| Life Extension Neuro-Mag90 capsules, 3/serving | $30.78(Amazon price as of – Details) | 30 | $1.03 |
Cost per night = pack price ÷ servings per pack, using the dose on each product's own label. Each price is the one the product's own page shows; Amazon prices carry the date and time Amazon gave them, and a product with no current price shows “Check price” and no per-night figure. Four tracked supplements are missing from this table because their listings give a pack-size range rather than a fixed count, and a per-night figure would be invented rather than calculated.
One caveat worth more than the price difference: supplements are not FDA-approved products, magnesium interacts with some antibiotics and blood-pressure medication, and melatonin interacts with blood thinners and immunosuppressants. If you are pregnant, nursing, or taking prescriptions, the pharmacist consult is free and worth more than saving $0.20 a night.
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