Three respected sleep formulas, three different ingredient philosophies: Sports Research Sleep Complex, Pure Encapsulations Best-Rest Formula, and Thorne Deep Sleep Complex. The difference is not marketing, it is what is actually on the label: which actives, at what doses, and with which trade-offs. This is a spec-by-spec comparison of the published formulas, so you can match the ingredient list to what you are trying to fix, not the tagline.
Spec Snapshot: What Is Actually in Each Formula
The three formulas overlap on calming amino acids but diverge sharply on melatonin, 5-HTP, and botanical breadth. This table is the whole comparison in one view. Everything below is detail.
Doses are per label serving as published by each brand and can change with reformulation. Confirm the current label before buying. Thorne Deep Sleep Complex lists its actives but does not publish every per-ingredient dose as clearly; confirm amounts on the bottle.
| Attribute | Sports Research Sleep Complex | Pure Encapsulations Best-Rest | Thorne Deep Sleep Complex |
|---|---|---|---|
| Core approach | Amino acids + magnesium + valerian | Broad botanical stack + low-dose melatonin | Lean, theanine-led blend |
| Melatonin | 2 versions: 0mg (melatonin-free) or 5mg | 1mg | ~1mg (confirm on label) |
| L-Theanine | 200mg | 50mg | Yes (~200mg range; confirm) |
| GABA | 125mg | 300mg | No |
| 5-HTP | 100mg | No | No |
| Valerian | Yes (2% valerenic acid) | 400mg (0.8% valerenic acid) | No |
| Magnesium | 3 forms (hydroxide, glycinate, citrate) | No | No |
| Other botanicals | None | Passionflower, hops, lemon balm, chamomile | Chamomile, Maizinol (corn leaf) |
Sports Research Sleep Complex — The Amino-Acid + Magnesium Stack
Sports Research is the only one of the three built around three forms of magnesium plus 5-HTP, and it is sold in two versions: a melatonin-free 5-in-1 and a 6-in-1 that adds 5mg of melatonin. Per serving it delivers magnesium (Aquamin hydroxide, glycinate, citrate), valerian standardized to 2% valerenic acid, 200mg L-theanine, 125mg GABA, and 100mg 5-HTP. Suggested use is 2 capsules 30 to 45 minutes before bed. It is vegan, Non-GMO Project Verified, and third-party tested.
Pick the version deliberately. If you want to avoid melatonin grogginess, choose the melatonin-free 5-in-1. If you specifically want melatonin, the 6-in-1 has 5mg, which is a relatively high dose (many people do well on 0.5 to 3mg), so it is not the right pick for anyone melatonin-sensitive. The 5-HTP is the ingredient to note most: it is the one with the most significant interaction profile (see Safety Notes).
“Three forms of magnesium plus theanine is a sensible calming base. The 5-HTP is where you slow down and check your meds first, not a reason to avoid it, just a reason to read the label.” — Eugene Thong, CSCS
Best fit: people who want a magnesium-forward blend, or who want the option of a melatonin-free formula. Weaker fit: anyone on SSRIs/SNRIs or MAOIs (the 5-HTP), or anyone wanting a broad herbal blend.
Full review: Sports Research Sleep Complex Review
Pure Encapsulations Best-Rest Formula — The Broad Botanical Stack
Best-Rest is the widest botanical blend of the three, pairing five calming herbs with GABA, theanine, B6, and a low 1mg dose of melatonin. Per 2-capsule serving: melatonin 1mg, GABA 300mg, L-theanine 50mg, valerian 400mg (0.8% valerenic acid), plus lemon balm, hops, passionflower, and chamomile extracts, and activated B6. It is hypoallergenic, vegan, and free of common allergens.
Where the original “heavy-hitter” label is only half right: Best-Rest is the broadest on herbs, but its melatonin (1mg) is actually lower than Sports Research’s melatonin version (5mg), and it has the highest GABA of the three (300mg). So “strongest” depends on the axis: most botanicals, yes; most melatonin, no. This is the pick if you respond to multi-herb blends (valerian, hops, passionflower, lemon balm, chamomile) rather than to a single big melatonin dose. Note it also carries the most contraindications of the three because of that botanical breadth.
“A five-herb blend gives more levers to pull, which helps some people and overwhelms others. Just respect the interaction list, passionflower and valerian with sedatives is a real conversation, not a footnote.” — Charles Damiano, B.S. Clinical Nutrition
Best fit: people who prefer botanical blends and want only low-dose melatonin. Weaker fit: anyone on sedatives, benzodiazepines, MAOIs, corticosteroids, or with the conditions listed in Safety Notes, and anyone sensitive to Asteraceae-family plants (chamomile).
Full review: Best-Rest Formula Review
Thorne Deep Sleep Complex — The Lean, Theanine-Led Blend
Thorne takes the leanest approach: L-theanine, chamomile, and Maizinol (a corn-leaf extract), marketed as supporting all phases of the sleep cycle, with no valerian, GABA, magnesium, or 5-HTP. It is the shortest ingredient list of the three, which is the point, fewer inputs, fewer interaction surfaces. Thorne is known for four rounds of testing per product and third-party certification, and its related Sleep+ disc uses a similar theanine + chamomile + 1mg melatonin approach.
One honesty note on specs: Thorne publishes the actives clearly but is less explicit about every per-ingredient milligram than Sports Research or Pure Encapsulations. Confirm the exact doses on the current bottle before relying on them. What is clear is the philosophy: minimal, theanine-forward, low or no melatonin, and no 5-HTP or valerian, which makes it the simplest interaction profile of the three.
“Fewer ingredients is a feature when you are stacking other supplements or medications. Less to collide with. That is the real case for a lean formula, not that it is stronger.” — Eugene Thong, CSCS
Best fit: people who want a minimal blend, are already taking other supplements, or want to avoid valerian, GABA, and 5-HTP. Weaker fit: people who want magnesium or a broad herbal stack in one capsule.
Full review: Thorne Deep Sleep Complex Review
Which Sleep Supplement Fits You?
Match the label to your goal, and to your medication list, not to the marketing adjective.
- Want magnesium and the option to skip melatonin: Sports Research (choose the melatonin-free version). Note the 5-HTP interaction first.
- Prefer a broad herbal blend with only low-dose melatonin: Pure Encapsulations Best-Rest, if you clear the botanical contraindications.
- Want the simplest, leanest formula with the fewest interaction surfaces: Thorne Deep Sleep Complex.
- On antidepressants (SSRI/SNRI/MAOI): be especially cautious with the Sports Research formula because of its 5-HTP, and talk to your prescriber before any of them.
- On sedatives or benzodiazepines: the valerian and passionflower in the first two blends are the ones to raise with your clinician.
Safety Notes (Read Before Buying)
These are common, documented cautions for the ingredients in these formulas. They are general information, not a substitute for your clinician’s advice.
- 5-HTP (in Sports Research): can interact with antidepressants (SSRIs, SNRIs, MAOIs) and other serotonergic drugs. Do not combine without medical guidance.
- Melatonin (in the SR melatonin version, Best-Rest, and Thorne): may be contraindicated with certain conditions and medications, and can cause next-day grogginess at higher doses. Do not drive after taking it. The 5mg SR version is on the higher side.
- Valerian and passionflower (in SR and Best-Rest): can compound the effect of sedatives, benzodiazepines, and other CNS depressants, and alcohol. Valerian is associated with vivid dreams and occasional GI upset.
- Botanicals in Best-Rest: the label notes cautions around depression, autoimmune disease, asthma, MAO inhibitors, corticosteroids, blood thinners, Asteraceae-family sensitivity (chamomile), and pregnancy/nursing. Read it in full.
- Everyone: do not combine multiple sleep supplements without guidance, and avoid alcohol. If sleep problems persist beyond a few weeks, see a clinician rather than escalating doses.
Sleep difficulty can have underlying medical causes. If it is persistent or affecting your daily life, a professional evaluation matters more than any supplement.
FAQ
- Which has the most melatonin?
- The Sports Research 6-in-1 version, at 5mg. Best-Rest and Thorne use about 1mg, and Sports Research also sells a melatonin-free version. More melatonin is not automatically better; many people respond to 0.5 to 3mg and get grogginess above that.
- Which is the simplest formula?
- Thorne Deep Sleep Complex, built around L-theanine, chamomile, and Maizinol, with no valerian, GABA, magnesium, or 5-HTP. That makes it the easiest to stack alongside other supplements.
- Which has the broadest herbal blend?
- Pure Encapsulations Best-Rest, with valerian, passionflower, hops, lemon balm, and chamomile plus GABA, theanine, and 1mg melatonin. Broadest botanicals, but also the most contraindications to check.
- I take an antidepressant. Does that change things?
- It can matter a lot. The Sports Research formula contains 5-HTP, which can interact with SSRIs, SNRIs, and MAOIs. Do not start any of these without talking to your prescriber, and be especially cautious with 5-HTP-containing products.
- Which is melatonin-free?
- The melatonin-free version of Sports Research Sleep Complex. Best-Rest and Thorne both contain low-dose melatonin, so check the label if you want to avoid it.