Top 10 Best 5-HTP Supplements (2026)
01 · Best overall✓ Label verified · Supplement Facts read Sep 7, 2026Best overall: NOW Supplements 5-HTP 100 mg
The no-frills default: a clean 100 mg Griffonia-sourced dose from a high-volume GMP brand at one of the lowest costs per capsule on the list. The right first bottle for most people.
$22 / 120 veg capsules$0.18 / 100 mg capsule
Why it wins: all five scores, pros & cons, full label
- Low price for 120 servings — among the best cost-per-capsule here
- Simple, single-ingredient 100 mg dose — the standard starting strength
- Vegan capsule, Griffonia-sourced, made without gluten/soy, widely available
- No B6/C cofactors included
- Not enteric-coated — some users report mild GI upset on an empty stomach
- House/GMP testing only, not independently third-party certified
- Dose
- 100 mg 5-HTP (1 capsule)
- Source
- Griffonia simplicifolia seed extract
- Cofactors
- None (single-ingredient)
- Coating
- Not enteric-coated
- Count
- 120 veg capsules
- Testing
- NOW in-house QC · GMP facility
Our take — If you just want to try 5-HTP without overthinking it, this is the bottle. It's a clean 100 mg Griffonia dose from a brand that ships at huge volume with consistent GMP quality, at a price that makes a multi-month trial cheap. You give up the cofactors and any enteric coating, and the testing is in-house rather than independently certified — but for a first, standard-strength 5-HTP, NOW is the sensible default. Start at one capsule with food.
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10Who Wins Which Aspect
Sorted by overall SAC Product Score™ — the official ranking.
| # | Pick | Score | Dose & form30% | Source & purity (Griffonia)25% | Third-party testing20% | Value per day15% | Real-world mood/sleep response10% | Cost Per Dose | Buy |
|---|---|---|---|---|---|---|---|---|---|
| 01 | | 9.0 | 9.02 | 9.51 | 8.03 | 10.01 | 8.51 | $0.18 / 100 mg capsule | Check price |
| Low price for 120 servings — among the best cost-per-capsule hereNo B6/C cofactors included | |||||||||
| 02 | | 9.0 | 9.51 | 9.02 | 7.5 | 10.01 | 8.51 | $0.17 / 100 mg capsule | Check price |
| Adds B6 + C — the cofactors in the 5-HTP-to-serotonin conversion pathwayNot enteric-coated | |||||||||
| 03 | | 8.5 | 8.53 | 8.53 | 10.01 | 6.5 | 8.02 | $0.28 / 100 mg capsule | Check price |
| Third-party certified — the strongest testing pedigree on the listPricier per capsule than the mass-market value bottles | |||||||||
| 04 | | 8.3 | 8.53 | 9.51 | 8.03 | 6.0 | 8.51 | $0.47 / 100 mg capsule | Check price |
| Hypoallergenic, very short ingredient list (5-HTP + cellulose)Higher cost per capsule than the value picks | |||||||||
| 05 | | 8.2 | 8.0 | 8.0 | 7.0 | 10.01 | 8.51 | $0.14 / 100 mg tablet | Check price |
| Time-release delivery meters the dose out graduallyTablet, not capsule — uses binders to hold the time-release matrix | |||||||||
| 06 | | 8.2 | 9.51 | 8.53 | 6.5 | 7.03 | 8.51 | $0.28 / 100 mg capsule | Check price |
| Genuinely enteric-coated — designed to reduce stomach exposure and nauseaOnly 60 count per bottle | |||||||||
| 07 | | 8.2 | 7.5 | 8.53 | 8.52 | 9.52 | 6.5 | $0.20 / 200 mg capsule | Check price |
| High 200 mg dose in a single capsule — fewer pills per day200 mg is a high starting dose — not for beginners | |||||||||
| 08 | | 8.0 | 8.0 | 9.02 | 7.5 | 7.03 | 8.02 | $0.25 / 100 mg capsule | Check price |
| HPLC purity verification noted on the labelOnly 60 count per bottle | |||||||||
| 09 | | 7.3 | 7.5 | 7.5 | 7.0 | 7.03 | 7.53 | $0.50 / 200 mg tablet | Check price |
| High 200 mg dose with time-release metering over ~10 hoursOnly 30 tablets per bottle — short runway | |||||||||
| 10 | | 6.9 | 7.5 | 7.5 | 5.5 | 6.0 | 7.53 | $0.97 | Check price |
| Griffonia seed source stated on the panelNo enteric coating or time release, and no B6 | |||||||||
The Other 9, Ranked
- 02
Best with cofactors: Doctor's Best 5-HTP Enhanced with Vitamins B6 & C
9.0SAC Score™Pairs the standard 100 mg dose with vitamin B6 and C — the cofactors involved in converting 5-HTP to serotonin — at a value price. The most complete cheap pick.
StrongestValue per day10.01WeakestThird-party testing7.5- Dose
- 100 mg 5-HTP (1 capsule)
- Source
- Griffonia simplicifolia seed extract
- Cofactors
- Vitamin B6 + vitamin C
All five scores, pros & cons, full label
What We Like- Adds B6 + C — the cofactors in the 5-HTP-to-serotonin conversion pathway
- Excellent value: 120 capsules at one of the lowest prices on the list
- Vegan, Non-GMO, gluten-free and soy-free
What You Live With- Not enteric-coated
- Cofactor doses are modest (supportive, not therapeutic)
- House/GMP testing only, not independently third-party certified
- Coating
- Not enteric-coated
- Count
- 120 veg capsules
- Testing
- House/GMP testing
Our take — This is the pick when you want the conversion pathway fully fed without paying more for it. The 100 mg dose is standard, but adding vitamin B6 and C — the cofactors your body uses to turn 5-HTP into serotonin — is a sensible, low-cost upgrade over plain 5-HTP, and Doctor's Best does it at a price that undercuts most single-ingredient bottles. It isn't enteric-coated and the testing is in-house, which is why it sits just behind NOW. For most people choosing between the two, the cofactors make this the slightly smarter buy.
- 03
Best third-party tested: Thorne 5-HTP (with Vitamin B6)
8.5SAC Score™The testing-forward pick: Thorne is known for third-party certification and is used in pro-sports and clinical settings, with B6 included as a cofactor.
StrongestThird-party testing10.01WeakestValue per day6.5- Dose
- 100 mg 5-HTP (1 capsule)
- Source
- 5-HTP with vitamin B6 cofactor
- Cofactors
- Vitamin B6
All five scores, pros & cons, full label
What We Like- Third-party certified — the strongest testing pedigree on the list
- Includes the vitamin B6 cofactor
- Free of gluten, dairy and soy; used in pro-sports/clinical settings
What You Live With- Pricier per capsule than the mass-market value bottles
- Not enteric-coated
- Single 100 mg strength only
- Coating
- Not enteric-coated
- Count
- 90 capsules
- Testing
- Third-party certified (the standout here)
Our take — Thorne is the pick when independent testing is your priority. It's the one bottle here whose quality is backed by genuine third-party certification rather than a brand's own QC, which is why athletes subject to drug testing and clinicians reach for it — and it includes the B6 cofactor. You pay more per capsule than the value picks and it isn't enteric-coated, so it's not the cheapest or the gentlest. But if 'I want to be sure the label is true' is what you care about most, Thorne earns its place.
- 04
Best clean label: Pure Encapsulations 5-HTP 100 mg
8.3SAC Score™The premium clean-label option: a practitioner-channel brand with a minimal hypoallergenic excipient list — basically 5-HTP and cellulose — for sensitive users.
StrongestSource & purity (Griffonia)9.51WeakestValue per day6.0- Dose
- 100 mg 5-HTP (1 capsule)
- Source
- Griffonia simplicifolia seed extract
- Cofactors
- None (hypoallergenic single-ingredient)
All five scores, pros & cons, full label
What We Like- Hypoallergenic, very short ingredient list (5-HTP + cellulose)
- Trusted practitioner-grade brand with a reputation for clean formulation
- Gluten-free and Non-GMO
What You Live With- Higher cost per capsule than the value picks
- Only 60 count per bottle
- No cofactors and not enteric-coated
- Coating
- Not enteric-coated
- Count
- 60 capsules
- Testing
- House QC · practitioner-grade brand
Our take — Pure Encapsulations is what you buy when excipients matter to you — sensitive stomachs, multiple intolerances, or just a preference for the shortest possible ingredient list. It's essentially 5-HTP and cellulose, from a brand built around hypoallergenic practitioner-channel formulation. You pay more per capsule and get fewer of them, and there are no cofactors or enteric coating, so it's not the value play. But for a clean-label buyer, it's the most reassuring bottle on the list.
- 05
Best budget: Natrol 5-HTP 100 mg Time Release
8.2SAC Score™The best-selling mood/sleep pick whose time-release tablet meters the 100 mg out gradually rather than all at once — at the lowest entry price on the list.
StrongestValue per day10.01WeakestThird-party testing7.0- Dose
- 100 mg 5-HTP (1 tablet)
- Source
- 5-HTP, controlled time-release tablet
- Cofactors
- None
All five scores, pros & cons, full label
What We Like- Time-release delivery meters the dose out gradually
- Strong value — 90 tablets at the lowest price on the list
- Best-known US 5-HTP brand; free of major allergens
What You Live With- Tablet, not capsule — uses binders to hold the time-release matrix
- Time-release is NOT the same as enteric coating (still releases in the stomach)
- No cofactors; house/GMP testing only
- Coating
- Time-release (not enteric-coated)
- Count
- 90 time-release tablets
- Testing
- House/GMP testing · allergen-friendly
Our take — Natrol is the cheapest way into 5-HTP, and the time-release tablet is a genuine point of difference — it spreads the 100 mg out instead of delivering it in one hit, which some people find gentler. Just be clear on what time-release is and isn't: it slows the release, but it does not bypass the stomach the way Solaray's enteric coating is designed to. It's a tablet with binders, single-ingredient, house-tested. For a low-commitment first try where price is the deciding factor, it's the value budget pick.
- 06
Best enteric-coated: Solaray 5-HTP with Vitamin C & B-6 (Enteric Coated)
8.2SAC Score™The only genuinely enteric-coated pick: the coating is designed to bypass stomach acid so the 5-HTP releases lower in the GI tract — and it bundles 200 mg vitamin C and 25 mg B6.
StrongestDose & form9.51WeakestThird-party testing6.5- Dose
- 100 mg 5-HTP (1 capsule)
- Source
- Griffonia simplicifolia seed extract
- Cofactors
- 200 mg vitamin C + 25 mg vitamin B6
All five scores, pros & cons, full label
What We Like- Genuinely enteric-coated — designed to reduce stomach exposure and nausea
- Includes 200 mg vitamin C and 25 mg B6 as conversion cofactors
- Griffonia-sourced, with a 60-day satisfaction guarantee
What You Live With- Only 60 count per bottle
- Enteric coatings can blunt or slow absorption for some users
- 'Lab verified' is a brand claim, not an independent third-party certification
- Coating
- Enteric-coated VegCaps (the only one here)
- Count
- 60 enteric-coated veg capsules
- Testing
- Brand 'lab verified' (not independent certification)
Our take — If 5-HTP upsets your stomach — the most common complaint with it — Solaray is the targeted answer: it's the one product here that's actually enteric-coated, designed to carry the dose past stomach acid and release it lower down, and it throws in the B6 and C cofactors too. The trade-offs are a smaller 60-count bottle and the fact that enteric coatings can slow or blunt absorption for some people. Note also that Solaray's 'lab verified' is its own claim, not an independent certification. For the nausea-prone buyer, though, it's the most thoughtfully built bottle on the list.
- 07
Best high-dose value: Nutricost 5-HTP 200 mg
8.2SAC Score™The higher-dose value pick: a full 200 mg per capsule for people who already tolerate 5-HTP and want fewer pills per day — batch-tested by ISO-accredited labs.
StrongestValue per day9.52WeakestReal-world mood/sleep response6.5- Dose
- 200 mg 5-HTP (1 capsule)
- Source
- Griffonia-sourced 5-HTP
- Cofactors
- None
All five scores, pros & cons, full label
What We Like- High 200 mg dose in a single capsule — fewer pills per day
- 120 capsules at a very low cost per 100 mg-equivalent
- Vegetarian, Non-GMO, and batch-tested by ISO-accredited labs
What You Live With- 200 mg is a high starting dose — not for beginners
- No cofactors
- Not enteric-coated
- Coating
- Not enteric-coated
- Count
- 120 veg capsules
- Testing
- ISO-accredited batch testing · GMP/FDA-registered facility
Our take — Nutricost is the value choice for people who already know they tolerate 5-HTP and want a 200 mg dose without taking two capsules. On a cost-per-100 mg basis it's the cheapest serious option here, and unlike most mass-market brands it batch-tests through ISO-accredited labs. The catch is in the badge: 200 mg is an experienced-user dose, not a place to start. If you're new to 5-HTP, begin with a 100 mg product and graduate to this only if you need more. For the right buyer, it's excellent value.
- 08
Best legacy-brand capsule: Jarrow Formulas 5-HTP 100 mg
8.0SAC Score™A long-standing Griffonia-sourced 100 mg capsule from a respected legacy brand, with HPLC-verified purity noted on the label.
StrongestSource & purity (Griffonia)9.02WeakestValue per day7.0- Dose
- 100 mg 5-HTP (1 capsule)
- Source
- Griffonia simplicifolia seeds (HPLC purity-assured)
- Cofactors
- None
All five scores, pros & cons, full label
What We Like- HPLC purity verification noted on the label
- Reputable legacy supplement brand
- Vegan, Non-GMO and allergen-friendly
What You Live With- Only 60 count per bottle
- No cofactors
- Not enteric-coated
- Coating
- Not enteric-coated
- Count
- 60 veg capsules
- Testing
- HPLC purity verification · house QC
Our take — Jarrow is a perfectly good, clean 100 mg Griffonia capsule from a legacy brand, and its HPLC purity callout is a nice touch of transparency. It lands at #9 not because anything is wrong with it but because it's out-competed on its own terms: NOW and Doctor's Best give you 120 capsules for similar or less money, Pure Encapsulations beats it on clean-label, and Thorne beats it on testing. If it's the one in front of you at a good price, it's a solid single-ingredient buy — just a generalist in a list where most picks have a sharper angle.
- 09
Best high-dose time-release: Natrol 5-HTP 200 mg Maximum Strength Time Release
7.3SAC Score™A 200 mg dose delivered through Natrol's controlled time-release tablet (releases over roughly 10 hours), positioned for daytime mood and appetite support.
StrongestDose & form7.5WeakestThird-party testing7.0- Dose
- 200 mg 5-HTP (1 tablet)
- Source
- 5-HTP, controlled time-release tablet
- Cofactors
- None
All five scores, pros & cons, full label
What We Like- High 200 mg dose with time-release metering over ~10 hours
- One-tablet-daily convenience
- Allergen-friendly and vegetarian
What You Live With- Only 30 tablets per bottle — short runway
- 200 mg is a high dose; start lower if you're new to 5-HTP
- Tablet binders; time-release is not enteric coating
- Coating
- Time-release (~10 hours; not enteric-coated)
- Count
- 30 time-release tablets
- Testing
- House/GMP testing · allergen-friendly
Our take — This is the 200 mg version of Natrol's time-release tablet — the same gradual-release idea at double the dose, aimed at people who want a high, all-day 5-HTP level from a single daily tablet. The time-release metering is the appeal; the 30-count bottle and the fact that 200 mg is an experienced-user dose are the limits. As with the 100 mg version, time-release slows the release but doesn't bypass the stomach. A fine pick if you specifically want high-dose, once-daily, time-released 5-HTP — otherwise the 100 mg picks are the safer start.
- 10
Our own brand: Super Achiever 5-HTP (200 mg)
6.9SAC Score™Our own 5-HTP: Griffonia-sourced, 100 mg per capsule. It ranks here because it has no enteric coating, no test report and a higher price per 100 mg than most of the list.
StrongestDose & form7.5WeakestThird-party testing5.5- Per serving
- 200 mg 5-HTP from Griffonia seed extract, 2 capsules
- Cost per serving
- $0.97 ($0.48 per 100 mg)
- Bottle
- 60 capsules · 30 servings
All five scores, pros & cons, full label
What We Like- Griffonia seed source stated on the panel
- 100 mg per capsule, so you can start with one
- Short formula
What You Live With- No enteric coating or time release, and no B6
- No third-party certificate or published lab report
- Capsule
- Gelatin, standard release
- Certifications
- None on the label
Our take — A plain 5-HTP that does the basics. The ranked picks add testing, a gentler release or a lower price.
5-HTP In Four Short Lessons
Do not combine it with serotonergic medication.
5-HTP raises serotonin, so it must not be taken with SSRIs, SNRIs, MAOIs, triptans, tramadol or other serotonergic drugs; the combination can cause serotonin syndrome. If you take any of these, this is not your supplement.
Start at 100 mg, not 200.
100 mg is the standard starting dose and 200 mg is an experienced-user dose. If you want the capsule to bypass stomach acid, look for a genuinely enteric-coated one; time-release is not the same thing.
Shop on testing and cofactors, not on the source.
Almost every clean 5-HTP comes from Griffonia simplicifolia seed, so the bottles differ on dose, delivery, vitamin B6 as a cofactor and third-party testing. The evidence is real but modest: small, older trials (Shaw 2002).
Shaw 2002 (Cochrane, PMID 12169147) on depression; Cangiano 1992 (PMID 1384305), Cangiano 1998 (PMID 9705024) and Ceci 1989 (PMID 2468734) on appetite/weight — all small, older trials. Weighted 30% dose & form / 25% source & purity / 20% third-party testing / 15% value per day / 10% real-world response; full scoring in the methodology below.
5-HTP is close to a commodity — single-ingredient, almost always from Griffonia simplicifolia seed — so we ranked on the things that actually vary between bottles rather than on hype. Dose and form carries the most weight because it's the decision that changes the experience: the right strength for the buyer (100 mg to start, 200 mg only for experienced users), whether the product is genuinely enteric-coated to reduce stomach exposure, and whether it bundles the B6/C cofactors involved in converting 5-HTP to serotonin. Source and purity comes next — every clean pick is Griffonia-sourced, and we gave credit for explicit purity verification (HPLC) and clearly-documented extraction. Third-party testing is the trust filter: independent certification (Thorne) beats house/GMP testing, and batch-testing by accredited labs (Nutricost) sits in between. Value per day is the tiebreaker — cost per serving at the labeled dose. Real-world mood/sleep response — tolerability, GI comfort on an empty stomach, and how consistently users report a felt effect — settles the rest. We did NOT reward marketing 'lab verified' language that isn't an independent certification, and we did not invent any test results: where a brand only does in-house QC, we say so.
Dose & form (enteric / cofactors) · 30%
Is the strength right for the buyer — 100 mg as a starting dose, 200 mg as an experienced-user option? Is it genuinely enteric-coated to bypass stomach acid (only Solaray here), or time-released (Natrol — useful but not the same thing)? Does it bundle the vitamin B6 (and C) cofactors that the body uses to convert 5-HTP into serotonin? Plain 100 mg is fine; the form tweaks and cofactors earn the extra points.
Source & purity (Griffonia) · 25%
All clean 5-HTP is extracted from Griffonia simplicifolia seed — we required that and gave credit for explicit purity verification. Jarrow's HPLC purity callout and Nutricost's ISO-accredited batch testing score here; a clearly-documented Griffonia source with vegan/Non-GMO status is the baseline. Vague sourcing scores lower.
Third-party testing · 20%
The trust filter. Independent third-party certification (Thorne) is the gold standard and scores highest; batch-testing by ISO-accredited labs (Nutricost) earns solid credit; house/GMP testing only is the floor. A brand's own 'lab verified' marketing claim is NOT an independent certification and we scored it as house testing.
Value per day · 15%
Cost per serving at the labeled dose. A 120-count bottle at a low price (NOW, Doctor's Best) beats a 60-count premium bottle on pure value; the 200 mg picks are judged on cost per 100 mg-equivalent so the higher strength doesn't artificially flatter them. Tiebreaker within a tier, not a reason to buy a worse-tested product.
Real-world mood/sleep response · 10%
Tolerability and the felt experience: GI comfort (5-HTP can cause mild nausea on an empty stomach, which is what enteric coating and time-release try to soften), how consistently users report a mood/appetite/sleep effect, and how easy the format makes daily consistency. Modest by design — the evidence base is real but small, so we don't over-index on subjective response.
How 5-HTP works
- 1
One step from serotonin
5-HTP converts directly to serotonin, the neurotransmitter behind mood and sleep onset. That directness is why it can genuinely help — and why it is not a casual 'stack everything' supplement.
- 2
Timing and cofactors
Vitamin B6 aids the conversion; taking 5-HTP away from protein and toward evening favors the sleep/mood use. Enteric coating reduces the nausea that raw 5-HTP often causes — form and cofactors are our heaviest axis.
- 3
Griffonia source
5-HTP is extracted from Griffonia simplicifolia seed. Clean source and third-party testing matter because contamination history exists in this category — provenance is scored, not assumed.
- 4
The serotonin-syndrome caution
Because it raises serotonin, 5-HTP must NOT be combined with SSRIs, MAOIs or other serotonergic drugs — the risk is real. This is a supplement where the safety note is part of the mechanism, and we state it plainly.
What to expect from 5-HTP
Clear the interactions
If you take any antidepressant or serotonergic medication, stop here and ask a doctor — combining them risks serotonin syndrome. This check comes before any dose.
Sleep onset
Taken in the evening, many notice easier sleep onset fairly quickly. Start low (50-100 mg); nausea is the most common early side effect and enteric forms reduce it.
Mood margin
Mood-support effects, where they occur, build over days to a couple of weeks. Effect is individual — some respond, some do not.
Cycle, do not stack blindly
Many use it short-term or intermittently rather than forever. Keep the dose modest, keep the B6 cofactor, and never layer it onto other serotonergics.
The bottom line
NOW Supplements 5-HTP 100 mg (#1) is the no-drama default.
A clean 100 mg Griffonia dose from a high-volume GMP brand at one of the lowest costs per capsule, scoring 9.4. You give up the B6/C cofactors and any enteric coating, and the testing is in-house rather than independently certified — but for a first, standard-strength 5-HTP it's the sensible pick.
Match the bottle to your need — cofactors, stomach, clean label, testing, or higher dose.
Want the conversion cofactors built in for the same money: Doctor's Best (#2) adds B6 and C. Stomach-prone: Solaray (#5) is the only genuinely enteric-coated option, cofactors included; cleanest possible label: Pure Encapsulations (#3); independent third-party certification above all: Thorne (#6). Already tolerate 5-HTP and want a 200 mg dose: Nutricost (#7) is the value pick and Natrol 200 mg (#8) the time-release one — but neither is where a beginner should start.
Start at 100 mg with food — and never stack it on antidepressants.
Do not combine 5-HTP with antidepressants (SSRIs or SNRIs), MAOIs, triptans, tramadol, or other serotonergic drugs, and get a clinician's sign-off first if you take any of those or have a medical condition. Set expectations honestly: the mood data (Shaw 2002) found a signal but almost no high-quality studies, and the appetite/weight data (Cangiano 1992/1998) came from small obese-subject trials at high doses. Start at 100 mg, take it with food to reduce nausea, give it a few weeks, and treat it as a low-cost, reasonably-evidenced experiment — not a guaranteed fix.
Quick Answers
What is the best 5-htp pick overall?
NOW Supplements 5-HTP 100 mg by NOW Foods is our #1 pick (SAC score 9/10). If you just want to try 5-HTP without overthinking it, this is the bottle. It's a clean 100 mg Griffonia dose from a brand that ships at huge volume with consistent GMP quality, at a price that makes a multi-month trial cheap. You give up the cofactors and any enteric coating, and the testing is in-house rather than independently certified — but for a first, standard-strength 5-HTP, NOW is the sensible default. Start at one capsule with food.
What is the best budget option?
Natrol 5-HTP 100 mg Time Release at $13 / 90 time-release tablets. Natrol is the cheapest way into 5-HTP, and the time-release tablet is a genuine point of difference — it spreads the 100 mg out instead of delivering it in one hit, which some people find gentler. Just be clear on what time-release is and isn't: it slows the release, but it does not bypass the stomach the way Solaray's enteric coating is designed to. It's a tablet with binders, single-ingredient, house-tested. For a low-commitment first try where price is the deciding factor, it's the value budget pick.
How much do these picks cost?
Across our ranked picks, prices run from about $13 to $29 — exact price and cost per serving are listed on every pick card above.
How were these picks ranked?
5-HTP is close to a commodity — single-ingredient, almost always from Griffonia simplicifolia seed — so we ranked on the things that actually vary between bottles rather than on hype. Dose and form carries the most weight because it's the decision that changes the experience: the right strength for the buyer (100 mg to start, 200 mg only for experienced users), whether the product is genuinely enteric-coated to reduce stomach exposure, and whether it bundles the B6/C cofactors involved in converting 5-HTP to serotonin. Source and purity comes next — every clean pick is Griffonia-sourced, and we gave credit for explicit purity verification (HPLC) and clearly-documented extraction. Third-party testing is the trust filter: independent certification (Thorne) beats house/GMP testing, and batch-testing by accredited labs (Nutricost) sits in between. Value per day is the tiebreaker — cost per serving at the labeled dose. Real-world mood/sleep response — tolerability, GI comfort on an empty stomach, and how consistently users report a felt effect — settles the rest. We did NOT reward marketing 'lab verified' language that isn't an independent certification, and we did not invent any test results: where a brand only does in-house QC, we say so.
Every Claim Ranked Above Traces Back To One Of These
4 peer-reviewed sources, each linked to PubMed
- [1] Shaw 2002 (Cochrane) PMID 12169147 — Tryptophan and 5-hydroxytryptophan for depression. Systematic review of 1966-2000 literature: of 108 studies on tryptophan/5-HTP for depression, only 2 (64 patients total) met the quality bar. Pooled, they showed 5-HTP/tryptophan was better than placebo at relieving depression — but the authors stressed the evidence was insufficient and called for higher-quality trials. The honest anchor for 5-HTP's mood claim: a real signal of benefit on a thin, under-powered evidence base.
- [2] Cangiano 1992 PMID 1384305 — Eating behavior and adherence to dietary prescriptions in obese adult subjects treated with 5-hydroxytryptophan. Double-blind RCT in 20 obese subjects, 5-HTP 900 mg/day vs placebo over two 6-week periods. The 5-HTP group showed significant weight loss, reduced carbohydrate intake, and consistent early satiety, with good tolerance. A small but frequently-cited trial behind 5-HTP's appetite/weight positioning — note the high dose used.
- [3] Cangiano 1998 PMID 9705024 — Effects of oral 5-hydroxy-tryptophan on energy intake and macronutrient selection in non-insulin dependent diabetic patients. In overweight non-insulin-dependent diabetic patients, oral 5-HTP significantly decreased energy intake (mainly from reduced carbohydrate and fat) and produced weight loss over the study period. Reinforces the appetite/satiety mechanism seen in the 1992 trial, in a second small clinical population.
- [4] Ceci 1989 PMID 2468734 — The effects of oral 5-hydroxytryptophan administration on feeding behavior in obese adult female subjects. Oral 5-HTP administration to obese adult women reduced food intake and promoted early satiety versus placebo, without dietary restriction. One of the earliest controlled demonstrations of 5-HTP's effect on feeding behavior, underpinning the appetite-control use case.
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