Verified
“100 mg 5-HTP enhanced with vitamins B6 and C.”
Matches the label: 100 mg 5-HTP from Griffonia plus added vitamin B6 and vitamin C. The 'enhanced with' framing accurately describes the cofactor addition over plain 5-HTP.
Reviewed
Verified by SAC team
+10
XP on completion
Best with cofactors
Doctor's Best · 100 mg 5-HTP + vitamin B6 & C · 120 veg capsules
Doctor's Best 5-HTP Enhanced with Vitamins B6 & C Review
9.1/10SAC Product Score™
Doctor's Best 5-HTP takes the standard 100 mg Griffonia dose and does one smart, cheap thing with it: adds the vitamin B6 and C cofactors involved in converting 5-HTP into serotonin. That makes it the most complete value pick on the list — for roughly the same price as a single-ingredient bottle, the conversion pathway isn't left cofactor-limited. In a category where most products are bare 5-HTP, that small addition is enough to make this arguably the smartest cheap buy. It's not perfect: it isn't enteric-coated, so the nausea-prone may still prefer Solaray (#5), and the testing is in-house rather than independently certified like Thorne (#6). And the universal 5-HTP rule applies in full — it raises serotonin, so it must not be combined with antidepressants (SSRIs/SNRIs), MAOIs, triptans, or other serotonergic drugs without a clinician's sign-off. Start at one capsule with food, and here's the full breakdown.
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Read the complete 5-HTP guide →How we built the SAC Product Score™ — 9.1/10
Dose & form (enteric / cofactors)30%9.5/10
The standout axis: a correct 100 mg starting dose plus vitamin B6 and C, the cofactors involved in decarboxylating 5-HTP to serotonin. That's the most complete formulation among the value picks. Held just short of the top only because it isn't enteric-coated — the one form tweak Solaray (#5) has that this lacks.
Source & purity (Griffonia)25%9/10
Griffonia simplicifolia-sourced 5-HTP in a vegan, Non-GMO, gluten-free and soy-free capsule — the standard clean source and formulation. Solid and exactly what you want; no explicit HPLC callout like Jarrow, but a clean, well-documented source.
Third-party testing20%7.5/10
House/GMP testing from an established value brand. Reliable, but not independent third-party certification — the bar Thorne (#6) clears. This is the axis that keeps Doctor's Best from challenging the testing-forward picks despite its strong formulation and value.
Value per day15%10/10
Roughly $0.17 per capsule across 120 capsules — top value on the list, and you get the B6/C cofactors at that price. Effectively the cheapest cofactored 5-HTP available, which is the core of its argument.
Real-world mood/sleep response10%8.5/10
Well-tolerated, with the usual mild-nausea-on-empty-stomach caveat softened by taking it with food. The cofactors are a reassuring extra rather than a dramatic difference-maker. Felt response is individual and the evidence base is modest, so we keep this measured.
The product at a glance
- Active
- 100 mg 5-HTP (1 capsule)
- Source
- Griffonia simplicifolia seed extract
- Cofactors
- Vitamin B6 + vitamin C
- Coating
- Not enteric-coated
- Count
- 120 veg capsules
- Cost
- $20 / bottle = ~$0.17 per 100 mg capsule
- Testing
- House/GMP testing
- Best for
- Value buyers who want the conversion cofactors built in
- Safety
- Do not combine with SSRIs/SNRIs, MAOIs, triptans or other serotonergic drugs
Marketing claims vs. reality
Verified
“B6 and C support the conversion of 5-HTP to serotonin.”
Mechanistically sound — vitamin B6 is a cofactor for the aromatic amino acid decarboxylase that converts 5-HTP to serotonin, and vitamin C participates in monoamine synthesis. The doses are supportive rather than therapeutic, but the directional claim is correct.
Partial
“Supports a healthy mood and a calm, relaxed state.”
There's a real but modest basis via the serotonin-precursor mechanism; the best mood evidence (Shaw 2002, PMID 12169147) showed a signal of benefit on a thin study base. Reasonable as a supportive claim, overstated if read as a proven mood treatment.
Verified
“Vegan, Non-GMO, gluten-free and soy-free.”
Consistent with the product labeling — a vegan capsule that is Non-GMO, gluten-free and soy-free. Formulation facts that match the listing.
What our test actually found
01The cofactors are the whole point — and they're nearly free here
What separates this from plain 5-HTP is the vitamin B6 and C, which feed the enzymatic conversion of 5-HTP to serotonin. The doses are modest and supportive, not a second therapy, but they ensure the pathway isn't cofactor-limited — and you get them at essentially the same price as a single-ingredient bottle. That 'cofactors for the same money' math is the core reason this can be the smarter buy than NOW (#1).
02Value matches the best on the list
At roughly $0.17 per capsule across 120 capsules, Doctor's Best is tied for the best cost-per-serving among 100 mg products — and it's the cheapest cofactored option. Since 5-HTP needs weeks of consistent use to evaluate, a large, cheap bottle makes a fair trial affordable. On pure value it goes toe-to-toe with NOW, with the cofactors as the tiebreaker.
03Still not enteric-coated — the one feature it lacks
The cofactors are a plus, but the form is still a plain capsule: no enteric coating to carry the dose past stomach acid. For most people that's fine with food, but the nausea-prone should know that Solaray (#5) is the one genuinely enteric-coated pick — and it also includes B6 and C. If GI tolerance is your concern, Solaray beats this on the form axis even though it costs more per capsule and comes in a smaller bottle.
04Testing is in-house — fine for most, not for the testing-maximalist
Doctor's Best is an established value brand with house/GMP QC, which is reliable but not independent certification. If you specifically want an outside lab to verify the label, Thorne (#6) is the certified option. For the value buyer this is a non-issue; it only matters if third-party testing sits at the top of your priority list.
05The safety caveat is unchanged by the cofactors
Adding B6 and C does nothing to soften the core rule: 5-HTP raises serotonin and must not be combined with antidepressants (SSRIs/SNRIs), MAOIs, triptans, tramadol, or other serotonergic drugs without a clinician's sign-off, because of serotonin-syndrome risk. If you take any of those or have a medical condition, clear it with your doctor first. This applies to every 5-HTP, cofactored or not.
Pros & cons, no sugar-coating
Pros
- Adds vitamin B6 and C — the cofactors in the 5-HTP-to-serotonin conversion — over plain 5-HTP
- Top-tier value: 120 capsules at one of the lowest prices on the list (~$0.17 each)
- Standard 100 mg starting dose from a clean Griffonia source
- Vegan, Non-GMO, gluten-free and soy-free
- Arguably the smartest cheap buy in the category
Cons
- Not enteric-coated — Solaray (#5) is the gentler option for sensitive stomachs
- Cofactor doses are modest (supportive, not therapeutic)
- House/GMP testing only, not independently third-party certified
The cofactored value pick — the smartest cheap 5-HTP for most buyers.
Doctor's Best earns its spot by doing the obvious smart thing: taking a clean 100 mg Griffonia dose and adding the vitamin B6 and C cofactors that feed its conversion to serotonin — at one of the lowest prices on the list. If you were going to buy plain 5-HTP anyway, this gives you the conversion pathway fully fed for essentially the same money, which is why for many buyers it edges out the bare-bones NOW (#1). The reasons to look elsewhere are specific. If 5-HTP upsets your stomach, Solaray (#5) is the only genuinely enteric-coated option (and also has the cofactors). If independent third-party certification is your priority, Thorne (#6). If you want the shortest possible ingredient list, Pure Encapsulations (#3). And for everyone, the non-negotiable: do not combine 5-HTP with antidepressants or other serotonergic drugs without a clinician's sign-off. Start at one capsule with food, give it a few weeks, and treat it as the low-cost, cofactored experiment it is.
Check Doctor's Best · 100 mg 5-HTP + vitamin B6 & C · 120 veg capsules on AmazonIf this doesn’t fit — try these
NOW Supplements 5-HTP 100 mg
9.4/10The bare-bones single-ingredient default at the same value tier — no cofactors, but the simplest clean 100 mg dose. Pick it if you want maximum simplicity over the B6/C addition.
See it on the list →Solaray 5-HTP Enteric Coated
8.3/10Also includes B6 and C, but inside the only genuinely enteric-coated capsule on the list — the better choice if plain 5-HTP upsets your stomach.
See it on the list →Thorne 5-HTP
8.1/10The third-party-certified option with B6, for buyers who want an independent lab to confirm the label over raw value.
See it on the list →Sources & further reading
- Shaw 2002 (Cochrane)Shaw K, Turner J, Del Mar C · 2002 · Cochrane Database of Systematic Reviews · PMID 12169147
Tryptophan and 5-hydroxytryptophan for depression
Of 108 studies on 5-HTP/tryptophan for depression, only 2 met the quality bar; pooled they favored 5-HTP/tryptophan over placebo, but the authors stressed the evidence was insufficient. The honest anchor for the mood claim.
- Cangiano 1992Cangiano C, Ceci F, Cascino A, et al. · 1992 · The American Journal of Clinical Nutrition · PMID 1384305
Eating behavior and adherence to dietary prescriptions in obese adult subjects treated with 5-hydroxytryptophan
Double-blind RCT, 20 obese subjects, 5-HTP 900 mg/day: significant weight loss, reduced carbohydrate intake, early satiety. Behind the appetite/weight use case — small study, high dose.
- Cangiano 1998Cangiano C, Laviano A, Del Ben M, et al. · 1998 · International Journal of Obesity and Related Metabolic Disorders · PMID 9705024
Effects of oral 5-hydroxy-tryptophan on energy intake and macronutrient selection in non-insulin dependent diabetic patients
In overweight NIDDM patients, oral 5-HTP decreased energy intake and produced weight loss. Reinforces the appetite/satiety mechanism in a second small clinical population.
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