Customer reviews
UnavailableiHerb
No matching customer rating is available.
5-HTP
120 Capsules
Explore this product’s ingredients, label details, and available ratings.
- Label serving
- 1 Capsule
- Servings per container
- 120
- Form
- capsule
This page covers the package shown. Different sizes and formulations are kept separate.
Comparison Score
Balanced Weights
How the Score Works
Not Enough Data to Score
The selected factors do not have recorded values yet.
Missing from this score: iHerb, SuppCo’s product rating, and NSF product certification.
Source ratings do not establish product safety or effectiveness.
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Adjust importance from 0 (ignore) to 5 (most important). We balance the percentages for you.
Third-party assessment
UnavailableSuppCo’s product rating
No numeric assessment is available.
Company Disclosure, Certification & Availability 5 factors
These are preferences, not clinical evidence. Disclosure factors start at zero weight. Third-party assessments may already include these factors, so you can choose whether to count them again.
Certification
UnknownNSF product certification
Unknown. An exact-product certification has not been independently verified for this page.
Verified: 100 · Confirmed not certified: 0 · Unknown: excluded. This records certification status only.
About NSF certification ↗Shopping preference
UnknownRetailer availability
Current retailer coverage has not been checked. Availability and exclusivity are unknown.
Optional: 1 retailer = 33, 2 = 67, 3 or more = 100. This is a disclosed shopping preference, not proof of quality.
Retailer information ↓Company transparency
Not yet checkedManufacturer disclosure
The available archive does not establish this role. Full packaging disclosure has not been checked.
Identified: 100 · Not disclosed on reviewed packaging: 0 · Not yet checked: excluded. This measures disclosure, not product quality or legal compliance.
View company roles ↓Company transparency
Not yet checkedPacker disclosure
The available archive does not establish this role. Full packaging disclosure has not been checked.
Identified: 100 · Not disclosed on reviewed packaging: 0 · Not yet checked: excluded. This measures disclosure, not product quality or legal compliance.
View company roles ↓Company transparency
Not yet checkedDistributor disclosure
The available archive does not establish this role. Full packaging disclosure has not been checked.
Identified: 100 · Not disclosed on reviewed packaging: 0 · Not yet checked: excluded. This measures disclosure, not product quality or legal compliance.
View company roles ↓“Found at one retailer” means one among the stores checked for this product and region. An Amazon-only listing does not, by itself, establish poor quality.
Weights apply to this comparison.
Calculation Details
Coverage of Selected Weights0%
0 of 9 selected weight points have data. Missing values are excluded, not scored zero. This is not a measure of scientific confidence.
Each rating keeps its original scale and is also converted to 0–100: 4.4 / 5 becomes 88; 8.2 / 10 becomes 82. This puts numbers on one scale, but does not make different rating methods equivalent.
Your score = sum of (normalized value × your weight) ÷ sum of weights with data.
| Input | Out of 100 | Weight | Score points |
|---|---|---|---|
| iHerb | Unknown | 3 | Excluded |
| SuppCo’s product rating | Unknown | 4 | Excluded |
| NSF product certification | Unknown | 2 | Excluded |
| Retailer availability | Unknown | 0 | Excluded |
| Manufacturer disclosure | Unknown | 0 | Excluded |
| Packer disclosure | Unknown | 0 | Excluded |
| Distributor disclosure | Unknown | 0 | Excluded |
- Unknown is not false. Missing data is excluded from the score and lowers data coverage when you give it weight.
- Disclosure counts named roles, not the number of separate companies. One company can satisfy several roles only when the evidence supports each role.
- Coverage describes available inputs, not scientific confidence. Scores with different missing inputs may not be comparable.
- Review counts are shown for context. They do not automatically increase a retailer's influence. Sources may share reviews.
- Recall notices and interaction information stay separate. They cannot be averaged away by a high customer rating.
- Only matching product and formula records should be combined. A label redesign alone does not reset ratings; a formula change requires matching the evidence again.
Method preference-v1 · Source ratings are historical observations. They are not live ratings or independent verification by SupplementSafety. Original rating values remain visible when preferences change. Your weights are saved only in this browser when storage is available.
WHAT'S IN THE BOTTLE
Label & Ingredients
Supplement Facts
Serving size: 1 CapsuleServings per container: 120
Amount per serving% Daily Value
Vitamin B610 mgas Pyridoxine Hydrochloride
Not recordedVitamin C60 mgas Calcium Ascorbate
Not recordedL-5-Hydroxytryptophan50 mgas Griffonia simplicifolia
Not recordedDaily Values marked “Not recorded” are unavailable in the imported record.
Archived product information.
Other ingredients
Vegetable Cellulose, Gelatin, Vegetable Magnesium Stearate, Silica
Formula & label version
Label image not recorded
This version covers 120 capsules. View packaging and label history →
Details reflect the archived product version. Check the label on your own package.
Ingredient Guides & Interactions
Explore published references related to the ingredients listed on this product. Each article explains the forms, doses, and evidence it covers; these are ingredient references, not a review of this finished product.
Interactions With Medications
Selected by ingredient match, not ranked by risk. This is not a complete interaction check.
Related ingredient: L-5-Hydroxytryptophan
Can I take L-5-HTP with Amoxapine?
Do not self-start L-5-HTP with amoxapine. Official L-5-HTP guidance advises against combining it with antidepressants, even though the exact pair’s clinical risk is not quantified.
Scope: Concentrated oral L-5-hydroxytryptophan, not L-tryptophan or whole Griffonia seed.
Read Interaction Article & Sources →Related ingredient: Vitamin C
Can I take Vitamin C with Aspirin?
Short studies in healthy people suggest that repeated higher-dose aspirin can affect gastric or measured vitamin C status, and vitamin C changed some gastric or duodenal injury measures. These findings support considering adequate intake in people with poor intake or repeated higher-dose exposure. They do not establish clinical vitamin C deficiency, routine testing, megadose treatment, or prevention of major bleeding or ulcers.
Scope: Evidence is short-term and mostly higher-dose aspirin. It does not establish a vitamin C requirement for all 81 mg or 100 mg aspirin users.
Read Interaction Article & Sources →Related ingredient: L-5-Hydroxytryptophan
Can I take L-5-HTP with Butorphanol?
5-HTP may create a serotonin-related concern with butorphanol, but a direct combination study or well-documented case was not established. Review co-use with the prescriber instead of assuming either proven toxicity or safety.
Scope: Oral L-5-hydroxytryptophan supplements; not ordinary dietary protein.
Read Interaction Article & Sources →View More Related Interaction Articles
- Can I take L-5-HTP with Carbinoxamine?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Clorazepate?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Codeine?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Desipramine?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Dextromethorphan?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Fentanyl?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Fluoxetine?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Hydromorphone?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Imipramine?L-5-Hydroxytryptophan
- Can I take Vitamin C with Levothyroxine?Vitamin C
- Can I take L-5-HTP with Lithium Citrate?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Lofexidine?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Meclizine?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Metaxalone?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Methadone?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Methamphetamine?L-5-Hydroxytryptophan
- Can I take Vitamin C with Methamphetamine?Vitamin C
- Can I take L-5-HTP with Mirtazapine?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Nortriptyline?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Perphenazine?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Phenelzine?L-5-Hydroxytryptophan
- Can I take Vitamin B6 with Phenelzine?Vitamin B6
- Can I take Vitamin B6 with Phenobarbital?Vitamin B6
- Can I take Vitamin B6 with Phenytoin?Vitamin B6
- Can I take L-5-HTP with Tapentadol?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Thiothixene?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Tramadol?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Tranylcypromine?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Trazodone?L-5-Hydroxytryptophan
- Can I take L-5-HTP with Trimipramine?L-5-Hydroxytryptophan
Supplement Guides
Related ingredients: Vitamin B6, Vitamin C
Multi-Vitamin/Mineral Supplements
Explore uses, forms, amounts, and precautions for the ingredients and preparations covered by this guide.
Health Canada · Oral · Source version: June 26, 2026
Read Supplement Guide →Related ingredient: L-5-Hydroxytryptophan
5-HTP
Explore uses, forms, amounts, and precautions for the ingredients and preparations covered by this guide.
Preparations covered: Part(s): Seed; Part(s): N/A; Part(s): Whole cell for biosynthesis. Compare these with your product’s label.
Health Canada · Oral · Source version: August 28, 2024
Read Supplement Guide →View More Related Supplement Guides
- AntioxidantsVitamin C
- Cognitive Function ProductsL-5-Hydroxytryptophan
- Joint Health ProductsVitamin C
Packaging & Label History
Packaging can change while the formula stays the same. Front images and label images are tracked separately.
Front Packaging
First archived front image
First observed: May 18, 2026
Last observed: May 18, 2026120 Capsules · 1 Capsule
Dates come from image retrievals recorded in the source archive. They are not a product launch date or proof of current availability.
Label Images
No dated image observation is recorded for this view.
A changed image file is recorded as a new observation. “New look,” packaging redesign, and formulation changes require supporting evidence; none is established merely by a different image.
Brand & Company
Who Makes, Packs & Distributes It?
One company may fill several roles. We identify each role separately from the available evidence.
Manufacturer
Not yet checkedThe available archive does not establish this role. Full packaging disclosure has not been checked.
Packer
Not yet checkedThe available archive does not establish this role. Full packaging disclosure has not been checked.
Distributor
Not yet checkedThe available archive does not establish this role. Full packaging disclosure has not been checked.
A business identifier confirms which company a record refers to; it does not establish what work that company performs for this product.
How Label Disclosure Affects Your Score
Our transparency standard: We prioritize the ability to identify who manufactures and packs a product. The Transparency First preset gives these disclosures greater weight than customer ratings. This is our comparison preference, not an estimate of adulteration risk.
Manufacturer, packer, and distributor disclosure can each receive a weight in your comparison score. Identified roles score 100; a role confirmed as not disclosed on reviewed packaging scores 0. A role we have not checked stays Unknown and is excluded.
U.S. labeling rules require a named manufacturer, packer, or distributor, not disclosure of all three. An unqualified company name can indicate the manufacturer under the rule; it does not establish the packer or distributor. “Manufactured for” and “distributed by” describe different relationships.
This is a transparency preference, not a safety rating or a finding of noncompliance. It does not establish what information a regulator holds.
Read the U.S. labeling rule ↗FDA does not approve dietary supplements before they are marketed. Manufacturers and distributors are responsible for their products’ safety and compliance. FDA’s explanation ↗
A name search is not confirmation of a recall or a company match. Business identifiers and private contact details are not displayed.
Retailer Information
Historical listingMarket status: Current availability not checked
Current retailer listings have not been checked for this product.
A long gap in sale observations can flag a product for checking. It does not establish discontinuation without a supporting source.
Current prices and retailer availability have not been verified.
Testing & Certifications
No exact-product certification or batch-specific laboratory report has been independently verified for this page. Certification therefore remains Unknown in the score controls.