How to Choose a 5-HTP Supplement: Griffonia, Strengths, and Labels

Two 5-HTP bottles can both say 100 mg on the front and contain meaningfully different amounts of the actual compound, because some labels quote the weight of the Griffonia extract rather than the 5-HTP inside it. Add in strength choices, time-release formats, and the fact that this is a botanical extract rather than a synthesized molecule, and comparing products gets harder than it should be. Here's what to check, in order.

Why Sourcing Matters More With 5-HTP

Most single-compound supplements are produced by fermentation or chemical synthesis, which makes them highly consistent between batches. 5-HTP isn't. It's extracted from the seeds of Griffonia simplicifolia, a West African climbing shrub, and it's the only commercially viable natural source.

A plant extract is a more variable starting material than a synthesized one. Seed quality, extraction method, and purification standards all differ between manufacturers, which means who made your 5-HTP genuinely affects what's in the capsule. That's the backdrop to everything below.

Extract Weight vs Actual 5-HTP

This is the single most common source of confusion, and it's worth understanding before you compare prices.

Griffonia seed extract is standardized to a percentage of 5-HTP — commonly around 98% in quality products, though lower-grade extracts exist. A label can express its contents two ways:

What the label says	What it means	Actual 5-HTP
"5-HTP 100 mg"	100 mg of the compound itself	100 mg
"Griffonia extract 100 mg (98% 5-HTP)"	Extract weight, with standardization stated	98 mg
"Griffonia seed extract 100 mg"	Extract weight, standardization not stated	Unknown
"Proprietary calm blend 300 mg"	Combined weight of several ingredients	Unknowable

If a label states an extract weight without telling you the 5-HTP percentage, you cannot know what you're buying. That's not a small omission — it's the only number that matters.

The bottom two rows are reasons to choose a different product. A brand confident in its extract states the standardization.

Choosing a Strength

Three sizes dominate the market:

• 50 mg — the best starting point for anyone new to 5-HTP, and the easiest to build from gradually.
• 100 mg — the most common single-capsule strength, and a reasonable everyday amount for most people.
• 200 mg — a higher single serving, usually chosen by people already established at lower amounts.

A practical point that gets overlooked: a 100 mg capsule can't be halved reliably, so if you want to start lower you either need a 50 mg product or you accept starting at 100. Buying the higher strength to "grow into" is a common mistake, because nausea is the main reason people abandon 5-HTP and it's most likely at the beginning.

Full guidance on amounts is in our guide to 5-HTP dosage and timing.

Immediate vs Time-Release

Some products use a delayed or extended-release capsule designed to spread absorption across several hours rather than producing a single peak.

The argument for it: a slower release may reduce the digestive spike responsible for nausea, and it extends the window of availability.

The argument against: it costs more, the supporting research is thinner than for standard capsules, and if you're taking it in the evening for the serotonin-to-melatonin conversion, a standard capsule already aligns with that window. Standard capsules taken with food work for most people, and taking them with food addresses the same nausea problem for considerably less money.

What Else Is on the Label

Once the 5-HTP amount is clear, the rest of the ingredient list tells you about the brand:

• Proprietary blends. If 5-HTP sits inside a blend with one combined weight, walk away. You cannot dose what you cannot measure.
• Added vitamin B6. B6 is the cofactor for the 5-HTP-to-serotonin conversion, so its inclusion is rational. But check your total B6 across all supplements — excessive B6 over long periods has been associated with nerve-related side effects.
• Fillers and flow agents. Small amounts of rice flour, magnesium stearate, or silicon dioxide are ordinary. Long lists of additives in a single-ingredient product are not.
• Artificial colors and sweeteners. Unnecessary in a capsule.
• Capsule material. Gelatin is animal-derived; HPMC and pullulan are plant-based. Vegetarian and vegan buyers need this stated explicitly.
• Allergen and facility statements. Relevant if you have a serious allergy.

Testing, and Why It Matters Here Specifically

5-HTP has a history that makes independent testing more than a marketing badge.

In 1989, a contaminated batch of L-tryptophan — a related supplement — was linked to an outbreak of eosinophilia-myalgia syndrome, traced to manufacturing impurities rather than the compound itself. Trace contaminants have subsequently been reported in some 5-HTP products. Cases linked to 5-HTP specifically are rare and modern manufacturing is considerably better, but the episode is why "who made it and how was it tested" is a fair question for this ingredient in particular.

What to look for, in descending order of usefulness:

• Independent lab testing for identity, potency, and contaminants
• A certificate of analysis available on request or published by batch
• Manufacture in a cGMP-registered facility
• Non-GMO and allergen statements where relevant to you

Bellawell 5-HTP is sourced from Griffonia simplicifolia seed extract, non-GMO, lab tested, and made without artificial additives.

Comparing Cost Properly

Price per bottle tells you almost nothing, because bottles differ in both strength and count. Work it out per serving instead:

1. Find the actual 5-HTP per capsule — not the extract weight, using the table above.
2. Multiply by the capsule count to get total 5-HTP in the bottle.
3. Divide the price by the capsule count for cost per serving.
4. Sanity-check the daily cost at the amount you actually intend to take.
5. Factor in whether you'll finish it. A cheap bottle you abandon after a week because you started at 200 mg is the most expensive option available.

Red Flags

• Claims to treat, cure, or prevent any condition. A supplement making medical claims is either misinformed or dishonest, and neither is a good sign about what's in the bottle.
• "Pharmaceutical grade." Not a defined regulatory term for supplements in the US. It means whatever the brand wants.
• No stated Griffonia source. There is no other meaningful source of 5-HTP. If a label won't say it, ask why.
• Extract weight with no standardization percentage. Covered above — the most consequential omission on a 5-HTP label.
• Mega-strengths well above 200 mg per capsule. More isn't better with this compound, and it removes your ability to start low.
• Before-and-after imagery or weight-loss framing. The evidence doesn't support it, and the marketing tells you what the brand prioritises.

A Two-Minute Checklist

1. Does the label state Griffonia simplicifolia as the source?
2. Is the 5-HTP amount stated as the compound, or as extract weight with a standardization percentage?
3. Is the strength one you can start sensibly with — ideally 50 or 100 mg?
4. Is it free of proprietary blends?
5. Is the capsule material stated, and does it suit you?
6. Is there evidence of independent testing?
7. What does one serving actually cost at your intended amount?

Before You Buy

One thing matters more than any of the above. 5-HTP affects serotonin, and it should not be combined with antidepressants or other serotonergic medications unless your prescriber has said it's appropriate.

Please read our article on 5-HTP side effects and who should avoid it before buying anything. If you're new to the compound, our explainer on what 5-HTP is covers how it works.

FAQ

What's the difference between 5-HTP and Griffonia extract?

Griffonia extract is the raw material; 5-HTP is the compound within it. A quality extract is standardized to around 98% 5-HTP, but a label quoting extract weight without stating the percentage leaves you guessing.

Should I buy 50 mg or 100 mg?

50 mg if you're new to it, since starting low is how you avoid the nausea that makes most people quit. 100 mg is a reasonable everyday strength once you know how you respond.

Is time-release 5-HTP worth the extra cost?

For most people, no. Taking a standard capsule with food addresses the same digestive issue, and evening dosing already aligns with the body's melatonin conversion window.

Does 5-HTP need vitamin B6?

B6 is the cofactor for the conversion, so adequate B6 status matters — but most people eating a reasonable diet already have enough. If you choose a combination product, check your total B6 across everything you take.

Is 5-HTP vegan?

The compound itself is plant-derived, extracted from Griffonia seeds. Whether a given product is vegan depends on the capsule shell — gelatin is animal-derived, HPMC and pullulan are not.

What does "lab tested" actually mean?

It should mean independent verification of identity, potency, and contaminants. Since the phrase isn't regulated, a brand that can produce a certificate of analysis is telling you something a brand that only uses the phrase is not.