Benzoin siam

Botanical

What is it

Siam benzoin is a balsamic resin obtained from Styrax tonkinensis (Siamese benzoin tree), used for centuries in incense, fragrance, and traditional medicine. It is also a pharmacopeial ingredient in compound benzoin tincture, used as a skin protectant and inhalation aid.

Evidence for 1 use

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Skin protectant (compound benzoin tincture)

Strong Evidence

Compound benzoin tincture is a long-established topical skin protectant in clinical and home use.

How it works

The resin contains benzoic acid, coniferyl benzoate, vanillin, and other aromatic compounds. As an inhalation it adds a balsamic vapor used historically for respiratory comfort. As compound benzoin tincture it is applied topically to support skin protection under bandages. There is little evidence for internal oral use as a dietary supplement; most accepted uses are topical or inhaled.

Dosage

DSLD does not list a single standardized oral dose. Inhalation and topical doses follow product directions. No RDA exists.

When and how to take it

Topical and inhalation use is per label. No oral timing applies for typical uses.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Compound benzoin tincture

Used to protect skin and help adhesives stick.

Topical only

Inhalation balsam

Used historically in steam inhalation for respiratory comfort.

Aromatic vapor

Safety

Topical compound benzoin tincture is generally well tolerated; allergic contact dermatitis can occur. Inhalation of high concentrations may irritate respiratory passages. Oral safety data for supplement use are limited.

Who should be cautious

Avoid topical use on broken or infected skin without clinician guidance. Avoid in known benzoin allergy. Inhalation in young children may cause irritation; use caution.

Interactions

No significant drug interactions reported at typical topical or inhaled use.

Frequently asked questions

Is benzoin safe to eat?⌄

It is not generally intended as an oral supplement. Most legitimate uses are topical or inhaled.

Is Siam benzoin the same as Sumatra benzoin?⌄

Both are types of benzoin resin but from different Styrax species, with slightly different aroma profiles and uses.

References

Benzoin siam on Wikidata — Wikidata link

Benzoin siam on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Benzoin siam (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.