Aspen

BotanicalBest with a meal

What is it

Aspen (Populus tremula and related species) is a deciduous tree. Its bark and leaves contain salicin and related salicylates and are used in traditional herbal medicine for pain, fever, and inflammation. Aspen is also a Bach Flower remedy.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Pain / inflammation

Mixed Evidence

Direct human evidence for aspen bark is limited. Salicin-containing barks (mainly willow) have modest evidence for back pain.

How it works

Aspen bark contains salicin glycosides similar to those in willow bark. Salicin is metabolized to salicylic acid, the active analgesic and anti-inflammatory metabolite related to aspirin. Studies of willow bark show modest benefit for low back pain and osteoarthritis; aspen bark is much less studied but plausibly shares similar activity. Bach Flower preparations use infinitesimal dilutions and have no pharmacological activity; effects are attributed to non-specific or placebo mechanisms.

Dosage

No standardized dose for aspen bark. Willow bark (similar compounds) doses are 120-240 mg salicin/day. Bach Flower aspen is taken as drops.

When and how to take it

Take with food to minimize GI upset.

1 commercial form

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

Bark extract / Bach Flower remedy

Two very different products despite shared name.

Bark extract: salicin converted to salicylic acid; Bach Flower: no pharmacological action.

Safety

Salicylate content means people with aspirin allergy or salicylate sensitivity should avoid. Standard salicylate cautions (Reye's syndrome in children with viral illness) apply.

Who should be cautious

Avoid in salicylate/aspirin allergy. Avoid in children with viral illness (Reye's syndrome risk). Avoid in pregnancy (especially third trimester) and lactation. Use cautiously with anticoagulants.

Interactions

Theoretical interactions with anticoagulants (warfarin), antiplatelets (aspirin, clopidogrel), and methotrexate. Possible additive effects with other NSAIDs.

Food sources

Not a food source

Amount
N/A
%DV
—

Frequently asked questions

Is aspen bark the same as aspirin?⌄

Related, not identical. Aspen and willow barks contain salicin, a precursor to salicylic acid. Aspirin (acetylsalicylic acid) is a related but distinct synthetic compound.

References

Aspen on Wikidata — Wikidata link

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

Research on Aspen (PubMed search) — PubMed link

Track Aspen with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

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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.