← Back
3Medicinal

Beta-sitosterol

Also sold as Sitosterol

A plant sterol used for enlarged-prostate urinary symptoms, with modest supporting evidence.

TrustedSupp Tier System™ · Tier 3Take as a defined course

Evidence strength

40/100Limited
WEAKLIMITEDMODERATESTRONGVERY STRONG

What the evidence supports: urinary symptom scores in benign prostate enlargement in older trials.

This scores how well-supported the claim above is — not how much benefit you personally would get. A high score on a narrow claim does not extend to everything the product is marketed for.

How long to take it

Course-based with reassessment.

Who it's actually for

Men with benign prostate enlargement symptoms — after a proper medical assessment.

Safe upper limit

Unverified
No formal upper limit; 60–130 mg daily for urinary symptoms in trials
Generally well tolerated. It can reduce absorption of fat-soluble nutrients like beta-carotene. People with the rare condition sitosterolaemia must avoid it.
No source or citation attached yet.

Interactions to know about

No commonly documented medication clashes in our data. That is not the same as none existing.

Run your full list through the interaction check.

Practical notes

  • Get urinary symptoms properly assessed before self-treating.
  • The supporting reviews are older; newer trials are limited.
  • Different from plant sterols taken at gram doses for cholesterol.