Supplement

Nicotinamide (vitamin B3)

Supplement.

How to take it

There is no established standard dose for this case; it is advisable to consult a professional.

Effect by goal · level of evidence

Prevention of non-melanoma skin cancer

reduces Very high study (A)

23%

Phase 3 trial (386 high-risk people): nicotinamide 500 mg twice a day for one year reduced new non-melanoma skin cancers (basal cell and squamous cell) and actinic keratoses by ~23%. Inexpensive and safe in people with a history of these cancers.

View the study (study) →

In depth

Supplement · Highest evidence: Very high · 1 finding

Findings

Prevention of non-melanoma skin cancer — reduces (Very high, study). Phase 3 trial (386 high-risk people): nicotinamide 500 mg twice a day for one year reduced new non-melanoma skin cancers (basal cell and squamous cell) and actinic keratoses by ~23%. Inexpensive and safe in people with a history of these cancers. 26488693

Information, not medical advice. Prescription drugs require a doctor.

Information, not medical advice. Scientific evidence reflects the quality of the studies.