79 citations
,
March 1999 in “The journal of investigative dermatology/Journal of investigative dermatology” Procyanidin compounds from grape seeds were found to significantly increase mouse hair growth.
37 citations
,
January 2002 in “British journal of dermatology/British journal of dermatology, Supplement” Apple extract called procyanidin B-2 was found to greatly increase hair growth.
36 citations
,
December 2002 in “Experimental dermatology” Barley extract, specifically procyanidin B-3, can promote hair growth and counteract growth inhibition.
30 citations
,
May 1999 in “Food and chemical toxicology” Procyanidin B-2 is safe to use on skin as a hair growth product.
26 citations
,
June 2001 in “PTR. Phytotherapy research/Phytotherapy research” Procyanidin B-2 lotion might help men grow thicker hair without side effects.