Blueberries and Hair
Many Japanese research companies are now examining hundreds of different plant chemicals (phytochemicals) trying to determine if any of these chemicals could influence hair growth. Some of these companies have discovered that proanthocyanidins found in blueberries, grape seeds, grape skins, cranberries, and green tea caused hair follicle cells to proliferate much faster than usual - sometimes 200% faster. These proanthocyanidins also stimulated hair follicles in the resting stage of the hair cycle (telogen) to enter into the growing stage (anagen) at an accelerated rate.
Some of these Japanese scientists speculated that the hair-cycle converting process was similar to that of minoxidil - Rogaine. These scientists also speculate that proanthocyanidins may help people with prostate problems, improve VEGF production, stimulate collagen formation, and help the skin to cope with the sun - a sun-screen effect.
Proanthocyanidins are in the family of flavinoids, a group of phytochemicals rich in antioxidants. They are highly bioavailable in the foods that contain them. It's just a matter of time, though, till the "active ingredients" of these brightly colored fruits will be put in a bottle and sold as supplements.
Other fruits that contain proanthocyanidins are strawberries, raspberries, pomegranates, and apples. But blueberries, especially wild ones, have the highest amounts of this plant chemical.