Eclipta Alba Extract Grows Hair Quicker than Minoxidil
From the blog post:
Possible explanations are wedelolactone and beta-sitosterol, which are found in methanol and petroleum ether extracts but not in ethanol extracts (or, at least not in the one used in the study). Wedelolactone appears to reduce androgen receptor expression and beta-sitosterol inhibits 5-alpha-reductase. These two studies seem to indicate that they work topically as well.
From the blog post:
Shaved rats treated with the petroleum ether extract of Eclipta alba began growing new hair significantly faster than rats in the control group. Whereas the control rats took 12 days to initiate hair growth, the petroleum ether extract rats took only 5 to 6 days, with the stronger ointment being slightly more effective. The time it took to completely cover the shaved area in hair was also decreased from 24 days to 20 days.
Petroleum ether extract also increased the length of the hair follicles, similarly to minoxidil.
Conversion from telogen to anagen phase was observed in 87.5% of the mice treated with the stronger methanol extract (3.2 mg/kg) and in 50% of the rats treated with the weaker extract (1.6 mg/kg). This was evidenced by the increased number of follicles in the subcutis layer and a thickening of the skin. The total number of follicles was also increased. None of the control rats showed a similar effect.
Possible explanations are wedelolactone and beta-sitosterol, which are found in methanol and petroleum ether extracts but not in ethanol extracts (or, at least not in the one used in the study). Wedelolactone appears to reduce androgen receptor expression and beta-sitosterol inhibits 5-alpha-reductase. These two studies seem to indicate that they work topically as well.