22 citations
,
December 1991 in “PubMed” 46 citations
,
February 1983 in “The Journal of Dermatology” Hair regrowth slows with age due to changes in enzyme activity.
16 citations
,
January 1980 in “Planta Medica” Some natural extracts and one hair tonic can promote hair growth in mice.
358 citations
,
January 1968 in “Physiological Reviews” Histamine plays key roles in immune responses, stomach acid, and brain signals.
521 citations
,
January 1954 in “Physiological Reviews” Hair growth is cyclic and influenced mainly by local factors.