- Reaction score
- 95
'Seasonality of hair shedding in healthy women complaining of hair loss
[...]Results: After exclusion of patients with a disease or on drugs known to cause hair loss, 823 women remained. Analysis of trichograms demonstrated annual periodicity in the growth and shedding of hair, manifested by a maximal proportion of telogen hairs in summer. A second peak seems to exist, though it is less pronounced, in spring. The telogen rates were lowest in late winter.'
Seasonality of hair shedding in healthy women complaining of hair loss - PubMed
These results confirm the findings of former authors who have indicated seasonal changes in human hair growth, though this is the first study performed systematically in a representative number of women.
pubmed.ncbi.nlm.nih.gov