July 2012 in “EFSA supporting publications” The EFSA maintained its view that spermidine's effect on hair growth is related to disease treatment and does not meet the health claim criteria.
3 citations
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June 2011 in “EFSA Journal” Spermidine's effect on hair growth is not proven.
8 citations
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October 2017 in “Dermatology practical & conceptual” A spermidine-based supplement may help hair grow longer by keeping it in the growth phase.
January 2025 in “MEDS Public Health and Preventive Medicine” Spermidine supplements can help extend the hair growth phase and may be useful for treating hair loss.
61 citations
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July 2011 in “PLOS ONE” Spermidine may help reduce hair loss and deserves further testing as a treatment.