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Caffeine may slightly improve hair thickness if you don't have male pattern baldness. Its effectiveness is questioned, and clinical approval is uncertain.
Caffeine use after dermarolling is debated, with some users reporting positive effects on hair shedding and growth. One user recommends caffeine for reducing hair shedding and enhancing hair growth, while another is skeptical of its benefits.
Caffeine intake may increase DHT levels, but its impact on hair loss is minimal compared to genetic factors. Excessive caffeine can cause health issues, and its effects on hair loss are not directly applicable to humans based on rat studies.
Caffeine might raise stress hormones, potentially worsening hair loss. Telogen effluvium is often misattributed to minor stressors rather than significant life events.