How Coffee Affects Your Body Caffeine is a stimulant
Users often report noticeable improvements in skin radiance, reduction in dark spots, and overall complexion enhancement within weeks of consistent supplementation
Accessed August 2024 at Richard JE, Anderberg RH, Lopez-Ferreras L, et al
Research published in the Journal of International Medical Research highlights the inverse relationship between blood histamine and vitamin C status, noting that vitamin C administration can lead to a reduction in histamine levels, demonstrating that vitamin C is continuously required to keep histamine levels in check
At ACR Convergence 2025 , additional research reinforced the picture
Animal research used roughly 2-10 mcg/kg body weight orally