Yes, 2% kojic acid is generally safe for daily use, but it depends on how your skin responds
Some people notice a shift in their energy or mental clarity within a few days, while for others, it may take several weeks of consistent use
Eur Psychiatry 65:S5545555 Dawoud NM, Rajab AZ, El-Hefnawy SM, El-Bayoumy AM, Salem AM, Seleit I (2023) Serum brain-derived neurotrophic factor and vitamin D: two concordant players controlling depression among alopecia areata and vitiligo patients: a case-control study
B., Zurbau, A., de Souza, R