Scalp micropigmentation (SMP) for hair loss, scars and hair transplantation: what it can and cannot achieve. An evidence-based guide for patients

Guide No. 3 of the INM patient guide series (Instituto Nacional de Micropigmentación, Madrid). Evidence-based information on what scalp micropigmentation (SMP) can and cannot achieve in alopecia, scars of the scalp and hair transplantation: situations of use, timelines, number of sessions, duration, risks, traceability of pigments, and questions to ask at the consultation. Narrative review of the biomedical literature with verification of every reference by DOI, PMID or PMCID. Educational document; preprint, not peer-reviewed. English version. Spanish version: 10.5281/zenodo.23728457. Other guides and articles in the INM series (DOI, Spanish/English): areolas 10.5281/zenodo.22847037 / 10.5281/zenodo.22836221; scars 10.5281/zenodo.22860131 / 10.5281/zenodo.22659740; SMP and hair transplantation 10.5281/zenodo.22966120 / 10.5281/zenodo.22966996; patient guide No. 1 10.5281/zenodo.23124086 / 10.5281/zenodo.23124493; patient guide No. 2 10.5281/zenodo.23439426 / 10.5281/zenodo.23439835.