glutathione or kojic acid which is best I feel like such a underrated k-skincare ingredient but it's one of the most non-invasive ones Glutathione Arbutin Kojic Acid Lotion:
Description
Isolation and characterization of a novel platelet aggregation inhibitory peptide from the medicinal mushroom, Inonotus obliquus

Food and Drug Administration (FDA) regulates drugs, biologics, and medical devices
Keywords: amyotrophic lateral sclerosis (ALS), gene therapy, pharmacological treatments, potential therapeutic targets, stem cell therapy 1

doi: 10.4103/1735-5362.245962 296

It also measures the nature and speed of the conduction of electrical impulses along a nerve
