John Haigh believed he had concocted the "perfect murder," until forensic science caught up to him in 1949 Sean Neumann is a reporter at PEOPLE. He has been working at PEOPLE since 2019.

Glycolic acid is a substance that chemically exfoliates a person’s skin by dissolving dead skin cells and oils. Glycolic acid may also help boost collagen production, and support skin moisture.

Milk exosomes are evolutionarily conserved nanovesicles naturally contained in milk. Recent studies have shown that milk exosomes can withstand the harsh acid–base environment in the gastrointestinal ...