Tag: Particle Size Safety

Natural soap exfoliants promise “gentle polishing,” “smooth skin,” and “deep cleansing”—but walnut shells and apricot kernels cause microscopic tears, while chemical AHAs in rinse-off soap deliver 1/100th the concentration of effective leave-on treatments. What actually works? In this evidence-based pillar guide, we introduce the particle-size safety framework: face requires 500 µm. We examine why colloidal…