Cornstarch is utilized in cosmetics and personal care products. It is used as an absorbent, which aids in cleansing the face.
Rich in amylose and amylopectin.
ABSORBENT PROPERTIES
Cornstarch is sebum-absorbent and does not directly induce dryness, so it is not problematic if applied to dry skin. It is incorporated into cosmetic products promoted to reduce “oily skin”. Therefore, it reduces skin shininess and surface sebum level on the skin.
Cornstarch is safe to be used in cosmetic practice.
https://online.personalcarecouncil.org/ctfa-static/online/lists/cir-pdfs/PRS282.pdf