SL Science Holding Limited manufactures cosmetic skin care and scalp care products. The company's products include SL bio's milk-derived exosome essence, SL bio's tangerine-derived extract, and the MilkExo concentrate series. It also offers research services in armed T-cells, gamma delta T- cells, citrus reticulata (tangerine) extract, and milk-derived exosomes. SL Science Holding Limited was formerly known as SL BIO Co., Ltd. and changed its name to SL Science Holding Limited in June 2026. The company is based in Taipei, Taiwan.