Oil-free hydrating serums (water-based with humectants like glycerin or hyaluronic acid) suit very oily, acne-prone skin. Light oils like jojoba, rosehip, or squalane can benefit acne-prone skin if non-comedogenic and in low percentages (1-3%). Neem and tea tree oils offer antimicrobial benefits. Formulation depends on skin type and customer preference. A cosmetic chemist can test comedogenicity and stability of your oil choice.
Read the full guide on how to formulate a serum for acne prone skin →