Actives Booster
Actives Booster — a concentrated treatment product that delivers a high dose of one or a few functional ingredients, such as vitamin C, niacinamide, or exfoliating acids, to target a specific concern. It is typically layered under a moisturizer or mixed into an existing routine to reinforce results without replacing core steps.
Key points
- Boosters are formulated at higher active concentrations than typical serums or creams, so they are usually applied in small amounts.
- They are designed to address a defined goal like brightening, texture, or firmness rather than acting as an all-purpose product.
- Most boosters are layered onto clean skin before heavier occlusive steps such as moisturizer or oil.
- Introducing one booster at a time helps identify tolerance and avoid over-exfoliation or irritation from stacking multiple actives.
Frequently asked
When should I apply an actives booster in my routine?
Boosters are generally applied after cleansing and any watery toners but before moisturizer, so the active can reach skin before occlusive layers seal it in.
Can I use more than one booster at a time?
It is possible, but combining several high-strength actives raises the risk of irritation, so many people alternate them across days or times of day.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
