Ingredients and actives

Postbiotics

Also written as microbiome skincare, probiotic skincare, ferment.

Inactivated bacterial cultures and their by-products, used where live probiotics would be unstable. Ferment filtrates sit in the same family and are common in Korean essences.

What it needs from a bottle

Microbiome positioning and preservative minimalism travel together, and a formula with a light preservative system needs the container to do more. Airless keeps fingers and air out. A jar undoes the whole story.

Formats that suit it

• Airless pumps
• Essence bottles