Use cosmetic products in moderation.
Refrain from using products that are highly scented.
Avoid mixing products like creams or shampoos before you use them.
Choose products that mention the ingredients and how you should use them.
Avoid sharing makeup brushes and applicators with anyone.
Check expiry dates before you buy or use a product.
If you are allergic to an ingredient and you know about it, eliminate products that contain such an ingredient from your cosmetic box.