YSK about the app Yuka which lets you scan food and cosmetics to identify harmful chemicals or additives ( yuka.io )
The app gives a score out of 100 for each product scanned based on how healthy or harmful it may be and offers alternative products which may be healthier. The developers do not sell ads or user data and have a no influence policy which prevents brands from paying to place their products in the app. There is a premium version...