Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
Ammonium Persulfate is an effective hair bleach but can cause severe skin and respiratory irritation; it is not recommended for sensitive individuals or at-home use without precautions.
Irritation
high
Source
synthetic
Magnesium peroxide releases oxygen to help kill bacteria and whiten skin, but it can be irritating and is rarely used in modern leave-on skincare.
Irritation
moderate
Source
synthetic
Potassium Caroate is a strong oxidizer used for bleaching and antimicrobial effects, but it can be irritating and is not common in everyday skincare.
Irritation
high
Source
synthetic
Potassium monopersulfate is a strong oxidizer used mainly in hair lightening and disinfectant products; it is not a typical skincare ingredient and can be irritating.
Irritation
high
Source
synthetic
Potassium Persulfate is a strong oxidizer used in hair bleach; it can cause skin and eye irritation and is not suitable for everyday skincare.
Irritation
high
Source
synthetic
Sodium perborate is an effective bleaching and antimicrobial agent, but its use in skincare is limited due to potential irritation and safety concerns.
Irritation
moderate
Source
synthetic
Sodium persulfate is a powerful oxidizer used mainly in hair bleach, but it can cause skin and respiratory irritation and is not recommended for leave-on skincare.
Irritation
high
Source
synthetic
A strong oxidizing agent used in hair bleaching that can be irritating; not common in everyday skincare.
Irritation
high
Source
synthetic