82Excellent
Ingredient Safety75
Quality76
Contaminants100
Transparency88
Zena Nutrition
Liquid Collagen + Biotin
supplementssingle vitamins0860002992501
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Flagged concerns
natural flavor
Vague term masking hundreds of possible compounds; may include MSG, beaver anal gland secretions, and other sources.
sodium benzoate
Combines with vitamin C to form benzene (carcinogen); linked to ADHD in children.
Full ingredient list
Purified water, natural flavor, malic acid, citric acid, monk fruit extract (lou han guo), sodium benzoate, potassium sorbate, stevia leaf extract