Yes, peptides are naturally-occuring amino acids that constitute essential proteins required by the skin. Your skin will not have any adverse reactions as peptides are not formulated with chemicals or added ingredients. As for the rest of the tinted brow gel formulation, as always it is vegan, cruelty-free, paraben-free, sulphate-free, fragrance-free and ethically sourced. We have also clinically tested the brow gel for sensitive skin types and it is classified safe for all levels of sensitivity.