Parabens (Methylparaben, Propylparaben) - Preservatives linked to hormone disruption.

Phthalates (Diethyl phthalate, DnHP) - Can also disrupt hormonal balance.

Sulfates (Sodium Lauryl Sulfate, Sodium Laureth Sulfate) - Harsh cleansers that can strip skin of its natural oils and cause irritation.

Formaldehyde and Formaldehyde-Releasing Agents (DMDM Hydantoin, Quaternium-15) - Preservatives associated with skin irritation and potential cancers.

Synthetic Fragrances - Often undisclosed blends of chemicals that can cause allergic reactions and irritation; "fragrance" on the label can mask many synthetic ingredients.

Synthetic Dyes (FD&C Colors) - Colorants can cause sensitivities or allergic reactions.

Mineral Oil - A petroleum derivative that can clog pores and prevent skin from breathing.

Silicones (Dimethicone, Cyclopentasiloxane) - Can trap dirt and oil in the pores.

Alcohols (Ethanol, Isopropyl alcohol) - Can be extremely drying and irritating, especially in high concentrations.

Toluene - A solvent often found in nail products, linked to potential reproductive harm.

Triclosan and Triclocarban - Antimicrobial agents that may contribute to antibiotic resistance and can disrupt endocrine function.