Inositol - Naturally occurring in lecithin, this B vitamin is produced by the body in greater quantities than any other nutrient. Essential for cell respiration, it helps maintain skin and scalp health.

Iodides - Compounds containing iodine, naturally occurring in plants that grow in the sea. Applied topically, they are excellent antiseptics.

Iron Oxides - A naturally occurring mineral used as a coloring agent in cosmetics.

Ivy - Hedera helix . Antifungal often found in massage lotions and anticellulite preparations for its skin-toning and firming properties. Contains malic acid, a natural fruit acid that encourages skin cell turnover. Also used in shampoos and hair products for dandruff and other scalp problems. Contains saponins.