Ingredient Dictionary

Browse our entire database of scientifically-backed cosmetic ingredients. Uncover the chemistry behind your favorite skincare products.

Functional / Support

Hydroxypropyl Methylcellulose

The ultra-gentle, plant-based thickener.
Active Ingredients

Hydroxypropyl Tetrahydropyrantriol

The patented L'Oreal volume restorer.
Hydrator / Humectant

Hydroxypropyltrimonium Hyaluronate

The HA that survives being washed off.
Antioxidant

Hydroxytyrosol

The ultra-pure olive antioxidant.
Soothing / Anti-Inflammatory

Hypnea Musciformis Extract

The glycation-fighting red seaweed.
Functional / Support

Hyssopus Officinalis Extract

The purifying, pore-cleansing herb.
Antioxidant

Idebenone

The synthetic, upgraded version of CoQ10.
Antioxidant

Ilex Paraguariensis Leaf Extract

The vitamin-packed, energizing tea extract.
Functional / Support

Illite

The circulation-boosting, purifying green clay.
Functional / Support

Imidazolidinyl Urea

The secondary formaldehyde-releasing preservative.
Antioxidant

Inonotus Obliquus Extract

The antioxidant-dense, adaptogenic mushroom.
Hydrator / Humectant

Inositol

The cellular-signaling water regulator.