Formaldehyde-Releasing Preservative- Common type of preservative found in cosmetics.
Fragrance- One or a blend of volatile and/or fragrant plant oils (or synthetically derived oils).
Frankincense Extract- Fragrant component used in skincare products; it can be a skin sensitizer.
Fibronectin- Type of protein found in the skin.
Fig- Fruit that contains psoralens, which are compounds that may cause sensitizing reactions.
Filipendula Glaberrima- Also known as Nakai, the root of this plant extract has been shown to be an antioxidant.
Film-Forming Agent- Large group of ingredients that are typically found in hair-care products.
Fir Needle Oil- Volatile, fragrant oil that can cause skin sensitivity.
Fireweed Extract- Extract from the Epilobium angustifolium plant; also known as willow herb.
Fd&C- Type of coloring agent. According to the FDA, when FD&C is followed by a color.