What it is
Sucralose is a chlorinated derivative of table sugar that is far sweeter than sucrose but contributes no calories and is not metabolized. In personal care it appears almost exclusively in lip products, toothpaste, and other items that contact the mouth, where it masks the taste of other ingredients and improves palatability. It has no recognized effect on the skin barrier or on UV protection and serves a purely sensory role.
Safety & warnings
Sucralose has a long record of use as a food sweetener and is generally well tolerated in the small amounts used in lip and oral-care cosmetics. It is not associated with skin sensitization or comedogenicity at cosmetic levels.
Origin & sourcing
Synthetic. It is manufactured by selectively chlorinating sucrose (ordinary cane or beet sugar), replacing three hydroxyl groups with chlorine atoms.
Questions everyone asks
Why is a sweetener in a lip product?
Sucralose adds a pleasant taste so the product is more agreeable on the lips, since lip items are often partly ingested. It plays a flavoring role and does not affect sun protection.
Does sucralose moisturize or protect skin?
No. It is a taste agent with no meaningful skin-conditioning or photoprotective function; other ingredients in the formula handle those roles.