What is butylene glycol in skincare?
Butylene glycol, or 1,3-butylene glycol, is a small alcohol used as a solvent, humectant and texture agent. Like propanediol and propylene glycol it is a workhorse rather than a star, appearing high on ingredient lists because formulas need it to function.
It dissolves ingredients that water alone cannot carry, thins heavy formulations to a pleasant consistency, and helps actives spread and penetrate evenly.
What skin concerns does butylene glycol treat?
It hydrates lightly by drawing water into the surface layers, and it is non-comedogenic and weightless, which makes it common in products aimed at oily and acne-prone skin.
Mostly, though, its value is what it enables: the vitamin C, salicylic acid or plant extract next to it in the formula reaches the skin in usable form. Allergic contact dermatitis to butylene glycol is documented but uncommon, and it is generally better tolerated than propylene glycol.
What ingredients are best paired with butylene glycol?
It pairs with essentially everything, and is most often seen alongside glycerin, hyaluronic acid and botanical extracts it helps keep in solution.
One thing worth knowing if you have reacted to propylene glycol: there is documented cross-reactivity between propylene glycol and butylene glycol, so a known allergy to one is a reason to patch test the other rather than assume it is safe. Take our Skin Quiz.
What is crepey skin?
Crepey skin is skin that has become thin, loose and finely wrinkled, with the papery texture of crepe paper. It differs from ordinary wrinkles in that it affects a broad area rather than forming distinct lines, and it appears most on the under-eyes, neck, décolletage, upper arms and inner thighs.
The hallmark is loss of elasticity: pinched skin takes longer to snap back, and the surface looks crinkled even at rest.
What causes crepey skin?
The main driver is degradation of the elastin network in the dermis. Cumulative ultraviolet exposure breaks down elastic fibres and replaces them with disorganised material – the process called solar elastosis – while collagen production falls at the same time.
Age, chronic dehydration, significant weight loss, smoking, and the natural drop in oestrogen around menopause all accelerate it. Body areas get less skincare attention than the face, which is why crepiness often shows there first.
What ingredients are best for crepey skin?
Retinoids remain the best-evidenced option for rebuilding collagen and thickening the dermis over months of use. Peptides support elastin and collagen signalling, and vitamin C protects existing fibres while aiding synthesis.
Layer those over rich hydration – hyaluronic acid, glycerin, ceramides, squalane and shea butter – which visibly improves the crinkled look even before structural change happens. Daily SPF on neck, chest and hands prevents further breakdown. Take our Skin Quiz.
