Snapshot
- Overview
- Alpha-lipoic acid, a well-studied antioxidant that smooths and refines skin.
- Category
- Antioxidant, Anti-aging, Tone/Texture
- Type
- Antioxidant
Thioctic Acid
Thioctic acid, also known as alpha-lipoic acid, is a small sulfur-containing antioxidant soluble in both water and oil. Cosmetics use it for antioxidation and to refine the look of tone and texture, and it's backed by fairly well-established research.
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Our take
Is Thioctic Acid a Good Ingredient?
It rates Good because alpha-lipoic acid is a well-characterized antioxidant with both water- and oil-phase activity and some clinical support for improving texture and radiance. It's relatively stable and effective at low levels, though it can tingle on sensitive skin, which keeps it just shy of Great.
What it does
Skin Benefits
Improves the look of radiance and smoothness while helping counter environmental oxidative stress, and can visibly refine the appearance of pores and uneven texture.
Where you'll find it
Uses in Skincare & Cosmetics
Included in targeted serums, face creams, and eye formulas, often positioned in resurfacing, brightening, or age-supporting products.
Before you use it
Safety
Generally safe for topical use, but may cause transient stinging or irritation, especially at higher concentrations or when layered with strong exfoliants or retinoids. Introduce it gradually and avoid broken skin. No common regulatory constraints noted.
Products with Thioctic Acid
