This product sold by Sephora claims that its unneutralized lactic acid ingredient "increases epidermal firmness and thickness, and renews skin". It also claims that its licorice ingredient "brightens skin, fights hyperpigmentation, and works as an anti-inflammatory". It seems to have decent reviews, 4/5 stars, and anecdotes to back up these claims. This product is sold in 1oz bottles.
Here is the full list of ingredients:
- Unneutralized Lactic Acid: Plumps fine lines, increases epidermal firmness and thickness, and renews skin.
- Licorice: Brightens skin, fights hyperpigmentation, and works as an anti-inflammatory.
- Squalene: Helps repair the skin barrier.
- Yeast Extract: Encourages healthier skin.
Agave Tequilana (Blue Agave) Leaf, Cypripedium Pebescens (Orchid), Opuntial Tuna (Prickly Pear) Fruit, Aloe Barbadensis Leaf Extract & Saccaromyces Cerevisiae (Yeast), Glycyrrhiza Glabra Extract, Lactic Acid, Caprylic/Capric Triglyceride (Coconut Oil), Butylene Glycol, Squalene, Cyclomethicone, Dimethicone, PPG-12/SMDI Copolymer, Stearic Acid Glycyrrhiza Glabra (Licorice) extract , PEG-100 Stearate, PEG-75 Meadowsol, Lemongrass Extract, Arnica Extract, Triethanolamine, Xanthan Gum, Phenoxyethanol, Steareth-20, DMDM Hydantoin.
Do either "unneutralized" lactic acid or licorice improve skin tone and appearance, consistent with these claims?