Search results
Results From The WOW.Com Content Network
Skin whitening, also known as skin lightening and skin bleaching, is the practice of using chemical substances in an attempt to lighten the skin or provide an even skin color by reducing the melanin concentration in the skin. Several chemicals have been shown to be effective in skin whitening, while some have proven to be toxic or have ...
Like alpha hydroxy acids ... and it's caused by a buildup of keratin in the hair follicles. While there’s no treatment to make it go away entirely, Dr. Thosani says that salicylic acid can help ...
The FDA has warned consumers that care should be taken when using alpha hydroxy acids after an industry-sponsored study found that they can increase the likelihood of sunburns. [9] This effect is reversible after stopping the use of alpha hydroxy acids. Other sources suggest that glycolic acid, in particular, may protect from sun damage. [9]
These are a strong form of toner that typically contains alpha hydroxy acid and or beta hydroxy acid. Acid toners are formulated with the intent of chemically exfoliating the skin. [ 13 ] Glycolic, lactic, and mandelic acids are the most commonly used alpha hydroxy acids , best suited to exfoliate the surface of the skin.
Problem #4: Brassy Color If blond or highlighted strands are looking a little brassy thanks to sun and chlorine -- UV rays penetrate strands, breaking down your color -- it might be time to revamp.
The shampoo alone has nearly 10K reviews, with users noting noticeable improvements in their gray hair’s color, especially those with color-treated hair. Pros Neutralizes yellow or brass tones
The most obvious, first effects (gingival and hair problems) of absence of ascorbic acid in humans come from the resulting defect in hydroxylation of proline residues of collagen, with reduced stability of the collagen molecule, causing scurvy. Increased serum and urine levels of hydroxyproline have also been demonstrated in Paget's disease. [10]
α-hydroxy ketones give positive Tollens' and Fehling's test. Some acyloins rearrange with positions swapped under the influence of base in the Lobry–de Bruyn–van Ekenstein transformation; A similar reaction is the so-called Voigt amination [6] where an acyloin reacts with a primary amine and phosphorus pentoxide to an α-keto amine: [7]