Hello,
I have been asked to comment on BHA's effect on rosacea. Yes, BHA (Beta
hydroxy acid) seems to work well for some rosaceans with oily skin, a strong
component of acne and seborrheic dermatitis. I do not think it works as well
to reduce redness. The most popular BHA is salicylic acid. Over the counter
products with salicylic acid usually range from 1 to 2 %. Salicylic acid is
a good exfoliant - it loosens accumulated epithelial cells that cause
clogging of pores. Alpha hydroxy acids (most popular are glycolic acid &
lactic acid) are also good exfoliants. The difference between AHA and BHA is
that AHAs are water soluble while BHAs are oil soluble. A small percentage
of BHA can get to the sebaceous follicles easier. AHA in higher
concentration (above 30%) tends to act on the dermis while BHA restricts its
action superficially on the epidermis. Salicylic acid is a form of
salicylate such as aspirin. It has anti-inflammatory capabilities due to its
effect on the arachidonic acid cascade. This latter effect gives salicylic
acid mild anesthetic properties. Hence, it causes less stinging sensation
and greater mildness in those with rosacea, seborrheic dermatitis and acne.
Although salicylic acid is effective, sometimes the vehicle it is in, is
also important as it needs to penetrate adequately for it to work. That's
why in our Linda Sy Acne Oil Control Gel (w/ 2 % salicylic acid), we have
used a moisturizing hydrophilic gel-alcohol vehicle and not a water based
vehicle. This leaves the skin feeling soft. It is best to use this product
after you have applied a moisturizer first.
Obviously, not every rosacean will benefit from salicylic acid. Every one is
different.
Linda Sy M.D.
Linda Sy Skin Care
http://www.lindasy.com
Voice:Toll-free 877-Lindasy (546-3279)
FAX: 925-939-5207