Level 2 Glycolic 50% (2.1pH) - Looking for more results than the 30. Previous professional peels. Bottle is about 60-70% full Chemical peels are great for use as: Anti aging treatments, Acne treatments, Scar treatments, and to re-freshen the skin periodically. Glycolic has a small molecule and can penetrate into the skin very easily. Excellent results can be obtained by using glycolic peels weekly or bi-weekly. Expect mild flaking (peeling) to begin on day 3. Glycolic is one of the most common alpha hydroxy acids. Its popularity stems from its extra small molecular makeup. The tiny molecules can penetrate easily into the skin giving most people a great sloughing action after they perform a peel.