I also swear by Alpha Hydroxy Acids, for acne, but I've usually had to buy spendy brands to find one that didn't sting.

I agree. Alpha Hydroxy Acid has been really good for evening out my skin tone and giving my skin a radiant appearance. I have not seen the Walgreen's brand, I just use the Alpha Hydrox line that is available at Ulta. I have the Souffle, the Enhanced Face Lotion, and the Nourishing Cleanser. I have seen significant results with the souffle and the enhanced lotion, but have not seen *much* of a difference with the cleanser. I will use the cleanser until it runs out until I can give a complete opinion, though.

http://blog.perriconemd.com/alpha-lipoic-acid-proper-dosage/ 

Check out Dr. Perricone's Blog re: ALA dosages, products containing ALA, and foods which contain ALA.

I love Dr. Perricone's Nutritive Cleanser, No Foundation Foundation, Advanced Face Firming Moisturizer, all which include ALA -- ooohhhh.... the list goes on!