Aspirin like substances in neem
by Sheila F
You mentioned that neem has aspirin like substances. If the aspirin like substances in neem have the same affects as aspirin (made out of salicylic acid also known as Beta Hydroxy Acid, BHA for short), than you're right about it being a good treatment for acne. Considering BHA is an exfoliate and has anti-inflammatory properties.
If it so happens to be true, that neem has some of the same properties of aspirin, than I think it would be important to put emphasis on the use of sunscreen instead of declaring it someting to avoid. I say this because when BHA is used the skin becomes more susceptible to sensitivity of the sun by 50%. Meaning you will need a good SPF moisturizer after using neem products.
I'm not trying to bash neem products b/c it happens to have aspirin like substances. But if it mimics positive effects of BHA then it it likely to have the same negative effects. I myself am trying out neem products, but I also make sure to put on moisturizer with a good spf as well.