does apple cidar vinegar work on acne scars?

also i want to use it to clear my skin, but im already extremely underweight, and don’t want to loose any more, how much would i loose from taking it do you think?

and what are any other benefits?

I’ve been using the clean & clear advantage acne spot treatment for about 2 years now, and ive never purchased a new tube. Recently it seems as if, instead of clearing up my occasional breakouts, it’s making them worse! I’m wondering if this could be happening because the tube is worn out and the salicylic acid has lost its ‘acidity’.