Are brewers yeast tablets good for clearing up my skin from acne and marks ?

Adjunct only: Don't expect any results. I'm sorry your acne hasn't been managed scientifically up until now. If topical benzoyl peroxide as tolerated has not cleared you in two weeks, get with your personal physician, or make the phone call now if you're getting scarring. Acne is a serious, chronic disease and personal liability and you're old enough to demand effective treatment, not an old 'pop' treatment.