This is a grey area of magick, some say it's real, others feel it's a placebo.
Beauty spells work when coupled with effort. You won't cast one and get a new nose, but you could make a face wash to clear acne. Some would say the chant and energy made it work, others it's the herbs used that cleared your skin. I personally feel beauty spells speed the results, but you won't see instant dramatic change like go to bed looking like you, wake up like Chris Evans or whoever.