Here's A Handy Cheat Sheet For Which Alternative Therapies Actually Work Beth Skwarecki Oct 25, 2018, 8:00pm 2 Apple cider vinegar doesn’t shine your hair or rev your metabolism. Yoga is good exercise but not a miracle cure. Homeopathy is useless. On the other hand, light therapy can help seasonal depression. Alternative medicine is kind of a grab bag, and it can be tough to remember what’s what.