Recently there are two interesting trends in combating depression:
1. Multi-vitamins appear to be the key in treating early symptoms of depression.
Disclaim: I'm not a scientologist, but a christian, and vote for Trump.
I am aware of some positive experience of using vitamins to combat depression. I also remember reading an article about scientology treatment on HuffPost.
When I did further research, I find scientology has a long history of successful treatment. According to Scientology, "sauna detox, aerobic exercises and niacin(Vitamin B3)" will help people detox the body. It has successfully treated sick veterans(PTSD) by prescribing large doses of vitamins and aerobic exercises. For teens, there are many teenager vitamins on Amazon, for example Naturelo whole food multivitamin for teens.
Given no serious side effects of vitamins & exercises, I post it here, hopefully it may help people.
2. For severe depression, there is a recent UCSF experiment that inserts a device into a woman's brain, and it helps. Link: https://www.sfchronicle.com/health/article/Woman-s-depression-relieved-by-electrical-brain-16503674.php