I'm a big vitamin and sunshine proponent. THen again, I'm a HUGE fan of "what works." When it comes to cancer, do your own research on variety, type, and mutation. Some, chemo is one of the best things on earth. Others, it's radiation. Others, it's dietary change. Most, it's a combination of all of the above. Unfortunately, some don't respond to any of that. While I'm a filthy hippie about a lot of things, I'll be fucked if I die because I refuse modern medicine because "it's not natural." Neither are clothes. Get the hell over yourself, do your research, and use the best combination of treatment you can find. If that includes irradiating yourself until you glow green with minimal long term effects, then irradiate yourself.
Most depression CAN be corrected for with vitamins, sunshine, eating right, and exercising. There are certain kinds that actually ARE serotonin conversion issues and other stuff we haven't found the right combination of food, but drugs do fucking AWESOME. Again, it's finding which one works for you. Don't go so hippie crunchy that you write off all modern medicine.
Sorry, Jen, this isn't actually directed at you. I just get uppity when people completely ignore one or the other in favor of what they "know." No one "knows" everything, so shut the hell up; do your research with an open mind; and do what WORKS.