First book that put me on the path to healthy living was ”Why animals don’t get heart attack but people do” by Dr. Rath. Back in 2003 I started taking 3 to 4 grams of vitamin C daily and I have continued to do so ever since. Vitamin C helps to maintain the immune system at its optimum level.
Another vitamin I take daily is vitamin D3. Why? Because there is so much research being published that link low levels of vitamin d in the blood with all sorts of illnesses. Even if only one or two of these links are true then it will be worth it. Dr. Davis recommends high dosage of vitamin d3 for everyone. You can read his blog on track your plaque site. http://www.trackyourplaque.com/blog/
Normally I try to live on ingredients that can be found easliy in most grocery stores and supermarkets. Vitamin C is probably available in sufficient amounts in fruit and vegetables and may not be totally necessary. But I definitely do not get enough vitamin d as I spend most of my day working indoors in an office.
I purchase my vitamins online from http://www.iherb.com/. The prices are competetive and delivery charges for orders outside US are reasonable. First time customers can get a five dollar ($5) discount by entering this code: LUT897. Other online site I order from is swansonvitamins.com.
Have a long, happy and healthy life.