Prevent Cavities, Cancer, Heart Disease, Obesity, and Problems of Aging
Vitamin A, vitamin C, niacin, thiamine, and vitamin D are the five and only five vitamins associated with pandemic deficiency diseases. Optimizing the doses of these five vitamins is worth the effort. Deficiency of these five vitamins is responsible for the present pandamic of cavities, osteoporosis (osteopenia), cancer, heartdisease, and obesity. Here is a good place to start:
one 10,000 IU vitamin A per week (not per day - per week)
two 100 mg tablets of thiamine per day (one in the morning and one in the afternoon)
one 250 mg time release niacin two or three times per week
six 1000 mg vitamin C tablets (three in the morning and three in the afternoon)
The safest way to get vitamin D is regular, full body sunshine. Do not tan. The tan blocks the sun's rays and reduces vitamin D formation. Get no less than 10 and no more than 30 minutes of full body sunshine as often as possible when the sun is shining. This amounts to no more than 15 and no less than 5 minutes on each side. Every square inch of the skin will produce vitamin D. Using all of it on a regular basis is a good idea. If you have very dark skin you may need significantly more time in the sun. I have been unable to find a credible scientific article measuring the vitamin D production efficiency of very dark skin and directly comparing it to the vitamin D production efficiency of light skin.
There is a better way to get vitamin B1. This is a vitamin B1 supplement that goes by the name of TTFD. TTFD is not stable to stomach acid, so ordinary tablets are not much better than ordinary thiamine. TTFD powder can be rubbed into the skin (a pain in the neck), or can be purchased as 50 mg enteric coated tablets (preferred). Just a couple of TTFD tablets per week is probably enough to get most of the benefits.