Deficiency, Dependency, and Toxicity

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Information listed here explains the recommended dietary levels of key vitamins and minerals and their importance to body functions. Includes conditions and disorders caused by too much (toxicity) or too little (deficiency).

Calcium

Iron

Phosphate

Potassium

Sodium

CerefolinNAC
Naturally addresses genetic nutritional deficiencies associated with cognitive impairment in the elderly.
Merck Manual: Vitamin Deficiency, Dependency, and Toxicity
Includes overview of vitamins and details on specific items, including thiamin, folate, vitamin C, and Vitamin K.
Vitamins-Nutrition.org: What Can Mineral Deficiencies Do?
Explains what minerals are and why they're important, as well as the effects of specific deficiencies.