Iodine
- Details include where iodine occurs in the body, why it is important, and symptoms of deficiency and excess, usually attributed to thyroid problems.
- http://www.merck.com/mmhe/sec12/ch155/ch155e.html

Fluoride
- Describes where this mineral is stored and why it's important. Includes symptoms and treatment of deficient or excessive consumption.
- http://www.merck.com/mmhe/sec12/ch155/ch155d.html

Vitamin K
- Describes the two forms, where they are found, and why they are important. Includes how deficiencies occur, as well as symptoms, diagnosis, and treatment.
- http://www.merck.com/mmhe/sec12/ch154/ch154e.html

Vitamin E (Tocopherol)
- Learn the function of this antioxidant, sources in food, causes, symptoms, diagnosis, and treatment of deficiency and excess levels in the system.
- http://www.merck.com/mmhe/sec12/ch154/ch154d.html

Vitamin D
- Explains the two forms of this essential vitamin. Includes symptoms, diagnosis, and treatment of deficiency, and causes and conditions associated with excess levels.
- http://www.merck.com/mmhe/sec12/ch154/ch154c.html

Vitamin C (Ascorbic Acid)
- Explains the importance of this vitamin, conditions and problems caused by deficiency, and why some people take high doses of ascorbic acid.
- http://www.merck.com/mmhe/sec12/ch154/ch154l.html

Vitamin B6 (Pyridoxine)
- Describes the essential nature of this vitamin, symptoms, and diagnosis of deficiency and excess levels in the system.
- http://www.merck.com/mmhe/sec12/ch154/ch154i.html

Vitamin B2 (Riboflavin)
- Brief article discusses the function of this vitamin, the disorders and procedures that can lead to deficiency, symptoms, diagnosis, and treatment.
- http://www.merck.com/mmhe/sec12/ch154/ch154g.html

Vitamin B12 (Cobalamin)
- Article describes the function of this vitamin in the body and symptoms, diagnosis, and treatment of deficiency.
- http://www.merck.com/mmhe/sec12/ch154/ch154j.html

Vitamin B1 (Thiamin)
- Information includes causes of deficiency, symptoms, diagnosis, and treatment.
- http://www.merck.com/mmhe/sec12/ch154/ch154f.html

Niacin (Nicotinic Acid)
- Provides information on why niacin is important, as well as the symptoms, diagnosis, and treatment of deficiency and excess levels.
- http://www.merck.com/mmhe/sec12/ch154/ch154h.html

Folic Acid (Folate)
- Describes why this vitamin is necessary, as well as the symptoms, diagnosis, and treatment of deficiency and excess.
- http://www.merck.com/mmhe/sec12/ch154/ch154k.html

Vitamin A (Retinol)
- Discusses the several forms, as well as the symptoms, diagnosis, and treatment of deficiency and excess.
- http://www.merck.com/mmhe/sec12/ch154/ch154b.html

WebMD: Vitamin B12 Deficiency Anemia
- A discussion about this vitamin, its deficiency, symptoms, causes and a list of food sources.
- http://my.webmd.com/hw/anemia/hw65708.asp

Chromium Info
- Information on what it is and what it does, chromium-rich foods, dietary supplements, and recommended daily intake. Includes how chromium picolinate effects insulin resistance and FAQs.
- http://www.chromiuminfo.com

Vitamin K Toxicity
- A brief look at this by The Merck Manual.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3i.htm

Vitamin K Deficiency
- Provides information on the different forms and how they effect coagulation. Includes deficiency signs, symptoms, diagnosis, and treatment.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3h.htm

Pantothenic Acid Deficiency
- Some of the signs and symptoms experienced with this deficiency.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3p.htm

Biotin Deficiency and Dependency
- A brief look each at the deficiency and the dependency of this vitamin.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3o.htm

Vitamin B6 Toxicity
- Brief article discusses megadoses and their effect on the body.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3n.htm

Vitamin B6 Deficiency and Dependency
- Symptoms, signs, diagnosis and treatment are discussed.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3m.htm

Niacin Deficiency
- A look at primary and secondary deficiency, symptoms, signs, diagnosis and treatment by The Merck Manual.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3l.htm

Riboflavin Deficiency
- The Merck Manual looks at the symptoms, signs, laboratory findings, diagnosis and treatment.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3k.htm

Thiamine Deficiency and Dependency
- The Merck Manual looks at primary and secondary deficiency, symptoms, signs, some specific diseases caused by deficiency, diagnosis and treatment.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3j.htm

Vitamin C Deficiency
- A discussion about this vitamin and why we need it. Symptoms, laboratory finding, diagnoses, prophylaxis and treatment are covered.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3q.htm

Vitamin E Toxicity
- Provides information of possible side effects and how large doses impact vitamin K function.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3g.htm

Vitamin E Deficiency
- A discussion about this vitamin and the organs which can be affected by deficiency, signs and symptoms, laboratory findings, diagnosis and treatment.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3f.htm

Vitamin D Toxicity
- Discussion on this vitamin and its first symptoms of toxicity and the treatment.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3e.htm

Vitamin D Deficiency and Dependency
- The signs, symptoms, laboratory findings, diagnosis and treatment.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3d.htm

Vitamin A Toxicity
- Symptoms, signs, diagnosis and treatment are discussed by The Merck Manual.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3c.htm

Molybdenum
- A discussion about the deficiency and toxicity of this mineral.
- http://www.merck.com/pubs/mmanual/section1/chapter4/4i.htm

Manganese
- A look at the intake of this mineral and how it compares with each person. A case study about its deficiency.
- http://www.merck.com/pubs/mmanual/section1/chapter4/4h.htm

Selenium
- A look at the intake in different parts of the world and its deficiencies and toxicity by the Merck Manual.
- http://www.merck.com/pubs/mmanual/section1/chapter4/4g.htm

Chromium
- A look at this essential trace mineral and its deficiency and toxicity.
- http://www.merck.com/pubs/mmanual/section1/chapter4/4f.htm

Zinc
- The Merck Manual takes a look at this mineral and signs and symptoms of deficiency and toxicity.
- http://www.merck.com/pubs/mmanual/section1/chapter4/4e.htm

Fluorine
- Provides information about where this form of floride is stored in the body, sources, and problems associated with excess or insufficient intake.
- http://www.merck.com/pubs/mmanual/section1/chapter4/4d.htm

Reference Guide for Vitamins
- The importance and deficiency symptoms of a specific list of vitamins.
- http://www.realtime.net/anr/vitamins.html

Vitamin A Deficiency
- Overview of this vitamin, primary and secondary deficiency, symptoms, signs, diagnoses, and treatment.
- http://www.merck.com/pubs/mmanual/section1/chapter3/3b.htm