Inositol - An Unofficial B Complex Vitamin

Inositol (also known as myo-inositol or vitamin B8) is an unofficial B complex vitamin that works very closely with the nutrient choline. Its functions in the human body include keeping the cell membranes healthy, breaking down fats and supporting the production of various substances. In this article I will be discussing inositol in greater detail and providing you with a summary of its main functions, the best food sources, the recommended daily allowances (RDAs) and the potentially adverse effects of consuming too much or too little.

1) DISCOVERY:

Inositol was first discovered by Scherer in 1849. It was later produced by Wieland and Wishart in 1915. In the 1930s Dangschat and Posternakt published its full chemical structure.

2) FUNCTION:

Inositol has many roles in the human body. It supports the production of bone marrow, eye membranes, healthy cell membranes, intestinal cells, myelin (a protein which covers the nerves), neurotransmitters (chemicals which transmit messages between nerve cells) and strong hair. In addition to this, inositol acts in a protective capacity by preventing arteriosclerosis (hardening of the arteries) and skin disorders (including eczema). Finally, it keeps the brain healthy, reduces blood levels of low density lipoprotein (LDL) cholesterol (which builds up in the artery walls and causes blockages) and helps the body break down fats.

3) RDA:

Since inositol is not an official vitamin no RDA has been established. However, most sources suggest consuming between 100 milligrams (mg) and 1,000mg of this nutrient. Dosages of more than 1,000mg have previously been used therapeutically but if you are planning on exceeding this amount then you should consult your doctor first.

4) FOOD SOURCES:

Most foods contain some inositol but fruits and vegetables are often the richest source. Almonds (278mg per 100 grams (g)), grapefruits (199mg per 100g), great northern beans (440mg per 100g), oranges (307mg per 100g) and peanuts (133mg per 100g) all contain high levels of this nutrient.

5) OVERDOSE SYMPTOMS:

Your body excretes excess inositol so overdosing on this nutrient is almost impossible. The only reported overdose symptom associated with inositol is diarrhea and extremely high amounts have to be consumed before diarrhea develops.

6) DEFICIENCY SYMPTOMS:

Dietary deficiencies of inositol are extremely rare. However, taking certain antibiotics and drinking lots of coffee can reduce the level of inositol in your body and ultimately cause a deficiency. The symptoms of inositol deficiency include alopecia (hair loss), atherosclerosis (narrowing of the arteries), constipation, eczema, increased cholesterol levels and memory loss.