D is a substance which helps the body absorb and store calcium.
It is therefore important for growth and maintanence of bones
Your body absorbs vitamin D from exposure
to sunlight on your skin. 15 minutes of daily exposure is
usually sufficient, although this can vary according to weather,
time of year, amount of skin exposed and sunscreen use.
Vitamin D is also available in vitamin D-fortified
milk, liver, fish, butter and egg yolks. Adults should have
a daily intake of 400 international units (IU) of vitamin
D. Excess (unused) vitamin D can build up in your body. Prolonged
excessive intake of vitamin D can cause serious side-effects
including weakness, vomiting, anxiety and kidney problems.
by Catherine E. Myers. Copyright © 2006 Memory Loss and the Brain