A few new things I haven't heard yet...

http://www.mirror.co.uk/news/topstor...9520-19241885/

DO SUNGLASSES CAUSE SUNBURN?
SKIN colour changes when you are exposed to the sun because your body is told to produce more melanin - skin pigment - by your pituitary gland.
Melanin stops your skin from absorbing ultraviolet light.
It is this ultraviolet light which has the effect of burning the skin.
But the pituitary gland only knows how much melanin to make from the signals it gets from the eye. If the eye says it's sunny, the pituitary gland goes into overdrive.
But with shades on, the gland is fooled so less melanin is produced - meaning a higher risk of burning.
DOES SUN LOTION HURT YOUR BONES?
VITAMIN D is vital for healthy bones. If we don't have enough, then adults can develop osteoporosis and children rickets.
But unlike most vitamins, we don't need to eat vitamin D - our bodies can make it by themselves when exposed to the right kind of sunlight.
Ultraviolet B rays - strongest when the sun is directly overhead - help the body convert cholesterol to vitamin D.
But suntan lotion blocks UVB meaning the body cannot create vitamin D. In Australia, the Slip-Slop-Slap suntan campaign slashed skin cancer rates - but it sent vitamin D deficiencies soaring.
CAN SUNBEDS CUT YOUR CHOLESTEROL?
SOME doctors are prescribing UVB sunbeds for sufferers of stomach complaint Crohn's disease.
Most Crohn's sufferers have a vitamin D deficiency because of the way the disease inflames the intestine and prevents the absorption of nutrients.
But by using a sunbed three times a week for six months, cholesterol is swapped for vitamin D - meaning healthy bones and a healthier heart.