Does anybody knows how to prevent varicose veins?

Make sure your diet includes plenty of Vitamin E. Recommended daily intake for women 19 - 56 is 7mg. Excessive amounts of Vit E will be excreted in the urine. Try adding a couple of tblspns of wheat germ to your weetbix in the morning (health food store). Maybe go to the chemist and buy a vitamin tablet which contains Vit E........If you are taking iron tablets at the moment its best to take them 8 hours before or after Vit. E. Best time to take Vit E. tablets is before meals or before bedtime....Hope this helps........Good Luck....:)

Wear those supportive stockings, don't stand on your feet for long periods of time and never have kids.
try massage therapy to help circulation. OR Wear supportive or ted hoses. Don't stand on your feet to long- and wear good shoes if and when you do.
wear compression stockings, elevate your legs, exercise regularly and avoid standing for long periods of time. Try to avoid gaining too much weight.
support stockings and exercise to help circulation
This has good results--

http://www.venapro.com/?aid=685104...
Try not to stand still for long periods of time - always keep your feet moving. Try to lose weight if overweight. Sit with legs elevated. Don't sit with crossed legs.Drink plenty of water to keep blood thin.
Wear support tights/stockings if pregnant. Put them on before getting out of bed so the veins do not get a chance to fill up.

Use some type of horse chestnut cream - found in the pharmacy