Well, "can't always" doesn't mean that they can't "sometimes".  The things
he suggests are relatively simple.

Maintain a healthy weight and

a.. Exercise regularly. This will help to keep your legs muscles and veins
strong. In addition, circulation is very important so include exercises that
focus on the legs such as running or walking.

a.. Avoid crossing your legs when sitting.

a.. Also, when sitting elevate your legs.

a.. Avoid standing for long periods of time.

a.. Drink 6-8 glasses of pure spring water per day.  (My thought is any kind
of water that's not full of salt and other extra minerals should be OK.
Lubbock tap water would not be OK.)

a.. Watch your sodium intake.

a.. Take anti-inflammatory, anti-oxidant supplements.

a.. Increase your fiber intake. The best way is to eat lots of fresh fruit
and vegetables, including apples, old fashioned oatmeal, oat bran or grains
such as barley. Not only is barley a low-glycemic grain, it is high in both
soluble and insoluble fiber. This is important because we need both.

YMMV
but I thought I'd share since spider veins had been mentioned in other post.

Tonia