There are no studies showing that anything can be taken to prevent varicose vains. We have seen a few people who say they use varicose vains on their skin and were surprised to find out that it actually makes the skin more tender. Also, the varicose vains don't always get to the problem; sometimes they only irritate it. Sometimes varicose vains cause more problems than they solve.
If you have a problem that you want solved with varicose vains, I would recommend asking a doctor. Many people don't like a doctor, and I understand. You don't want to make a lot of money on this, and many people just aren't interested in going to the doctor. I can understand that, too, especially if you're a private practitioner. But the reason I don't recommend this is because I see more than 500 people every year who go to the doctor because they have varicose vains. I don't think it's worth the hassle, especially if the problem is minor. I also see people who have varicose vains and end up with problems such as: varicose veins. They bleed all over the place, and are painful to walk in. They bleed in their shoes and on their clothing.