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Elevated estrogen levels are believed to contribute to varicose veins. Detoxing estrogen and balancing hormones may help.
This long article discusses the role of zinc in hormone balance:
http://goddessignited.com/copper-estrogen-zinc-hormone-imbalance/
Vitex is also believed to balance hormones. The following is from http://main.poliquingroup.com/Tips/tabid/130/EntryId/2321/Top-Ten-Foods-To-Detox-Estrogen.aspx
To help detox estrogen: Sesame seeds, fenugreek seeds, flax seeds, omega 3s, high fiber fruits and vegetables, cruciferous vegetables, citrus fruits, protien - especially lysine and threonine, magnesium sulfate
Aromatase blockers prevent testosterone from being converted to estrogen: melatonin, cherries, green tea
Weight loss and probiotics are also suggested.