She finally had to have a vein removed. She stopped the horsechestnut for awhile but plans to start again because she continues to have the problem of cold extremities. I think there is something else that you can take with it to increase the effect but cannot now remember what it is, but I think it is black walnut. I'll ask her and let you know or you could do some research.
Horse chestnut has been well-researched for its role in supporting vein health. It helps support good circulation and vein tonicity. But you should also include other nutrients and herbs that are a beneficial combination. Diosmin, hesperiden, buctherís broom, gotu kola leaf extract along with the antioxidant Vitamin C all help to promote antioxidant strength, strengthen valves, and support healthy circulation. I have used this and it works well for me.