Also known as: Aesculus hippocastanum, Conker tree, Aescin
Horse chestnut seed extract, standardized to its active compound aescin, is one of the best-studied herbal remedies for chronic venous insufficiency. It reduces leg swelling, pain, and heaviness by strengthening vein walls and reducing capillary permeability.
Horse chestnut (Aesculus hippocastanum) seed extract contains aescin (escin), a complex mixture of triterpene saponins that is the primary active compound. Aescin strengthens venous walls by enhancing the production of prostaglandin F2α, which increases venous tone. It also reduces capillary permeability by modifying the permeability of vascular endothelium. A Cochrane systematic review of 17 trials found that horse chestnut seed extract significantly reduced leg pain, edema, and pruritus in patients with chronic venous insufficiency (CVI), with efficacy comparable to compression stockings. Aescin also demonstrates anti-inflammatory effects by inhibiting hyaluronidase and reducing neutrophil activation. The extract must be processed to remove the toxic compound esculin present in raw seeds. Standardized horse chestnut seed extract (16–20% aescin) is the recommended form and is approved as a phytomedicine for CVI in several European countries.
A Cochrane systematic review of 17 randomized controlled trials found horse chestnut seed extract significantly reduces leg pain, edema, and heaviness in CVI patients, with efficacy comparable to compression therapy.
Aescin reduces capillary permeability and fluid filtration, leading to measurable reductions in leg volume in controlled clinical trials.
Aescin inhibits hyaluronidase activity and reduces neutrophil adhesion to endothelial cells, contributing to its anti-edema and anti-inflammatory properties.
Twice daily with meals
Use only processed, standardized seed extracts — never raw seeds, which contain toxic esculin. Effects typically seen within 2–4 weeks.
Clinically validated venous health support
Localized leg discomfort and swelling
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