Vascanox HP is a breakthrough product providing nitric oxide support for up to 24 hours with a single dose. Vascanox HP supports the natural production, storage and release of nitric oxide. Optimal nitric oxide levels have been shown to: Support a healthy cardiovascular system, support and maintain blood pressure in the normal range and supports healthy circulation. Calroy's proprietary, patent-pending formula targets nitric oxide metabolism, using multiple pathways. Each 60 capsule bottle is a 1-month supply. Take 2 capsules each morning with or without food.