Everyone's cardiovascular system begins plunging at around age 30. By age 50, the levels of Nitric Oxide approaches zero, making us prone to heart attacks & strokes. You can reverse this deadly decline in Nitric Oxide by measuring your saliva with Nitric Oxide Test Strips, taking supplements & foods to boost your nitric oxide. Beet Juice is one of the best foods for this. See complete details here ( Save this link): https://docs.google.com/document/d/1vpBf2OUlekJ1gjPy4G_SUSL5BLXc9rp0mO-4KTVuATA/edit#
Be very careful with niacin. Start with a SMALL dosage with meals and SLOWLY increase dosage to 1,500mg a day. If you take too much to start, you will feel like your skin is on fire for about 1/2 hr, called "Flushing."
My daughter in law's father died from a stroke at age 55, totally preventable by simply boosting Nitric Oxide levels in his blood stream. Everyone should take Nitric Oxide very seriously. Heart disease is a leading cause of death.