What Doctors Do't Tell You e-news 17/05/12
High-dose vitamin C lowers blood pressure, prevents stroke
The amount, which is around five times the recommended daily allowance, is especially effective in people already diagnosed with high blood pressure, or hypertension.
The vitamin can lower blood pressure by 5 millimetres of mercury, which is half as good as an ACE inhibitor or diuretic (water pill), in people with hypertension. The immediate impact is a 3 millimetres fall, enough to reduce significantly the number of people who suffer a stroke, say researchers from the Johns Hopkins University School of Medicine.
The researchers think the vitamin works in a similar way to a diuretic, allowing the kidneys to remove more sodium and water from the body, and helping relax blood vessel walls.
The process suggests that vitamin C doesn’t directly reduce rates of cardiovascular disease, they caution.
Vitamin C is found in fruit and vegetables, and can also be taken as supplements.
(Source: American Journal of Clinical Nutrition, 2012; 95: 1079-88).
The report mentioned the level of vitamin C needed could be obtained in 6 glasses of vitamin C, but this was not written as a recommendation to follow. Fruit juice offers a very concentrated amount of fruit sugar, which may not be helpful for blood glucose levels and will also provide a lot of calories. It is easier to obtain this level of vitamin C as a supplement. Look our for supplements that don't contain added sugar or artificial sweetening.