Green coffee beans

Does green coffee bean extract reduce blood pressure?

Pawel Malczewski
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Short summary:

Systolic and diastolic pressure is reduced significantly with the supplementation of green coffee extract. For a quick answer click here.

Explanation

Two studies clearly show the reduction in blood pressure following supplementation with green coffee extract.

The first 12 week study has shown that taking 140mg of chlorogenic acid daily from green coffee bean extract significantly reduced blood pressure in people with mild hypertension. This reasonably small amount of chlorogenic acid has not presented any side-effects. (1)Watanabe T, Arai Y, Mitsui Y, Kusaura T, Okawa W, Kajihara Y, Saito I. The blood pressure-lowering effect and safety of chlorogenic acid from green coffee bean extract in essential hypertension. Clin Exp Hypertens. 2006 Jul;28(5):439-49. Available here.

Another study found that, after 28 days, mildly hypertensive participants taking 93mg and 185mg doses of green coffee bean extract have shown a reduction in both systolic and diastolic blood pressure. The drop in blood pressure was dose related – the higher the dose, the bigger reduction in blood pressure. (2)Kozuma K, Tsuchiya S, Kohori J, Hase T, Tokimitsu I. Antihypertensive effect of green coffee bean extract on mildly hypertensive subjects. Hypertens Res. 2005 Sep;28(9):711-8. Available here.

Conclusion

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If you consider taking green coffee bean extract for blood pressure reduction, take into account the recommended daily dosage to avoid possible toxicity and be aware that you might lose some nutrients if you take it with meals.

References   [ + ]

1. Watanabe T, Arai Y, Mitsui Y, Kusaura T, Okawa W, Kajihara Y, Saito I. The blood pressure-lowering effect and safety of chlorogenic acid from green coffee bean extract in essential hypertension. Clin Exp Hypertens. 2006 Jul;28(5):439-49. Available here.
2. Kozuma K, Tsuchiya S, Kohori J, Hase T, Tokimitsu I. Antihypertensive effect of green coffee bean extract on mildly hypertensive subjects. Hypertens Res. 2005 Sep;28(9):711-8. Available here.

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