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Green Mediterranean diet better for heart health: Study

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Jerusalem, Nov 24, 2020-
A green Mediterranean diet, containing even more plant matter and very little red meat or poultry, maybe even better for cardiovascular and metabolic health than the traditional version — at least in men, say researchers.

The Mediterranean diet, rich in plant-based foods, is linked to a lower risk of heart disease, stroke, and diabetes and currently forms the backbone of dietary guidelines to stave off coronary heart disease.

It’s thought that its impact is related to higher dietary intake of polyphenols, ‘healthy’ fats and fibre and lower animal protein intake.

The researchers wanted to find out whether a greener version of this diet, higher in green plant food sources and even lower in red meat intake, might be even better for health.

They randomly assigned 294 sedentary and moderately obese people (BMI of 31) with an average age of 51 into three dietary groups.

The first group received guidance on boosting physical activity and basic guidelines for achieving a healthy diet.

The second received the same physical activity guidance plus advice on following a calorie-restricted (1500-1800 kcal/day for men and 1200-1400 kcal/ day for women) traditional Mediterranean diet.

This was low in simple carbohydrates, rich in vegetables, with poultry and fish replacing red meat. It included 28 g/day of walnuts.

The third group received physical activity guidance plus advice on following a similar calorie-restricted green version of the Mediterranean diet (‘green Med’).

After six months, the effect of each of the diets on weight loss and on cardiovascular and metabolic risk factors was assessed.

Those on both types of Mediterranean diet lost more weight: green Med 6.2 kg; Mediterranean 5.4 kg; healthy diet 1.5 kg.

Waist circumference–an indicator of a potentially harmful midriff bulge–shrank by an average of 8.6 cm among those on the green Med diet compared with 6.8 cm for those on the Mediterranean diet and 4.3 cm for those on the healthy diet.

The green Med diet group achieved larger falls in ‘bad’ low-density cholesterol, a reduction of nearly four per cent.

Similarly, other cardiovascular and metabolic risk factors improved more among those on the green Med diet, including falls in diastolic blood pressure, insulin resistance, and an important marker of inflammation, C-reactive protein, which has a key role in artery hardening.

“Our findings suggest that additional restriction of meat intake with a parallel increase in plant-based, protein-rich foods, may further reduce cardiovascular risk, beyond the known beneficial effects of the traditional Mediterranean diet,” the authors wrote. (Agency)

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