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The green Mediterranean diet might be healthier than its regular cousin, says study

Published on:24 November 2020, 19:39pm IST
We have seen various diets trends going around in the last few years, and this year it is the green Mediterranean. But is it any better?
ANI
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What makes the green Mediterranean diet better? Let’s find out. Image courtesy: Shutterstock
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Green Mediterranean diet focuses on eating foods like vegetables, whole grains, and legumes. And unlike other diets, this Mediterranean diet doesn’t allow some foods such as red meat, added sugar, and refined grains. But is this strictness worth it?

The plant-based diet Mediterranean diet has been proved helpful in preventing certain diseases, however, recent research has found that the green Mediterranean or ‘green Med’ diet containing even more plant matter and very little or no red meat or poultry might be even better. It’s thought that its impact is related to higher dietary intake of polyphenols, ‘healthy’ fats and fibre, and lower animal protein intake.

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The research published in the journal Heart found that 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. 

Here’s how the research was carried out

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 of BMI 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 1200-1400 kcal/ day for women in the 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.

dairy and osteoporosis
Count on the green Mediterranean diet for better heart health, ladies. Image courtesy: Shutterstock

This included 28 g/day walnuts, avoidance of red and processed meat, and higher quantities of plant-based food. It also included 3-4 cups/day of green tea and 100 g frozen cubes of Wolffia globosa (cultivated Mankai strain), a high protein form of the aquatic plant duckweed, taken as a green plant-based protein shake as a partial substitute for animal protein.

The results were astonishing…

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 of 6.1 mg/dl, a reduction of nearly 4%. The equivalent figures were 2.3 mg/dl (nearly 1%) for those in the Mediterranean diet group, and 0.2 mg/dl for those in the healthy diet group.

Cardiovascular risks were reduced

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. The ratio of ‘good’ to ‘bad’ cholesterol also increased.

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These changes resulted in a substantial nearly 2-fold fall in the 10-year Framingham Risk Score–a calculation used to predict the likelihood of serious heart disease over the next decade–among those on the green Med diet.

The researchers caution that their sample included just 35 women, nor were they able to identify the specific factors in the green Med diet responsible for the observed effects.

But they write: “Education and encouragement to follow a green Med dietary pattern in conjunction with physical activity have the potential to be a major contributor to public health as it may improve the balancing of cardiovascular risk factors, eventually preventing cardiovascular morbidity and mortality.”

And they conclude: “Our findings suggest that additional restriction of meat intake with a parallel increase in plant-based, protein-rich foods, may further benefit the cardiometabolic state and reduce cardiovascular risk, beyond the known beneficial effects of the traditional Mediterranean diet.

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