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Medicine

Vegetarians: less risk of coronary heart disease BUT ...

Bittersweet news for vegetarians, vegans and pescetarians: UK research shows that their diet has less risk of coronary heart disease. But there is more.

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6 September 2019
Gianluca RiccioGianluca Riccio
⚪ 4 minutes

Bittersweet news for vegetarians, vegans and pescetarians: their diet is linked to a reduced risk of coronary heart disease (CHD) compared to diets with meat. Extensive research in the UK shows this published in the newspaper The BMJ.

Why are they bittersweet? Because if on the one hand these three groups have less risk of coronary heart disease, on the other two of the three groups (vegetarians and vegans) have a higher risk of heart attack than meat consumers. In particular, haemorrhagic infarction, which would be a consequence of a low intake of some vitamins and too low a presence of cholesterol.

In recent years, the number of people who have switched to vegetarian and vegan diets has increased dramatically, also due to the perceived benefits for health, as well as concerns related to the environment and animal welfare.

The long-term effects and benefits of this type of diet, however, are still unclear.

The research team of the Nuffield Department of Population Health at the University of Oxford has used data from many historical studies. This also allowed us to study a distinction between vegetarians, vegans and pescetarians on the effects of food over a period of 18 years.

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Research led by Tammy Tong included information on nearly 50.000 patients between 1993 and 2001. Patients were then divided into 'carnivores' (24.428), 'pescetarians' (7.506), and 'vegans / vegetarians' (16.254).

2,820 cases of coronary artery disease (CHD) and 1.072 cases of heart attack occurred, including 519 cases of ischemia (when an obstructed blood vessel blocks the flow of blood and oxygen to the brain). 300 cases of hemorrhagic infarction completed the picture.

In summary

After taking into account the potential triggers (patient's medical history, smoking, use of supplements, physical activity) the result is that Pescetarians and vegetarians risk coronary heart disease respectively 13% less and 22% less than carnivores.

The difference, say the authors, may lie in the lower BMI body mass index and lower blood pressure.

Vegetarians
Some food supplements can lead to fewer health risks without touching the flavor aspect (and therefore the 'healthy' fat). The case of the "animal free" milk.
Vegetarians
even the butter developed with HIPE technology (it's made from 80% water) can serve the purpose

But there is also bad news

Probably for the same reasons vegetarians and vegans have a 20% greater risk of heart attack than 'carnivores'. The extremely low amount of cholesterol and other elements that are too deficient (vitamin B12, for example) can worsen the picture.

The conclusion of Tong is that "choosing to change diet to meet personal or environmental health reasons does not necessarily imply becoming vegetarian. For those who usually do not eat much meat it could be very useful to reduce consumption a little more, without eliminating it, and to support the body with more vegetable and vitamin supplements.

You can and must fight pollution without having to fight your own malnutrition or heart failure. "

Some clarifications that I feel like doing: this study does not primarily investigate the causes, but only observes the correlation. Finally, the correlations are not absolutely valid because the subjects considered are only European, Caucasian and from a particular nation, the UK, which has very specific eating habits. It will be necessary to refine the observation and understand if and how much correlation will also be found in other population groups, perhaps also considering other nutritional factors.

Tags: supplyAlimonyHealthveganVegetarians

To submit articles, disclose the results of a research or scientific discoveries write to the editorial staff

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