Cholesterol levels are a risk factor for coronary heart disease, still one of the biggest killers in the west. Studies show that levels are lower in vegans than in the standard population.
“ A 10% decrease in total blood cholesterol levels can reduce the incidence of heart disease by as much as 30%.Centers for Disease Control and Prevention (CDC)
In October 2015, the Journal of the American Heart Association published a systematic review and meta-analysis of randomized controlled trials on the effects of vegetarian diets on cholesterol levels. In the study the commonest diet was vegan. The study concluded that:
‘This systematic review and meta‐analysis provides evidence that vegetarian diets effectively lower blood concentrations of total cholesterol, low‐density lipoprotein cholesterol, high‐density lipoprotein cholesterol, and non–high‐density lipoprotein cholesterol. Such diets could be a useful nonpharmaceutical means of managing dyslipidemia, especially hypercholesterolemia’.
Hypercholestrolemia is another word for high cholesterol.
Another study, in European Journal of Clinical Nutrition February 2014, was a cross-sectional analysis of 424 meat-eaters, 425 fish-eaters, 423 vegetarians and 422 vegans. It showed that cholesterol levels in vegans were the lowest of the four groups. Although this difference could be explained by the fact that vegans were, on average, the least overweight, the study concluded that the biggest difference was due to diet:
“In this study, which included a large number of vegans, serum total cholesterol and apolipoprotein B concentrations were lower in vegans compared with meat-eaters, fish-eaters and vegetarians. A small proportion of the observed differences in serum lipid concentrations was explained by differences in BMI, but a large proportion is most likely due to diet.”European Journal of Clinical Nutrition 2014 Feb
Similarly, a meta-analysis that examined 30 observational studies and 19 clinical trials – published in 2017 in Nutrition Reviews – found that plant-based diets were associated with decreased total cholesterol, low-density lipoprotein (LDL) cholesterol, and high-density lipoprotein (HDL) cholesterol.