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[Music] People who are on low-carb diets may not see an increase in their cholesterol levels as that is possible because by losing weight anyway, we can lower our cholesterol; we could go on an all Twinkie diet and lower our cholesterol if we weren't able to eat the dozen Twinkies a day it takes to maintain our weight that's why a good cocaine habit can lower cholesterol chemotherapy can lower cholesterol like a rocky tuberculosis can do wonders for someone's waistline anything that lowers our weight can lower our cholesterol but the goal isn't to fit into a skinnier coffin the reason we care about cardiovascular risk factors like cholesterol is because we care about the cardiovascular risk of the health of our arteries well we now have studies that have measured the impact of low carb diets on the arteries directly and a review of all the best studies done to date found that low carb diets impair arterial function as evidenced by a decrease in flow mediated dilation meaning low carb diets effectively cripple people's arteries and since the meta analysis was published another study found the same eating pattern characterized by high protein and low fat carbohydrates associated with small peripheral arteries poorer function again measuring blood flow to the peripheral circulation of people's limbs is great but what about circulation in the coronary arteries that feed our hearts there has only been one study measuring actual blood flow to the heart muscles of people eating low carb diets and that's it dr. Richard Flemming talented nuclear cardiologists enrolled 26 people in a large study of the effects of diet on heart function using the latest in imaging technology called SPECT scanning allowing him to actually measure blood flow within the coronary arteries and then put them all on a healthy vegetarian diet and a year later the scans were repeated for that time however 10 of the patients jumped ship to the low carb bandwagon at first I bet he was upset but surely he soon realized that he had an unparalleled research opportunity dropped into his lap here he had extensively looked at ten people following a low carb diet and 16 following a high carb diet how their hearts would look at the end of the year we can talk about risk factors all we want but compared to the vegetarian group did the coronary heart disease of the patients following the Atkins as improved diets get worse or stay the same those following the vegetarian diet showed a reversal of their heart disease as expected their clogged arteries of parsley literally were cleaned had 20% less after Scott ik plaque in their arteries at the end of the year so in the beginning what happened to those who abandoned the treatment died and switched to the low carb diet, their condition worsened significantly 40 to 50% more arterial obstruction at the end of the year thanks to the kind generosity of dr. Fleming, we can actually see the changes in blood flow for us, here are some representative images of the heart in yellow and particularly the red represents the blood flow through the coronary arteries to the heart muscle, this patient was on a plant-based diet and the coronary arteries opened up to increase blood flow, but this person started out with good flow but after a year on a low-carb diet it significantly obstructed arterial blood flow, this is the best science to date demonstrating the threat of low-carb diets, not just measuring risk factors but the actual blood flow in the hearts of people on different diets of course the reason we care about cardiac blood flow is we don't want to die and a meta-analysis was published recently that finally went ahead and measured the final endpoint death and low-carb diets were associated with significantly higher risk of all-cause mortality, meaning the sculptor is living a significantly shorter lifespan you [music] you guys
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