Peter Attia· MD
this is one of my favorites um by dr brittany volk that was published a while ago and it's really great because this was a feeding study so you know they kept track of what the patients were eating it wasn't a free-for-all are they eating what they're were telling them to eat or not they provided all of their food and this was patients with metabolic syndrome they went through six feeding phases and so they did a run in with a very low carbohydrate diet for everyone less than 50 grams of carbohydrates a day and every three weeks they increased the carbohydrates in the diet all the way up to a 346 grams which was c6 feeding phase the other thing to note here is the saturated fat content so when we were at the low carbohydrate end here in c1 they were consuming 84 grams of saturated fatty acids a day okay so that blows away any um guideline on saturated fat i mean so far above what anyone would consider at goal and then we get down to the c6 and we're much less 32 grams again what happens to the fatty acids as people are run through these six phases and sarah just to be clear this is basically an isocaloric feeding study which means as you're ratcheting up the content of carbohydrate you're commensurately reducing at a caloric level the amount of saturated fat right i believe this study did not change the number of calories they were consuming or did it correct they did not okay and so what happened um to the um saturated fatty acid levels in the blood and for that matter others other fatty acid levels in the blood so what happened over these six phases okay so here we have saturated fatty acid levels marked okay so here's the baseline at that run-in okay and we see when we have the very high saturated fat level very low carbohydrate okay here we go and what's really interesting is what happens as we march along here down to c6 and if you remember this is much lower saturated fatty acid content of the diet okay much higher carbohydrate intake what we see is that it's actually the saturated fatty acid content is actually higher with the lower saturated fat intake