Which anatomical study is that? The ones I've seen shows that our digestive systems are short and similar to cats and dogs which are carnivores. Very different from apes which are longer and allow fibre to ferment into long chain fatty acids. Our short intestines can't do that so fibre just ends up being an irritant which bulks up stool and makes you go everyday for no reason. Fibre is also an antinutrient which blocks nutrient absorption. Never mind the fact that greens are full of oxolates, lectins, tannins and hundreds of other known toxins.

Our stomach acid is also more acidic than known carnivores, cats and dogs but less acidic than vultures.

Also, human remains from before the agricultural revolution (13k years ago) , show from the level of nitrogen isotopes than we primarily ate meat. It also shows that humans were significantly taller, larger skulls with 11% larger brains. Plus there were very few bone lesions meaning that disease was minimal. Humans back then wouldn't eaten whatever they could find to survive if hunting was scarce. So that's when they would've dug up legumes but it's nothing like the manufactured sugar infused fruit and veg that is abundant in shops today.

Now, as with all carnivores, we can eat and survive on other foods but that doesn't mean they're good for us. We thrive on meat and fats. Just like the easy we've fed our carnivore pets our toxic food so that they've developed the same diseases we get. This doesn't happen when in the wild they instinctively eat their species appropriate diet.

Isn't it time we did the same as the people of this world are just becoming more obese, more ill, more depressed and more hopeless on the standard omnivore diet. Especially when many of us have tried the carnivore lifestyle which has enabled us to become much, much healthier. So forgive us from shouting it's benefits to the world too loudly.