Comment by reissbaker
2 days ago
Beef has ~3x more protein per gram than legumes. It is much more protein-dense than vegetables or legumes.
Similarly, it's a "complete" protein, whereas most vegetables and legumes are missing necessary amino acids.
The downside of beef isn't the "density" of nutrients: the downside is high saturated fat. Chicken breast, though, is similarly high in protein without the saturated fat downside.
> most vegetables and legumes are missing necessary amino acids
In practice, there's no evidence of amino acid deficiency in vegans/vegetarians except ones that restrict even further (potato diet, fruitarians, etc) https://pmc.ncbi.nlm.nih.gov/articles/PMC6893534/
Besides the ever-popular soybean being a complete protein, if you have normal variety in your diet, it's just not something you have to worry about.
>In practice, there's no evidence of amino acid deficiency in vegans/vegetarians
That is not what your linked article says. It says there is not evidence of protein deficiency, and the deficiency of amino acids is overstated. Not that there is no deficiency.
And vegan/vegetarian health is really a 2nd order variable here. Vegans and vegetarians could have massive amino acid surpluses and it remains a fact that vegetable proteins lack useful amino acids that meat has. Maybe the vegetarians are eating lots of eggs. Maybe they are taking lots of supplements. Maybe they are actually eating meat despite calling themselves vegans and vegetarians. It doesn't matter. There really is no disputing the fact about the composition of meat/vegetable protein.
> a fact that vegetable proteins lack useful amino acids that meat has.
This isn't a problem since you only need nine essential amino acids and they are present in adequate quantity in various vegetables and shrooms. The others are synthesized by ones body.
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The fat is an excellent source of energy though and it's very hard to get fat by eating fat because it's essentially hormonally inert. I.e. eating fat doesn't precipitate insulin which is the hormone that enables body fat accumulation.
So the problem with steak isn't the steak itself it's the "steak dinner" where the meat comes with sides such as french fries and drinks such as beer.
> Beef has ~3x more protein per gram than legumes
Missing amino acids isn't a problem IRL as people tends to eat different stuff.
Eating only one type of food is not good for your health, whether it is a plant or animal product.
> The downside of beef isn't the "density" of nutrients: the downside is high saturated fat.
There are other downsides to beef .. such as the batshit crazy use of ecosystems and resources required to produce it at industrial scale.
Got a (beef) cow roaming in your yard, somehow getting by on whatever grows out of the ground? Enjoy your steak! Generating 6x the calories via a water-intensive cover crop to feed the cow so you can eat it later? Just say no.
This is orthogonal to nutritious eating habits; I don't think the food pyramid should lie about nutrition due to ecological concerns. (I do think the food pyramid should be a little more concerned about saturated fat than it is, though — which is why I called out chicken as an alternative, and elsewhere also mentioned fish.)
Worth noting that like amino acids there are essential fatty acids as well, and most people have poor nutrition there... red meat isn't "only" saturated fat, but a fairly balanced fatty acid profile. You can have too much, but in moderate cuts it isn't too bad.
I usually suggest around 0.5g fat to 1g protein as a minimal, higher if keto/carnivore.
That's true, although fish has a better balance of essential fatty acids than red meat. Although, oddly enough, wagyu has a (much) better fatty acids profile than other types of beef, so you can justify the occasional wallet splurge on health grounds!