Quote:
a long-term diet that's low in carbohydrates and high in fat and protein from vegetables
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To me this whole phrase is contradictory, and worded clumsily, without what I'd consider to be the necessary punctuation for it to make sense.
If you're eating a diet high in protein from vegetables, you're not going to be eating low carb. Even using a plant based food that is high in both fats and protein (high for plant matter, that is), such as soybeans (which is not technically even a vegetable, but actually a legume), a 1 cup serving has 28 g protein and 15 g of fat. But that's not enough protein, you would need at least 2 cups of soybeans daily, most likely 3 cups of them to get sufficient dietary protein. That would still only give you at most 45 g of fat, hardly what I'd consider to be high fat. But at 17 g carbs per cup, by the time you eat 3 cups of them, you're already up to 51 g of carbs. if you rely on plant based food for your protein and fats, you're not going to be eating low carb. If your plant based diet is truly low carb, then you could always add additional plant based oils to increase your fats, but you're not going to be eating high protein. (unless you're eating large amounts of spirunlina, which apparently has 2 g protein/teaspoon. So you think great - add a couple of tablespoons to each plant based meal, and you'll be getting plenty of protein! But it apparently tastes so bad that they aren't able to tolerate eating more than about about 1 tsp of it)
Reading the rest of the article, seems it was an observational study based on food recall questionnaires (which are notoriously unreliable). But it does seem that they studied the glaucoma incidence rates between those on a plant based low carb diet, compared to an animal based low carb diet.
The real question then becomes what do they consider to be low carb with high fat and high protein? Obviously not what most of us on here would consider to fit that description, because the combination of low carb diet which is truly high fat, and high in protein would be nearly impossible to achieve on a truly plant based diet.