Vegan Protein Debate

The cluster centers on debates about whether plant-based diets provide sufficient complete proteins, essential amino acids, and nutrients compared to animal products, with proponents citing vegan athletes and health markers while critics highlight bioavailability and supplementation needs.

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Keywords

e.g pubmed.ncbi US BP gstatic.com B12 D3 FUD academic.oup GI protein diet meat vegan amino nutrients acids animal food supplements

Sample Comments

pencilguin Oct 28, 2022 View on HN

Hint: you do not need to eat any meat to get plenty of protein.

toomuchtodo Jun 16, 2015 View on HN

Jokes on you. I know powerlifters who are deadlifting hundreds of lbs, and they only consume a vegan plant-based diet (google "vegan powerlifting").Animal proteins are an inefficient method of consuming nutrients. You may like meat, but its not efficient, and data has shown that it can cause cancer in your GI tract given enough time.EDIT: There's a reason Soylent is vegan; not to appease animal lovers, but because its healthier for you and more efficient.[1] <a hre

jfritsch1984 Mar 15, 2020 View on HN

I think it is not productive to have this discussion. I have good blood markers after 6 years on this diet. LDL of 52. BP of 101/74. So for me this diet is way healthier than the omnivorous diet that I had before. If you want to believe that animals are essential for human health, go on. But in my opinion science does not back this up. But that is my interpretation.Your thoughts on bioavailability are also outdated. It has been shown for protein, iron and some vitamins that bioavailabili

windexh8er Mar 4, 2018 View on HN

The protein argument is probably one of the worst of the food uneducated. I could flip your argument and ask about actual nutrition. What vitamins, minerals, amino acids, etc does meat provide? Very few.Protein? Peas, quinoa, beans, nuts, tempeh, leafy greens, seeds, and the list goes on. The difference is something like quinoa is that, compared to any meat, it is calorie for calorie more nutritionally complete.Finally why are you focused on protein to begin with? And how much protein is r

saiya-jin Apr 22, 2023 View on HN

Maybe things have changed but when I was a bit into weightlifting maybe a decade ago, common knowledge back then was that some forms of protein (ie amino acids mix of specific types and ratios) can't be realistically substituted by normally eating humans. I mean unless you want to prepare all your meals with scales.Its not about theory on paper, but what people actually eat on a given diet and how their body looks long term. Its a fact that ie vegans lack: B12, D3, iron, taurine, creatin

If you tried to get all your calories from eating eggs, your diet would have too much fat and not enough carbs. In reality you need a balanced and varied diet, and the world couldn’t support 7 billion people all deciding to get their protein intake from one specific food item anyway. Animal products are simply better at providing the protein you need. You _can_ get all of it from plant based sources (I’m not sure whether it would be theoretically possible for all humans to adopt such a diet), bu

Cthulhu_ Jan 8, 2026 View on HN

At least the page mentions alternatives - plenty of other sources of protein, like dairy, eggs, legumes, etc.

meepmorp Apr 21, 2013 View on HN

You can't fully replace meat nutritionally? Any source for this assertion?

SaddledBounding Oct 28, 2022 View on HN

It's because the grandparent comment has misconceptions about nutrition, including that animal products are necessary for a healthful diet and how much protein is required for a healthful diet.The first misconception is contradicted by extensive analysis by health organizations such as [Academy of Nutrition and Dietetics][1]. Healthful vegan diets are no less healthful than healthful non-vegan diets.The second misconception is about how much protein is needed in a healthful diet. Many

adrian_b Jul 31, 2022 View on HN

You need to supplement vegetables with many substances that are not required when eating enough animal food.However, when buying food that is labelled as vegan this is not always obvious, because it might already include various supplements, and also some of the supplements required by vegetable food can be obtained from minerals, so it is easy to get them while avoiding animal sources.The most important substances that are not contained in adequate quantities in vegetables: vitamin B12, v