Plant vs Animal Protein: Head to Head

Some people will obviously have strong ideological opinions here—for vegetarians and vegans, it’s no question, and for meat-eaters, it’s easy to be reactive to that and double-down on the bacon. But, we’re a health science newsletter, so we’ll be sticking to the science.

Which is better, healthwise?

First, it depends on how you go about it. Consider these options:

• A piece of salmon
• A steak
• A hot dog
• A hot dog, but plant-based
• Textured soy protein (no additives)
• Edamame (young soy) beans

Three animal-based protein sources, three plant-based. We could render the competition simple (but very unfair) by pitting the hotdog against the edamame beans, or the plant-based hot dog against the piece of salmon. So let’s kick this off by saying:

• There are good and bad animal-based protein sources
• There are good and bad plant-based protein sources

Whatever you choose, keep that in mind while you do. Less processed is better in either case. And if you do go for red meat, less is better, period.

Picking the healthiest from each, how do the nutritional profiles look?

They look good in both cases! One factor of importance is that in either case, our bodies will reduce the proteins we consume to their constituent amino acids, and then rebuild them into the specific proteins we actually need. Our bodies will do that regardless of the source, because we are neither a salmon nor a soybean, for example.

We need 20 specific amino acids, for our bodies to make the proteins we will use in our bodies. Of these, 9 are considered “essential”, meaning we cannot synthesize them and must get them from our diet,

Animal protein sources contain all 9 of those (just like we do). Plant based sources often don’t, individually, but by eating soy for example (which does contain them all) and/or getting multiple sources of protein from different plants, the 9 can be covered quite easily with little thought, just by having a varied diet.

Meats are #1!

• They’re number 1 for nutritional density
• They’re number 1 for health risks, too

So while plant-based diet adherents may need to consume more varied things to get all the nutrients necessary, meat-eaters won’t have that problem.

Meat-eaters will instead have a different problem, of more diet-related health risks, e.g.

• Cardiovascular disease
• Metabolic disorders
• Cancers

So again, if eating (especially processed and/or red) meat, moderation is good. The Mediterranean Diet that we so often recommend, by default contains small amounts of lean animal protein.

Which is better for building muscle?

Assuming a broadly healthy balanced diet, and getting sufficient protein from your chosen source, they’re pretty equal:

• Vegan and Omnivorous High Protein Diets Support Comparable Daily Myofibrillar Protein Synthesis Rates and Skeletal Muscle Hypertrophy in Young Adults
• A mycoprotein-based high-protein vegan diet supports equivalent daily myofibrillar protein synthesis rates compared with an isonitrogenous omnivorous diet in older adults: a randomised controlled trial

(both studies showed that both dietary approaches yielded results that showed no difference in muscle synthesis between the two)

The bottom line is…

Healthwise, what’s more important than whether you get your protein from animals or plants is that you eat foods that aren’t processed, and are varied.

And if you want to do a suped-up Mediterranean Diet with less red meat, you might want to try:

A Pesco-Mediterranean Diet With Intermittent Fasting: JACC Review Topic of the Week

^This is from a review in the Journal of the American College of Cardiology, and in few words, they recommend it very highly