Hi r/nutrition, help me find a good value for g of protein per calories in order to categorize food stuff as “high protein”. Do you think 10g/100 cal is a good baseline? Used especially for snacks, like puddings, bars, etc, to filter out the low quality stuff without having to count/multiply anything not already on the label. What kind of similar measures do you use to determine if something really falls under the “high protein” umbrella? Or is this categorization not as useful for some reason?
Thought this would be some good info for people who are interested in longevity. Protein restriction, specifically methionine can be great for your health in the long run.
https://www.ncbi.nlm.nih.gov/pmc/articles/
> …however, MetR can induce increased H2S production through this pathway. Similarly, MetR can increase the production of polyamines such as spermidine, which are involved in autophagy. In addition, MetR decreases oxidative stress by inhibiting reactive oxygen species production in mitochondria. Thus, MetR can attenuate oxidative stress through multiple mechanisms, consequently associating with lifespan extension and metabolic health.
So slamming back protein rich food may be missing out on some of these advantages. So far the research has used a lot of mice, but its looking like these results can also be applied to humans as well.
https://pubmed.ncbi.nlm.nih.gov/31367041/
> In a controlled and tolerated feeding study in humans, methionine restriction resulted in effects on systemic metabolism that were similar to those obtained in mice.
They’ve already seen good results on specific human cells.
https://www.pnas.org/doi/10.1073/pnas.2110387118
> In fact, methionine restriction (MetR) extends lifespan in yeast, flies, rodents, and human diploid fibroblasts (14–17) and exerts beneficial effects on metabolic health and inflammatory responses (18–20).
Naturally, if you (the person who is reading this) are already eating a high protein diet I don’t expect you to change based just on this. But if you are eating a lower protein diet and thinking of adding more protein for the supposed health benefits, it might be worth your time to read about this field.
Note. Legumes, particularly lentils, are low in methionine when looking at amino acid profiles so its fine to eat on a methionine restricted diet.