leucine

It can be caused by decreased intake of niacin or tryptophan,[1] and possibly by excessive intake of leucine.

Insulin stimulates the uptake of valine, leucine, and isoleucine into skeletal muscle, but not uptake of tryptophan.

Two 33g servings of whey protein can be converted to 1g of fat, just from leucine alone.

Furthermore, the diets were particularly limited by the essential amino acids lysine, the sulphur-containing amino acids, leucine and valine.

Calcium lactate can also form on the inside of cheese, but tyrosine and leucine crystals cannot.

In particular, proteins rich in the amino acid Leucine (such as whey) are actually more insulinogenic calorie for calorie than white bread.

Also leucine, valine, theobromine and methionine have evidence that they extend lifespan when restricted.

I believe that this is the modern longevity recipe from what we have learned so far from the mTOR/fasting/leucine/isoleucine/methionine research.

As for ketosis sparing muscles that comes from a wide range of effects like low insulin, preserved/increased GH/IGF-1, BHB-inhibited muscle proteolysis and low leucine oxidation.

Interesting how this is the opposed of fitness recommendations where it’s all about mTOR activation to build muscle with protein or even pure leucine supplements.

In fact, some amino acids (like leucine) can likely be a contributor of not just muscle gain, but also obesity because of how they work.

If you eat foods with low amounts of the amino acids methionine and leucine, you could significantly reduce age-related diseases and the risk for certain cancers.

It can only be stimulated to a certain extent at a given time (known as the “muscle full” effect), but if the leucine level remains chronically elevated until after the refractory period, it makes sense that another bout would trigger.

Studies revealed that this amino acid has a very low toxicity at pharmatological levels up to 8% of solution concentration in rats." "As a matter of fact, the three amino acids (Isoleucine, Leucine, and Valine) constitute nearly 70% of all the amino acids in the body's proteins.

Leucine to valine ratio is about 0.66 for chicken and 0.8 for beef.