The leucine limits in circulation come from industry-funded work
No health agency has set an upper intake level for any amino acid. The figures quoted, 35 g a day for young adults and 30 g for older ones, come from that programme.
What the study found
Of the three branched-chain amino acids, only leucine has a limit
No health agency anywhere has set an upper intake level for any amino acid. The figures in circulation, 35 g of leucine a day for young adults and 30 g for older ones, come from a dose-finding programme run by an industry-funded nonprofit. Isoleucine and valine were never studied.
The caveat · Short trials in healthy adults only
These numbers come from a programme run under the International Council on Amino Acid Science, a nonprofit funded by the amino acid industry. The review says so itself. Short-term trials in healthy adults only, so nothing about long-term intake or about people with liver or kidney disease.
What we don't know
These numbers come from a programme run under the International Council on Amino Acid Science, a nonprofit funded by the amino acid industry. The review says so itself. Short-term trials in healthy adults only, so nothing about long-term intake or about people with liver or kidney disease.