Amino acid compositions and methods for the treatment of liver diseases

A dietary composition comprising:

• (a) L-leucine or a salt thereof, or a dipeptide or salt thereof, or tripeptide or salt thereof, comprising L-leucine;
• (b) an arginine amino acid entity chosen from:
• (i) L-arginine or a salt thereof,
• (ii) a dipeptide or salt thereof, or tripeptide or salt thereof, comprising L-arginine,
• (iii) ornithine or a salt thereof,
• (iv) a dipeptide or salt thereof, or tripeptide or salt thereof, comprising ornithine,
• (v) creatine or a salt thereof, or
• (vi) a dipeptide or salt thereof, or tripeptide or salt thereof, comprising creatine;
• (c) L-glutamine or a salt thereof or a dipeptide or salt thereof, or tripeptide or salt thereof, comprising L-glutamine;
• and
• (d) N-acetylcysteine (NAC) or a salt thereof or a dipeptide or salt thereof, or tripeptide or salt thereof, comprising NAC;
• wherein when the dietary composition is in powder form, at least 50 wt. % of the total wt. of the dietary composition is one or more amino acid entities in free form,
• wherein the total wt. % of (a)-(d) is greater than the total wt. % of other amino acid entities in the dietary composition,
• wherein the dietary composition is chosen from a nutritional supplement, dietary formulation, functional food, medical food, or beverage.