Fecha de publicación: 12/01/2023 Fuente: Wipo Milk or dairy products [Problem] Provided is a composition which can be easily ingested and which can increase muscle mass. [Solution] This composition for increasing muscle mass contains (A) guar gum degradation products with an average molecular weight of 1.8 × 103 to 2.0 × 105 and with at least 70 mass% thereof being within this range, and (B) a guar bean protein, the viscosity of a 1 mass% water solution of the composition, measured at 25°C and 60 rpm using a B-type viscometer, is less than or equal to 50 mPa*s, the guar gum degradation products are contained in endosperm derived from guar, and the composition is obtained by using microbe-derived β-mannanase to hydrolyze and reduce the molecular weight of galactomannan polysaccharide that has a galactose and mannose content ratio (galactose:mannose) in the range 1:1.5-1:2.1, wherein the dietary fiber content, specified by enzymatic-HPLC method, is at least 70 mass%, the content of oligosaccharides of the guar gum degradation products is less than or equal to 15 mass%; of the amino acid compositions in the contained proteins, (glutamic acid + glutamine + aspartic acid + asparagine) ≥ 100 g/100g, (cystine + tyrosine + serine + threonine) ≥ 40mg / 100g, all amino acids ≥ 150mg/100g, and the ratio (A)/(B) is less than or equal 1000.