A method for preparing polyolefins with low gel content and enhanced gas-fading by adding to the polyolefin a composition comprising: a sterically hindered phenol; and a phosphite composition comprising at least two different phosphites selected from: (i) a tris(dialkylaryl)phosphite selected from tris(2,4-di-tert-amylphenyl)phosphite and tris(2,4-di-tert-butyl-phenyl)phosphite, (ii) a tris(monoalkylaryl)phosphite selected from tris(4-t-amylphenyl)phosphite and tris(4-t-butyl-phenyl)phosphite, (iii) a bis(dialkylaryl)monoalkylaryl phosphite selected from bis(2,4-di-tert-amyl-phenyl)-4-t-amyl-phenyl phosphite and bis(2,4-di-tert-butyl-phenyl)-4-t-butyl-phenyl phosphite, and (iv) a bis(monoalkylaryl)dialkylaryl phosphite selected from bis(4-t-amylphenyl)-2,4-di-t-amyl-phenyl)phospite and bis(4-t-butyl-phenyl)-2,4-di-t-butyl-phenyl)phosphite; wherein the phosphite composition is a liquid at ambient conditions and wherein the sterically hindered phenol has the structure of compound I: wherein: x is independently 0, 1, 2, or 3; R 1, R 2, and R 3 is independently hydrogen, C 1 -C 12 alkyl, and C 5 -C 10 cycloalkyl, provided that at least one of R 1, R 2, and R 3 is not hydrogen, or wherein the sterically hindered phenol has the structure of compound II: wherein: x is independently 0, 1, 2, or 3; R 1, R 2, and R 3 is independently hydrogen, and C 1 -C 12 alkyl, and C 5 -C 10 cycloalkyl, provided that at least one of R 1, R 2, and R 3 is not hydrogen; and R 4 is independently C 1 -C 6 alkyl. a sterically hindered phenol; and a phosphite composition comprising at least two different phosphites selected from: (i) a tris(dialkylaryl)phosphite selected from tris(2,4-di-tert-amylphenyl)phosphite and tris(2,4-di-tert-butyl-phenyl)phosphite, (ii) a tris(monoalkylaryl)phosphite selected from tris(4-t-amylphenyl)phosphite and tris(4-t-butyl-phenyl)phosphite, (iii) a bis(dialkylaryl)monoalkylaryl phosphite selected from bis(2,4-di-tert-amyl-phenyl)-4-t-amyl-phenyl phosphite and bis(2,4-di-tert-butyl-phenyl)-4-t-butyl-phenyl phosphite, and (iv) a bis(monoalkylaryl)dialkylaryl phosphite selected from bis(4-t-amylphenyl)-2,4-di-t-amyl-phenyl)phospite and bis(4-t-butyl-phenyl)-2,4-di-t-butyl-phenyl)phosphite; wherein the phosphite composition is a liquid at ambient conditions and wherein the sterically hindered phenol has the structure of compound I: wherein: x is independently 0, 1, 2, or 3; R 1, R 2, and R 3 is independently hydrogen, C 1 -C 12 alkyl, and C 5 -C 10 cycloalkyl, provided that at least one of R 1, R 2, and R 3 is not hydrogen, or wherein the sterically hindered phenol has the structure of compound II: wherein: x is independently 0, 1, 2, or 3; R 1, R 2, and R 3 is independently hydrogen, and C 1 -C 12 alkyl, and C 5 -C 10 cycloalkyl, provided that at least one of R 1, R 2, and R 3 is not hydrogen; and R 4 is independently C 1 -C 6 alkyl. (i) a tris(dialkylaryl)phosphite selected from tris(2,4-di-tert-amylphenyl)phosphite and tris(2,4-di-tert-butyl-phenyl)phosphite, (ii) a tris(monoalkylaryl)phosphite selected from tris(4-t-amylphenyl)phosphite and tris(4-t-butyl-phenyl)phosphite, (iii) a bis(dialkylaryl)monoalkylaryl phosphite selected from bis(2,4-di-tert-amyl-phenyl)-4-t-amyl-phenyl phosphite and bis(2,4-di-tert-butyl-phenyl)-4-t-butyl-phenyl phosphite, and (iv) a bis(monoalkylaryl)dialkylaryl phosphite selected from bis(4-t-amylphenyl)-2,4-di-t-amyl-phenyl)phospite and bis(4-t-butyl-phenyl)-2,4-di-t-butyl-phenyl)phosphite; wherein the phosphite composition is a liquid at ambient conditions and