By Bethany Wales The company behind fitness supplement brand Myprotein has revealed a new partnership with Mike Ashley’s Frasers Group which will see its products available in-store at Sports Direct. THG, which owns brands including Myprotein and City A.M., said the new partnership would help to grow its offline presence amid a major rebrand of the nutrition business. The company said that rebranding across the Myprotein range was progressing well, with around 80 per cent of products planned to be under new branding by the end of Q3 2024. It added that offline retailers were responding “especi…