INS and myopathy: Sugars causing a glucose and insulin response are also of interest in equine nutrition, especially for horses with insulin dysregulation (Frank et al., 2010; Lindåse et al., 2016), pituitary pars intermedia dysfunction (McGowan, 2008) or polysaccharide storage myopathy (Firshman et al., 2003; Borgia et al., 2011).