It was a sw consultant who advised breaking every 3 days of doing red. She had said that it didn't mean doing a completely meat free day but sticking to a green day when the meat would be a healthy extra or syned is the right option.
I tend to agree with this because too much red meat is damaging to our kidneys and has other effects. Look at the effects of Atkins diet.
Maybe I am not being understood correctly but it is advised if red is your preference you would say for example have, mon red, tues red, wed red, thurs green, fri red, sat red, sun red, mon green.