It does read to me like this means 5 days of total fasting. If the 5 fasting days were spread out, then what did the participating subjects eat on non-fasting days before the "everyday food items" were reintroduced?
I don't have access to the paper and couldn't find a preprint so I cannot check beyond what is in the UPI article.
I don't have access to the paper and couldn't find a preprint so I cannot check beyond what is in the UPI article.