The Casein proteins are great from preventing you going into a catabolic mode that's why i like the mixture of whey and casein in my protein. Unfortunatly gym priced and protein prices have meant i have had to give up training while here until i find better income.
It might be a bit of a treck but the Golds gym in San Borja just off Jaxier Pardo is probably the best gym in Peru! There is also a mixed fighting club right next door for those into that as well.
There is also someone who makes custom made gym equipment in Surquillo close to the Maestro center, his webpage is powerfitnesspro.com. This might be handy for those looking to buy home or commerical gym equipment as he will basically copy any design you give him! This is definatly the option i'm looking into in the near future, so sc””w you over priced Peruvian gyms.....i win! Lol