This is the true M - Mazuri, go to website & google related info / a lot of research & forums. Defintitly NOT Zoomed. http://www.mazuri.com/mazuritortoisediet.aspx
M is NOT what the picture showed by seira224527.
R is a easy to convert your tortoises to 龜糧.
M is good for growth, but sometimes too heavy for digestion system.
Sudo is another brand you can consider, good for their intestine system.