Mark me down as someone who has used Mazuri and has come to the conclusion that it hasn't killed my tortoises yet.
Meaning that I can't tell if it helps or hurts. It's a manufactured food product. Something made out of foods not generally consumed by tortoises (soy and grains) that is then loaded up with vitamins and minerals to overcome the shortcomings of soy and grains.
It seems that if I pay attention to how much my tortoises weigh and how fast they are growing, then a little Mazuri once or twice a week doesn't seem to do any harm. I've noticed that if I feed it more often, or feed them more per meal, then their weight can increase rapidly.
So I'll continue to use it as a supplement, as an easy way to get some fiber and calcium into my torts especially during the winter when weeds are scarce. When weeds are available, then I barely use the Mazuri, and the tortoises eagerly consume the weeds.
But if Mazuri went out of business tomorrow, I would not shed a tear. It's only a product that to me appears marginally different from other canned tortoise foods or even items marketed for herbivorous mammals.
Now if you could tell us with some detail what are the good results you see from using Mazuri, that would be very helpful.
Sincerely,
Regular but unenthusiastic user of Mazuri tortoise chow