Here's the Frog Brittle profile by Nasco (who makes turtle Brittle)
my guess is its pretty similar to the turtle food:
(i remember i looked it up once but i guess we can't do that now)
Vitamin Content of NASCO Xenopus Frog Brittle
Vitamin A, 14000 I.U. per kg
Vitamin D, 5000 I.U. per kg
Vitamin E, 88 I.U. per kg
Vitamin B12, 0.04 mg per kg
Folic Acid, 1.5 mg per kg
Thiamine, 4.0 mg per kg
Riboflavin, 9.0 mg per kg
Pantothenote Acid, 11.0 mg per kg
Niacin, 60.0 mg per kg
Choline, 1550 mg per kg
Calcium, 2.0%
Phosphorus, 1.6%
Sodium chloride, 1.2%
Magnesium, 2%
Linoleic Acid, 2.8%
Iron, 300 mg per kg
Copper, 10 mg per kg
Cobalt, 2.2 mg per kg
Manganese, 9.0 mg per kg
Zinc, 100 mg per kg
Iodine, 48 mg per kg
Pyridoxine, 8.8 mg per kg