TABLE 1.
Nutrient composition of animal diets1
| NIH-31 | NIH-31/NIA fortified | |
|---|---|---|
| Protein, g/kg | 184.20 | 187.40 |
| Fat, g/kg | 44.70 | 44.10 |
| Fiber, g/kg | 40.50 | 45.80 |
| Gross energy, kJ/g | 16.82 | 16.53 |
| Ash, g/kg | 66.40 | 65.10 |
| Nitrogen-free extract, g/kg | 559.10 | 550.40 |
| Amino acids, g/kg | ||
| Arginine | 10.60 | 11.00 |
| Methionine | 3.90 | 3.60 |
| Histidine | 4.10 | 4.20 |
| Leucine | 16.10 | 15.00 |
| Lysine | 9.50 | 9.60 |
| Tryptophan | 2.40 | 2.20 |
| Valine | 9.60 | 8.80 |
| Cystine | 2.80 | 2.60 |
| Isoleucine | 9.00 | 7.60 |
| Threonine | 7.10 | 7.10 |
| Phenylalanine | 9.20 | — |
| Tyrosine | 7.00 | — |
| Phenylalanine + tyrosine | — | 15.30 |
| Vitamins | ||
| Retinyl acetate, mg/kg | — | 13.93 |
| 3-hydroxy retinol, mg/kg | 10.57 | — |
| Cholecalciferol, μg/kg | 10.48 | 17.50 |
| dl-α-Tocopheryl acetate, mg/kg | 38.30 | 52.15 |
| Choline, mg/g | 1.96 | 2.60 |
| Niacin, mg/kg | 92.20 | 116.16 |
| Pantothenic acid, mg/kg | 39.50 | 55.07 |
| Pyridoxine, mg/kg | 10.20 | 13.16 |
| Riboflavin, mg/kg | 7.80 | 11.04 |
| Thiamine, mg/kg | 77.30 | 123.44 |
| Menadione, mg/kg | 22.00 | 111.01 |
| Folic acid, mg/kg | 1.70 | 2.13 |
| Biotin, mg/kg | 0.13 | 0.38 |
| Cobalamin, μg/kg | 53.00 | 93.80 |
| Minerals | ||
| Calcium, g/kg | 10.60 | 10.30 |
| Phosphorus, g/kg | 9.20 | 9.30 |
| Sodium, g/kg | 2.60 | 3.00 |
| Chlorine, g/kg | 4.20 | 4.80 |
| Potassium, g/kg | 5.90 | 5.90 |
| Magnesium, g/kg | 2.00 | 2.00 |
| Iron, mg/kg | 300.20 | 336.41 |
| Manganese, mg/kg | 152.80 | 156.01 |
| Zinc, mg/kg | 50.40 | 48.41 |
| Copper, mg/kg | 13.20 | 13.28 |
| Iodine, mg/kg | 1.94 | 2.01 |
| Cobalt, mg/kg | 0.53 | 0.53 |
| Selenium, mg/kg | — | 0.30 |
1
Provided by the National Institute on Aging and Harlan Teklad. Ingredients: ground wheat, ground corn, ground oats, wheat middlings, fish meal, soybean meal, corn gluten meal, dehydrated alfalfa meal, soybean oil, dicalcium phosphate, brewers dried yeast, salt, calcium carbonate, choline chloride, menadione sodium bisulfite complex, thiamine mononitrate, calcium pantothenate, tocopheryl acetate, retinyl acetate, riboflavin, Cobalamin supplement, niacin, cholecalciferol supplement, pyridoxine HCl, folic acid, biotin, magnesium oxide, ferrous sulfate, manganous oxide, copper sulfate, zinc oxide, calcium iodate, and cobalt carbonate.