These diet examples are from a series of diets with the following features: casein-based, isocaloric (3.8 kcal/g) and matched for fat (5.5%), calcium (0.7%), and phosphorus (0.54%). There are other diets available from this series of diets, as well as other unique protein adjusted diets.

Casein is the most widely used refined protein source, but it is also possible to use other refined protein sources, such as “vitamin-free” test casein (alcohol extracted), lactalbumin, isolated soy protein, and egg white solids. These particular protein sources are usually used to achieve a specific research objective, rather than for routine use. For instance, vitamin-free test casein is most appropriately used in vitamin deficient diets, and egg white solids is most suitable for zinc or biotin deficient diets.

Adjusted protein diets usually range from “protein-free” (trace) to 60% protein, depending on the research.

这些饮食示例来自一系列具有以下特点的饮食：以酪蛋白为基础、等热量 (3.8 kcal/g) 并与脂肪 (5.5%)、钙 (0.7%) 和磷 (0.54%) 相匹配。 这一系列饮食中还有其他饮食可供选择，以及其他独特的蛋白质调整饮食。

酪蛋白是最广泛使用的精制蛋白质来源，但也可以使用其他精制蛋白质来源，例如“无维生素”测试酪蛋白（酒精提取）、乳清蛋白、大豆分离蛋白和蛋清固体。 这些特定的蛋白质来源通常用于实现特定的研究目标，而不是常规使用。 例如，不含维生素的测试酪蛋白最适合用于缺乏维生素的饮食，而蛋清固体最适合用于缺乏锌或生物素的饮食。

调整后的蛋白质饮食通常范围从“无蛋白质”（微量）到 60% 的蛋白质，具体取决于研究。