The idea behind purified ingredient OpenSource diets is simple: each nutrient is supplied by a separate, purified ingredient. Because these ingredients are refined materials, each containing one nutrient, (as opposed to the less refined chow ingredients) this allowed research nutritionists to define the nutritional requirements of animals by selectively removing one nutrient at a time from the diet. This also means that the possible modifications one can make to an OpenSource diet are virtually limitless. This is also what continues to make OpenSource diets powerful research tools and why so many scientists have turned to them in recent years.
Typical Purified Ingredients