Selenium Yeast and Sodium Selenite

Selenium Yeast and Sodium Selenite appears on the labels of 205 of the 244 recipes we have read and scored (84 percent of the database), in label forms including Sodium Selenite, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Manganese Sulfate, Calcium Iodate, Sodium Selenite), Minerals (Ferrous Sulfate, Zinc Oxide, Sodium Selenite, Manganese Sulfate, Copper Sulfate, Potassium Iodide, Manganous Oxide), Minerals (Zinc Sulfate, Ferrous Sulfate, Copper Sulfate, Manganese Sulfate, Potassium Iodide, Sodium Selenite), MINERALS (ZINC AMINO ACID CHELATE, IRON AMINO ACID CHELATE, COPPER AMINO ACID CHELATE, MANGANESE AMINO ACID CHELATE, SODIUM SELENITE, COBALT AMINO ACID CHELATE, POTASSIUM IODIDE) and 25 more label forms.

What it is

The two routes for adding selenium, an essential trace element with a narrow safe band: grown into yeast, or as the mineral salt.

Why makers use it

Base ingredients vary in selenium with the soil they grew in, so the level is set deliberately.

What to watch for

Selenium is the panel's clearest case of more is not better; reputable makers control it tightly, and excess has caused real recalls in the industry.

Highest scoring recipes that carry it

The full database, filterable by brand, format, life stage and grains, is the reviews index; the food finder answers it by the proteins a dog must avoid.

Often on the same panels

Vitamin Supplements (the Vitamin Pack), Choline Chloride, Salt, Natural Flavor. The full dictionary is the ingredient index.