sodium selenite
Sodium selenite is the standard selenium — an essential antioxidant mineral with nutrition's narrowest safety window, dosed accordingly and best left formulated.
What it is
The inorganic workhorse form of selenium, cofactor of glutathione peroxidase — cellular antioxidant defense's keystone enzyme. Selenium's defining trait is its window: the gap between required and harmful is the narrowest in mineral nutrition.
Why it's in pet food
Meeting an absolute requirement with an exact dose. The narrow window is precisely why formulated delivery beats every improvised alternative — and why selenium is a mineral to never supplement at home.
How Bowlmark scores it
Scores are deterministic math over the printed label — the rules below apply to every product identically, and nothing estimates or fills in a blank.
Neutral — the engine can't read micrograms and doesn't pretend to. Reading advice in one line: selenium on a label is a premix doing its job; selenium in a shopping-cart supplement is a risk no healthy pet needs. The selenium yeast page covers the organic-form alternative.
Common questions
Answers come from this entry and the scoring rules above — reviewed before publish, like everything else on this page. For anything about your own pet, your vet knows best.
Is sodium selenite dangerous in pet food?
It is the inorganic workhorse form of selenium — an essential antioxidant mineral whose defining trait is nutrition's narrowest safety window between required and harmful. That window is precisely why formulated delivery beats every improvised alternative: selenium on a label is a premix doing its job with an exact dose.
Should I give my pet a selenium supplement?
No — selenium is a mineral to never supplement at home. The gap between required and harmful is the narrowest in mineral nutrition; selenium in a shopping-cart supplement is a risk no healthy pet needs.
How does Bowlmark score sodium selenite?
Neutral — the engine can't read micrograms and doesn't pretend to. The selenium yeast page covers the organic-form alternative.
Foods that list sodium selenite
Ranked by score where scores exist. Placement here is never sold.
- Kettle Creek Farmhouse Chicken & Sweet Potato94
- Whisker & Pine Free-Run Chicken & Sweet Potato Recipe94
- Copperfield Cats Kitten Heritage Chicken & Oat Recipe93
- Meadow Farms Chicken & Oatmeal Puppy93
- Open Farm Wild-Caught Salmon Dry Cat Food93
- Whisker & Pine Wild-Caught Salmon & Lentil Recipe93
- Copper Hollow Lamb & Brown Rice Sensitive Skin & Stomach92
- Copperfield Cats Indoor Hairball Care Chicken & Brown Rice92
Sources
Related ingredients
Further reading
Cite this page
Bowlmark. "Sodium selenite in pet food — what it is and how it scores." https://www.bowlmark.com/ingredient/sodium-selenite
- Engine
- Methodology engine v1.1.0 · config 13c99e2f
- Verified
- Last verified August 22, 2026
No stored score to stamp yet — the engine and config above are the ones a scan runs today.