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TECHNICAL NOTE
Organic selenium yeast: what the yeast actually does
Selenium yeast is not selenium added to yeast. The yeast grows in the presence of selenium and incorporates it into its own amino acids, which is why the specification is written around a form and a ratio rather than only a concentration.
Declared values are taken from the 2026 PANGOO technical data sheets and product catalogs.
Biotransformation, not blending
The food catalog names the route for this product group in a single phrase: organic selenium produced through yeast biotransformation. That is the whole distinction. Selenium is taken up by the growing yeast and becomes part of the cell rather than sitting alongside it as an added mineral.
The feed data sheet states the outcome in the product description: SeleniPro™ is selenium-enriched yeast in which organic selenium is supplied predominantly as selenomethionine (SeMet) within a Saccharomyces cerevisiae yeast matrix.
Why the form matters more than the number
Selenomethionine is an amino-acid form, which is why it is described as organic selenium and why the specification does not stop at a concentration. Two declarations carry the product:
Declared value
SeleniPro™ (feed)
Product type
Organic selenium yeast / feed additive
Form of selenium
Predominantly selenomethionine (SeMet)
Organic selenium (as SeMet)
≥ 2,000 mg/kg (declared)
Yeast matrix
≥ 98.0%
Status
Inactivated / non-viable
Source
Saccharomyces cerevisiae yeast matrix
Declared values from the 2026 PANGOO data sheets and catalogs.
The same route on the food side
SelenoVital™ is positioned the same way — organic selenium through yeast biotransformation — but is held to a food-grade specification and offered across a concentration ladder. Its declared ratio is the figure that distinguishes it:
Declared value
SelenoVital™ (food)
Form
Organic selenium yeast powder
Organic selenium ratio
≥ 97%
Selenium content
Se 500–2500 mg/kg (graded)
Protein
≥ 40%
Moisture
≤ 6.0%
Packaging
25 kg bag/drum
Shelf life
24 months
Declared values from the 2026 PANGOO data sheets and catalogs.
The grades, and when to pick one
The food range sells selenium concentration as a series of grades, and the catalog describes what each is for — a useful guide to how fortification level is normally chosen:
Grade
Catalog positioning
500 mg/kg
Entry-level fortification
1000 mg/kg
Standard fortification
1500 mg/kg
Medium-high concentration
2000 mg/kg
High-concentration use
2500 mg/kg
Customised high-concentration formulation
Declared values from the 2026 PANGOO data sheets and catalogs.
The catalog notes that final use level, regulatory status and label claims should follow the destination market and the mutually confirmed technical documentation. That is not boilerplate for this product family: selenium is one of the nutrients where permitted addition levels differ most between markets.
Typical inclusion in feed
The feed data sheet gives a narrow band across species, and ruminants a slightly lower one:
Application
Typical inclusion
Poultry
0.1–0.3 kg/MT
Swine
0.1–0.3 kg/MT
Ruminants
0.1–0.2 kg/MT
Aquaculture
0.1–0.3 kg/MT
Companion animals
0.1–0.3 kg/MT
Declared values from the 2026 PANGOO data sheets and catalogs.
What to specify
Selenium products are easy to buy on concentration alone and then find the form does not match. Four things settle it:
• The form: selenomethionine content, or the organic ratio, not just mg/kg of selenium
• The content grade, which sets the inclusion rate arithmetic
• The destination market, because permitted selenium levels and permitted claims differ by market
• Whether the product is for feed or for food, since the two are held to different specifications
Products in this note
Every figure quoted above is published on the product page and in its data sheet.
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Questions on this note?
The approved specification, signed contract, product label and batch-specific COA prevail over the values summarised here. Specifications can be adapted to the destination market and the final commercial agreement.
