Soy Peptones (Soy Peptone, Soytone)

A plant nitrogen source made by enzymatic hydrolysis of soy protein, rich in both peptides and carbohydrates. A standard ingredient of the Tryptic Soy family and the first choice for animal-free formulations.

Soy peptone (often sold as soytone) is made by enzymatic hydrolysis of soy protein. It has a broad peptide profile and keeps the carbohydrates, minerals and vitamins of the bean, so its nutrition is more complete than a plain protein hydrolysate. It is a standard ingredient of Tryptic Soy Broth and Tryptic Soy Agar, and together with tryptone supports most bacteria and fungi.

Being animal-free, soy peptone is widely used to replace meat peptones in Halal, vegetarian and animal-origin-free formulations, and is common in probiotic, Bacillus and mould fermentation as well as cell culture supplements. Note that soy is a regulated allergen and must be declared on labels.

This page lists the soy peptones supplied by STBIO MEDIA, including non-GMO, clear-solution and Halal-certified versions. Some products are soy and yeast blends, which the tags indicate.

How to choose

Animal-free or Halal formulations: soy peptone is the most established replacement for meat peptones.
If the final product must be non-GMO: choose products tagged Non-GMO and ask sales for the raw-material statement.
Liquid formulations or cell culture: choose a clear-solution grade to avoid turbidity and precipitate.
Bacillus, mould or enzyme-production fermentation: the carbohydrate content of soy peptone helps these strains.

Filter by organism and requirements in the selector

Products in this group

Soy peptones

Enzymatically hydrolysed soy protein, the plant nitrogen source in TSB and similar formulations

Soy protein powders and isolates

Soy protein that is not extensively hydrolysed, used as a fermentation nitrogen source or to replace soy milk

Cell-culture grade

Ultrafiltered and low in endotoxin for serum-free cell culture

Other

REF. 21501Malt Peptone MA2500 g5 kg25 kg

Frequently asked questions

01Are soytone and soy peptone the same thing?

Soytone is a trade name for soy peptone; both refer to enzymatic hydrolysates of soy protein. Brands differ in degree of hydrolysis, salt and carbohydrate content, so run a small trial when switching sources.

02Can soy peptone fully replace meat peptone?

For most general-purpose media, yes; the Tryptic Soy family was designed that way. For fastidious strains or formulations that rely on specific growth factors, you may need yeast extract alongside it. Compare growth curves with a sample first.