Hydrolysed Vegetable Soy Powder

About

What it is and where it shows up.

Hydrolysed vegetable soy powder is produced by acid or enzymatic hydrolysis of soy protein, breaking large proteins into smaller peptides and free amino acids; it is widely used as a savoury flavour enhancer (umami) in soups, sauces, seasonings, and convenience foods. The process improves protein digestibility and texture without significantly altering the overall amino acid profile.

Safety summary

The regulatory and scientific consensus.

Hydrolysed soy protein has a long history of safe use and is not classified as a novel food in the EU or considered harmful at typical dietary intake levels for the general adult population. A key safety concern is that acid hydrolysis can generate small amounts of 3-MCPD (3-monochloropropane-1,2-diol), a process contaminant regulated under EU Regulation (EC) No 1881/2006 with a TDI of 2 µg/kg body weight. Individuals with soy allergy must strictly avoid this ingredient, as the allergenic potential of the source is assumed to be retained despite hydrolysis.

Regulatory landscape

What food-safety regulators have decided.

Jurisdiction	Status	Note
EFSA (European Food Safety Authority) (European Union)	Restricted	3-MCPD process contaminant arising from acid hydrolysis is subject to a TDI of 0.002 mg/kg bw/day (2 µg/kg bw). Labelling as an allergen derived from soy is required per Regulation (EU) No 1169/2011 Annex II.source
FSSAI (Food Safety and Standards Authority of India) (India)	Approved	Hydrolysed vegetable protein is permitted as a flavouring substance under FSSAI Food Safety and Standards (Food Products Standards and Food Additives) Regulations, 2011. Soy is a notifiable allergen under FSSAI labelling regulations.source
FDA (Food and Drug Administration) (United States)	Approved	Hydrolysed vegetable protein (including soy) is listed as an approved food substance under 21 CFR. Soy is a major allergen under 21 CFR 101.4 and must be declared on labelling. FDA requires 'hydrolysed soy protein' to be explicitly named on labels, not hidden under generic 'natural flavours'.source

Who should approach with care

Whose guidance would steer them away.

Other — Individuals with soy allergy must strictly avoid this ingredient, as EFSA and FDA both note that the allergenicity potential of the soy source is assumed to be retained even after hydrolysis, and soy is a regulated major allergen requiring mandatory label declaration.

Infants — Soy protein hydrolysates in infant formula require case-by-case safety and suitability assessment by EFSA before authorisation under Regulation (EU) 2016/127; use in infant foods should follow clinician guidance.

Kidney Disease — Hydrolysed soy protein products may have elevated sodium content (especially in savoury formulations) and contribute to dietary amino acid load, warranting caution in patients with impaired renal function who require protein and sodium restriction.

Hypertension — Hydrolysed vegetable protein products in processed foods are often associated with high sodium content, which may contribute to elevated blood pressure in hypertensive individuals.

Thyroid Disease — Soy-derived proteins contain isoflavones that may interfere with thyroid hormone absorption and thyroid medication (levothyroxine); individuals with thyroid conditions should consult a doctor regarding regular soy consumption.

Research citations

The sources behind this verdict.

1other. FSAI Article 4 Conclusion: Novel Food Consultation Status — Pea Protein Hydrolysate and Soy Protein Hydrolysate. food.ec.europa.eu
2FDA. FDA Food Substances — protein, vegetable, hydrolyzed (EAFUS/HFP listing). hfpappexternal.fda.gov
3EFSA. Novel foods, food enzymes, and food additives derived from food by-products: principles and overview of EFSA safety assessment (PMC11165998). pmc.ncbi.nlm.nih.gov
4PubMed. Safety of partially hydrolysed protein from spent barley (Hordeum vulgare) and rice (Oryza sativa) as a novel food pursuant to Regulation (EU) 2015/2283, 2023. pubmed.ncbi.nlm.nih.gov
5EFSA. Opinion of the Scientific Panel on Dietetic Products, Nutrition and Allergies related to a notification from AIIBP and FAIBP on acid hydrolysed vegetable protein from soy pursuant to Article 6 paragraph 11 of Directive 2000/13/EC, 2005. efsa.europa.eu

Independently researched5 citations