Work

Protein Extraction from Mealworm (Tenebrio molitor): Effects of Euthanasia and Drying on Yield and Composition

Year: 2026

Type: article

Abstract: < 0.001), except between blanched + freeze-dried and blast-frozen + oven-dried samples. Blast freezing resulted in higher protein extraction yields than blanching. Blast freezing markedly increased acid values (>40 mg KOH/g oil) relative to blanching (<5 mg KOH/g), while freeze drying increased peroxide values more than tenfold compared with oven drying. Ash contents ranged from 4 to 8% without a treatment effect. Defatting significantly reduced oil content and increased protein and chitin contents. Chitin was nearly absent in protein concentrates. In blast-frozen + oven-dried protein concentrates, the oil content was significantly up-concentrated compared with defatted samples. P, Mg, and K significantly increased in defatted samples, while protein extraction reduced Mg, K, and Ca but increased Na due to alkaline solubilization. Micromineral profiles were most affected in protein concentrates, with increases in Cu and Fe and minor decreases in Mn. Overall, euthanasia and drying methods influence yield and quality, highlighting the need for tailored, scalable processing strategies for mealworm-based food and feed applications.

Source: Foods

DOI: 10.3390/foods15030585

Authors: Geert R. Verheyen, Sarah Goossens, Sabine Van Miert

Institution: Thomas More Kempen

Language: English

Topic: Insect Utilization and Effects

Subfield: Insect Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $3,499