Insect Protein Broken Down Into Peptides Shows Antioxidant and Blood Pressure-Lowering Activity
Enzymatic hydrolysis of edible insect protein produces bioactive peptides with antioxidant and ACE-inhibitory (blood pressure-lowering) properties, suggesting potential as functional food ingredients.
Quick Facts
What This Study Found
Insect protein hydrolysates showed strong antioxidant activity (up to 944.8 μmol Trolox equivalent/g by ORAC) and ACE inhibition (IC50 as low as 55.5 μg protein/mL), but no antimicrobial or antidiabetic activity.
Key Numbers
ABTS: ~95 µmol TE/g; ORAC: 826-945 µmol TE/g; ACE IC50: 55.5 µg/mL (Alcalase), 107.4 µg/mL (Corolase); no antimicrobial/antidiabetic activity
How They Did This
Enzymatic hydrolysis of Alphitobius diaperinus protein using Alcalase 2.5L and Corolase PP at optimized conditions, followed by ABTS and ORAC antioxidant assays, ACE inhibition testing, and antimicrobial and antidiabetic screening.
Why This Research Matters
As the world searches for sustainable protein sources, demonstrating that insect proteins can yield health-promoting bioactive peptides adds nutritional value beyond basic protein content, making insect-based foods more attractive to consumers and the food industry.
The Bigger Picture
Insect farming produces protein with a fraction of the environmental impact of livestock. If insect-derived peptides can double as functional health ingredients, it strengthens the economic and nutritional case for incorporating insects into the global food system.
What This Study Doesn't Tell Us
All bioactivity was measured in test tubes, not in animals or humans. ACE inhibition in vitro does not guarantee blood pressure reduction in vivo. Individual bioactive peptide sequences were not identified. Consumer acceptance of insect-derived ingredients remains a barrier.
Questions This Raises
- ?Which specific peptide sequences in the hydrolysates are responsible for the ACE-inhibitory and antioxidant effects?
- ?Do these bioactive effects persist after gastrointestinal digestion and absorption?
- ?Can insect protein hydrolysates lower blood pressure in animal models or human clinical trials?
Trust & Context
- Key Stat:
- IC50: 55.5 μg/mL ACE inhibition potency of the best insect hydrolysate — comparable to peptides from traditional food protein sources like milk and fish
- Evidence Grade:
- Rated preliminary because bioactivity is demonstrated only in test tube assays. No animal or human studies confirm that these peptides have health effects when consumed as food.
- Study Age:
- Published in 2020, this study reflects growing research interest in insect-derived bioactive peptides as sustainable functional food ingredients.
- Original Title:
- Enzymatic hydrolysis of insect Alphitobius diaperinus towards the development of bioactive peptide hydrolysates.
- Published In:
- Food & function, 11(4), 3539-3548 (2020)
- Authors:
- Sousa, Pedro, Borges, Sandra, Pintado, Manuela
- Database ID:
- RPEP-05146
Evidence Hierarchy
Frequently Asked Questions
What insect was used and is it safe to eat?
The lesser mealworm beetle (Alphitobius diaperinus) is an edible insect already approved for food use in several countries. It is high in protein and can be farmed with minimal environmental impact compared to traditional livestock.
Could these insect peptides actually lower blood pressure?
The peptides inhibit ACE in lab tests — the same mechanism used by blood pressure medications. However, whether they survive digestion and reach the bloodstream in active form needs to be confirmed through animal and human studies before health claims can be made.
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Cite This Study
https://rethinkpeptides.com/research/RPEP-05146APA
Sousa, Pedro; Borges, Sandra; Pintado, Manuela. (2020). Enzymatic hydrolysis of insect Alphitobius diaperinus towards the development of bioactive peptide hydrolysates.. Food & function, 11(4), 3539-3548. https://doi.org/10.1039/d0fo00188k
MLA
Sousa, Pedro, et al. "Enzymatic hydrolysis of insect Alphitobius diaperinus towards the development of bioactive peptide hydrolysates.." Food & function, 2020. https://doi.org/10.1039/d0fo00188k
RethinkPeptides
RethinkPeptides Research Database. "Enzymatic hydrolysis of insect Alphitobius diaperinus toward..." RPEP-05146. Retrieved from https://rethinkpeptides.com/research/sousa-2020-enzymatic-hydrolysis-of-insect
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.