Black Soldier Fly Larvae vs Dried Mealworms for Chickens: Full Comparison

1. What Are Black Soldier Fly Larvae and Dried Mealworms?

Definition Box

• Black soldier fly (BSF) larvae are the larval stage of Hermetia illucens, a fly species farmed on organic side streams (food waste, agricultural by-products, distillers' grains) and harvested before pupation, then dried or defatted for use as black soldier fly larvae feed ingredients.

• Dried mealworms are the dehydrated larvae of the yellow mealworm beetle, Tenebrio molitor, typically reared on grain by-products such as wheat bran and sold as dried mealworms, ground meal, or oil-extracted powder.

Both are classified as farmed insect protein sources under feed regulations in the EU and US, and both are used across poultry, aquaculture, and pet food supply chains. The core difference for chicken feed buyers comes down to mineral composition, fat chemistry, and how far along each ingredient is in the regulatory approval process for target species.

From a manufacturing perspective, producers that process both insect categories — such as Qingdao Sino Crown, which manufactures dried mealworm, mealworm powder, and BSF larvae product lines — are positioned to supply either ingredient or blended formats depending on a buyer's nutrient targets and regulatory market.

2. Nutritional Comparison: Protein, Fat, and Amino Acids

Published composition studies show meaningful overlap between the two insects, but also real differences driven by species biology and substrate.

Whole dried BSF larvae crude protein has been reported as low as roughly 32% and as high as 48% depending on rearing substrate, while partially defatted BSF meal can reach the high 50s to low 60s in percentage terms, putting it on par with fishmeal. Dried mealworms are more consistently reported in the high 40s to low 50s for crude protein regardless of substrate, which is one reason they are popular as a straightforward protein-dense ingredient.

Callout: Crude protein percentage alone does not determine feed value. Amino acid digestibility, fat quality, and mineral balance matter just as much for layer and broiler performance.

3. Mineral Profile: Calcium, Phosphorus, and Bone Health in Chickens

This is the sharpest nutritional difference between the two insects, and it has direct consequences for eggshell quality and skeletal health.

• BSF larvae accumulate calcium in their exoskeleton and have been measured at roughly 1%–6% calcium on a dry matter basis, with several studies and commercial analyses reporting values around 5%. This is unusually high for an insect-based ingredient and is one reason BSF larvae meal is often described as having a more "complete" mineral profile for poultry.

• Dried mealworms are, by contrast, a poor calcium source. Composition surveys place mealworm calcium content in roughly the 0.3%–0.7% range, while phosphorus is comparatively high, producing an unfavorable calcium-to-phosphorus ratio that published poultry and companion-animal feeding guides describe as needing correction from an outside calcium source.

Note for formulators: Calcium content in both insects is substrate-dependent, so a Certificate of Analysis (COA) for the specific batch matters more than published averages when finalizing a feed formulation.

4. Functional Compounds: Lauric Acid, Chitin, and Antimicrobial Potential

BSF larvae fat is notable for its lauric acid content, which has been reported at roughly 40%–50% of total fatty acids in some analyses. Lauric acid is a medium-chain fatty acid studied in animal nutrition for potential antimicrobial and gut-health effects, and it is a key reason BSF oil is marketed separately from the defatted meal for buyers who want to dose the fat fraction independently.

Mealworm fat, by comparison, is predominantly unsaturated, with oleic and linoleic acid as leading components — closer in profile to typical vegetable oils. Mealworm oil is generally positioned around its unsaturated fatty acid content and energy density rather than antimicrobial claims.

Both insects contain chitin in their exoskeletons, a structural polysaccharide that has been studied for potential prebiotic and immune-modulating effects in poultry, though research results across species and inclusion levels remain mixed. Buyers should treat chitin-related health claims as an active research area rather than an established, guaranteed benefit.

5. Digestibility and Palatability in Poultry Diets

Standardized ileal digestibility studies in broiler chickens have found that the relatively high fat content of BSF larvae is associated with greater amino acid digestibility compared with soybean meal and rapeseed meal, supporting its use as a protein and energy source in monogastric diets. Mealworm-based ingredients have separately demonstrated high protein digestibility in feeding trials, with some evaluations reporting digestibility above 80% for defatted mealworm protein sources.

Palatability differences are less rigorously documented in peer-reviewed literature but are widely reported anecdotally and in extension guidance: both live and dried forms of each insect are readily accepted by chickens, and dried mealworms in particular are a long-established treat item in backyard flock management due to their texture and ease of hand-feeding.

6. Regulatory Status: EU and US Feed Approvals

Regulatory maturity is a genuine differentiator for B2B buyers, since it affects which markets a finished feed product can legally enter.

European Union. Commission Regulation (EU) 2021/1372 authorized the use of processed animal protein derived from farmed insects (insect PAP) in poultry and pig feed, based on a 2015 EFSA risk-profile opinion concluding that microbiological hazards in insect protein are comparable to other non-processed animal-origin proteins. The authorized species list, originally set at seven under Regulation (EU) 2017/893, includes both black soldier fly (Hermetia illucens) and yellow mealworm (Tenebrio molitor), alongside house fly, lesser mealworm, and several cricket species. It's worth noting this feed-law authorization is separate from the EU's Novel Food framework (Regulation (EU) 2015/2283), which governs insect ingredients for human food and has separately approved dried and UV-treated yellow mealworm powder for food use.

United States. AAFCO's ingredient definition process has moved further for BSF larvae than for mealworms, though both are now covered:

• Dried Black Soldier Fly Larvae (AAFCO T60.117) is an Official ingredient definition covering finfish, poultry, and swine feed, plus adult dog and cat food. FDA recommended amending this definition to include poultry use in 2018, and the definition has continued to be refined through subsequent AAFCO Ingredient Definitions Committee meetings.

• Dried Mealworm Meal (AAFCO T60.121) was moved to Official status more recently, in 2024, also covering finfish, poultry, and swine feed alongside adult dog food.

Practical takeaway: Both insects now have a legitimate regulatory pathway into US poultry feed, but BSF larvae has a longer track record with regulators, which some buyers weigh as a lower-friction option for new product development.

7. Supply Chain Risk and Sourcing: Lessons from Market Consolidation

The insect protein sector has consolidated significantly since 2023. French mealworm producer Ÿnsect, once one of the best-funded companies in the industry, entered judicial liquidation on December 1, 2025, after having raised more than $600 million and having sought court protection in 2024 following an insolvency declaration. The company's flagship large-scale facility is being closed, illustrating how capital-intensive, single-species, single-facility production models carry real financial fragility even with strong initial funding and market visibility.

For procurement teams, this case supports a few sourcing principles regardless of which insect protein is chosen:

• Favor suppliers with multiple production lines or facilities rather than a single mega-plant dependent on one financing round.

• Ask about a supplier's ability to substitute or blend across insect categories (BSF and mealworm) if one product line faces a supply interruption.

• Weigh geographic diversification alongside price, since concentrated production in one region or one company can create single points of failure.

8. Cost Considerations for Commercial and Backyard Use

Insect protein pricing is influenced by several variables rather than a single benchmark figure: global fishmeal and soybean meal prices (since insect meal is often positioned as a substitute), processing format (whole dried vs. defatted vs. oil-extracted), moisture and ash content at time of sale, order volume, and freight from the country of origin. Because these inputs shift with commodity markets and currency exchange rates, buyers should request current, batch-specific quotations rather than relying on published price ranges, which age quickly in this sector.

As a general formulation principle, comparing cost per unit of digestible protein delivered — not simply price per kilogram of raw material — gives a more accurate picture of true value between BSF larvae and dried mealworm options.

9. Application Guide: Backyard Flocks vs. Commercial Feed Formulation

Backyard and small-flock use. Dried mealworms are widely available in small retail packaging and are commonly used as a treat or supplemental protein, often recommended at modest inclusion levels (frequently cited around 5%–10% of total diet in feeding guidance) alongside a standard layer ration. Because of the calcium gap discussed in Section 3, backyard keepers feeding meaningful quantities of dried mealworms should ensure hens have separate access to oyster shell or another calcium source, particularly during lay.

Commercial layer and broiler formulation. BSF larvae meal, BSF powder, or defatted BSF protein meal are increasingly evaluated as partial replacements for fishmeal or soybean meal in compound feed, partly because of the more favorable native calcium profile and partly because of the longer regulatory track record described above. Defatted mealworm protein powder is also used where a formulator wants a concentrated protein fraction with the fat managed separately. Inclusion rates in published research trials for both insects range from modest supplementation up to significant replacement of conventional protein sources, though commercial formulations typically start conservatively pending in-house trial data and cost modeling.

10. Buyer Checklist: Choosing Between BSF Larvae and Dried Mealworms

• Request a current Certificate of Analysis showing crude protein, crude fat, calcium, phosphorus, and moisture on an as-fed basis.

• Confirm which regulatory category applies (AAFCO ingredient definition or EU insect PAP authorization) and that it explicitly covers poultry, not only aquaculture or pet food.

• Ask about substrate and feedstock traceability, since calcium and fat content shift meaningfully with what the insects were reared on.

• Verify the processing format — whole dried, defatted meal, ground mealworm powder, or insect protein powder — matches your formulation and equipment needs.

• Evaluate supplier financial stability and production footprint in light of recent sector consolidation.

• Compare cost per unit of digestible protein rather than price per kilogram alone.

• Consider a supplier that offers both BSF and mealworm lines, such as whole dried mealworms alongside BSF options, for formulation flexibility if one category's supply or pricing shifts.

FAQ

Which has more protein, black soldier fly larvae or dried mealworms?Dried mealworms typically test slightly higher in crude protein on a whole, dried basis (roughly 46%–53%) compared with whole dried BSF larvae (roughly 30%–45%). Both can reach the high 50s to low 60s in percentage protein once defatted.

Do chickens need extra calcium when fed dried mealworms?Yes, generally. Dried mealworms are low in calcium and comparatively high in phosphorus, so diets relying heavily on mealworms benefit from a supplemental calcium source such as oyster shell, especially for laying hens.

Is black soldier fly larvae or mealworm meal legal to use in commercial poultry feed?Both are permitted under current EU and US frameworks. The EU authorizes both species as processed animal protein for poultry under Regulation (EU) 2021/1372, and AAFCO maintains official ingredient definitions for Dried Black Soldier Fly Larvae and Dried Mealworm Meal covering poultry use in the US.

Can chickens eat both BSF larvae and dried mealworms together?Yes. There is no established conflict between feeding both insect types, and combining them can help balance the calcium shortfall of mealworms with the higher native calcium of BSF larvae.

What is lauric acid and why does it matter in BSF larvae?Lauric acid is a medium-chain saturated fatty acid that makes up a large share of BSF larvae fat, often reported around 40%–50% of total fatty acids. It has been studied for potential antimicrobial and gut-health effects in animal nutrition, though it should be treated as an area of ongoing research rather than a fully settled claim.

How much dried mealworm or BSF larvae should be fed to laying hens?Published feeding guidance and trials vary, with backyard recommendations often citing modest inclusion (around 5%–10% of the diet) as a treat or supplement rather than a full ration replacement. Commercial inclusion rates depend on the specific formulation, cost targets, and in-house trial results, and should be set with a poultry nutritionist rather than a fixed rule of thumb.

References

• Commission Regulation (EU) 2021/1372, Official Journal of the European Union: https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32021R1372

• International Platform of Insects for Food and Feed (IPIFF), FAQs on the authorisation of insect processed animal proteins: https://ipiff.org/wp-content/uploads/2021/04/Apr-13-2021-Frequently-asked-questions-insect-PAPs.pdf

• European Food Safety Authority, Safety of dried yellow mealworm (Tenebrio molitor larva) as a novel food, EFSA Journal (2021): https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2021.6343

• AAFCO Ingredient Definitions Committee, Annual Meeting Report (2024), covering Dried Black Soldier Fly Larvae and Dried Mealworm Meal definitions: https://www.aafco.org/wp-content/uploads/2024/11/5.-IDC-Annual.pdf

• AAFCO Ingredient Definitions Committee, October 2023 Meeting Minutes: https://www.aafco.org/wp-content/uploads/2024/07/Minutes_October_2023_FINALkv2193914-2193915.pdf

• Effect of phase-specific dietary black soldier fly larvae supplementation on growth performance and blood biochemical indices in meat roosters, PMC: https://pmc.ncbi.nlm.nih.gov/articles/PMC12925142/

• Standardized Ileal Digestibility of Protein and Amino Acids in Black Soldier Fly Larvae and Duckweed in Broiler Chickens, PMC: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12897407/

• Nutritional composition of dried mealworm larvae, comparative research summary: https://www.researchgate.net/figure/Nutrient-profile-of-dried-mealworm-larvae-from-different-researchers_tbl2_335027183

• PetfoodIndustry, French insect protein producer Ÿnsect enters judicial liquidation: https://www.petfoodindustry.com/insect-based-cat-and-dog-food/news/15773350/french-insect-protein-producer-nsect-enters-judicial-liquidation

• Vertical Farm Daily, Ÿnsect enters judicial liquidation as financing efforts fall through: https://www.verticalfarmdaily.com/article/9792106/ynsect-enters-judicial-liquidation-as-financing-efforts-fall-through/

This article is intended for general technical and procurement guidance. Nutrient values vary by substrate, processing method, and supplier batch; always confirm specifications against a current Certificate of Analysis before formulating.