Cricket Nutrition Requirements: What Crickets Need in Their Diet
Cricket nutrition is almost entirely covered from the hobbyist angle, what to feed your pet crickets or your feeder insect supply. From a production perspective, crickets are largely underdocumented. The question of what nutritional profile maximizes commercial FCR has received little practical attention.
The core number to know first: cricket feed with less than 18% protein content consistently produces FCR above 2.5. Everything else in cricket nutrition flows downstream from that baseline, but there's more to understand beyond the protein percentage.
TL;DR
- Riboflavin (B2): Required for energy metabolism.
- At 22-25%, Acheta domesticus achieves FCR in the 1.7-2.1 commercial range.
- Below 18%, the FCR penalty is notable and consistent.
- This isn't a simple 1:1 relationship (metabolism intervenes), but farms consistently see that higher dietary protein correlates with higher cricket body protein content, which produces higher-protein flour.
- Cricket body fat naturally contains omega-3 fatty acids (primarily ALA), a nutritional attribute that's actively marketed in cricket protein products.
- Dietary fat source can influence the omega-3 content of cricket body fat, though the effect is smaller than in fish or livestock.
- Some cricket flour producers have explored adding linseed or flaxseed (high ALA) to grow-out diets to increase omega-3 content in the finished flour.
Vitamin B12: Required for protein metabolism and cellular function.
- Crickets require dietary B12 because they cannot synthesize it endogenously.
- Commercial feeds and animal-derived protein sources (fish meal) provide B12; strict plant-based DIY formulas may be deficient.
Riboflavin (B2): Required for energy metabolism.
The Production Nutrition Framework
When we talk about cricket nutrition for commercial production, we're optimizing for two outcomes simultaneously:
- FCR: Feed efficiency, how much feed it takes to produce a pound of cricket
- End product quality: For feeder crickets, the nutritional profile the reptile receives; for flour production, the protein, fat, and micronutrient content of the finished flour
These two goals are usually aligned but occasionally diverge. A high-carbohydrate finisher diet might improve feed palatability and body weight gain while increasing fat content in the finished flour, which is good for FCR but bad for protein-focused flour buyers.
Understanding the nutritional requirements allows you to optimize for your specific production goals.
Protein Requirements
The Target Range
Optimal: 22-25% crude protein in the diet
Minimum functional: 18% crude protein
Below minimum: FCR exceeds 2.5 consistently; growth rate below optimal
Protein is the single most important macronutrient for cricket growth rate and FCR. At 22-25%, Acheta domesticus achieves FCR in the 1.7-2.1 commercial range. Below 18%, the FCR penalty is notable and consistent.
Why Protein Matters So Much
Crickets use dietary protein for:
- Building muscle and structural tissue (growth)
- Chitin production for the exoskeleton (critical during molts)
- Enzyme production and immune function
- Reproductive activity (egg production in females)
The growth and molting functions are what drive FCR. An adequate protein supply means more dietary energy goes to growth. Insufficient protein means dietary energy goes to maintenance with less available for growth, worse FCR.
Protein and Flour Quality
For cricket flour production, dietary protein directly influences flour protein content. This isn't a simple 1:1 relationship (metabolism intervenes), but farms consistently see that higher dietary protein correlates with higher cricket body protein content, which produces higher-protein flour.
Food brand buyers who specify minimum protein percentages for cricket flour are, in effect, specifying your dietary protein targets upstream.
Carbohydrate Requirements
The Target Range
Optimal: 45-55% of diet as carbohydrates
Impact of excess (above 60%): Increased fat deposition, elevated flour fat content
Impact of deficiency (below 35%): Energy shortfall; increased protein catabolism; worse FCR
Carbohydrates provide the primary energy source for cricket metabolic activity. The right balance fuels growth without the excess that gets stored as fat.
Carbohydrate Types
Starch (from corn, wheat, oats): The primary energy substrate for crickets. Easily digestible and efficiently converted to metabolic energy.
Fiber: Present in most plant-based feeds. Not efficiently digested but not harmful at moderate levels. High fiber feed may reduce overall digestibility.
Simple sugars: Crickets consume sugary fruits and vegetables readily. Simple sugars are metabolized quickly, which is useful for high-energy pinhead stages but can contribute to excess fat deposition in adult production.
Carbohydrates and Flour Quality
For cricket flour operations, managing carbohydrate level in the production diet, particularly near harvest, directly affects flour fat content. High-carbohydrate finisher diets (used in some poultry production to improve flavor) increase fat deposition in the cricket's body. Cricket flour from high-carbohydrate-finished production has measurably higher fat content.
Fat Requirements
The Target Range
Optimal: 5-10% of diet as fat
Dietary fat and cricket fat: Dietary fat above 10% increases fat content in the cricket body, which increases fat in flour
Dietary fat provides fat-soluble vitamin transport (A, D, E, K) and essential fatty acids for membrane function. Most balanced cricket feeds achieve adequate fat from the grain and protein components without additional fat supplementation.
Omega-3 Fatty Acids
Cricket body fat naturally contains omega-3 fatty acids (primarily ALA), a nutritional attribute that's actively marketed in cricket protein products. Dietary fat source can influence the omega-3 content of cricket body fat, though the effect is smaller than in fish or livestock.
Some cricket flour producers have explored adding linseed or flaxseed (high ALA) to grow-out diets to increase omega-3 content in the finished flour. This is an advanced optimization, not a baseline requirement.
Vitamin Requirements
Crickets require most of the same vitamins that vertebrate animals need, though in different absolute quantities. The vitamins most likely to be deficient in DIY cricket feed without supplementation:
Vitamin A: Required for growth and molting. Deficiency causes incomplete molts and elevated mortality. Provided by beta-carotene sources in feed or vitamin premixes.
Vitamin D: Required for calcium metabolism and chitin formation. Crickets cannot synthesize vitamin D from UVB exposure the way reptiles do, they must obtain it from diet. Vitamin D deficiency leads to poor molting outcomes.
Vitamin B12: Required for protein metabolism and cellular function. Crickets require dietary B12 because they cannot synthesize it endogenously. Commercial feeds and animal-derived protein sources (fish meal) provide B12; strict plant-based DIY formulas may be deficient.
Riboflavin (B2): Required for energy metabolism. Deficiency produces poor growth rates and FCR degradation.
Pantothenic acid (B5): Required for fat and carbohydrate metabolism. Deficiency symptoms include lethargy and poor growth.
Using a poultry vitamin-mineral premix at 3-5% of the diet in DIY formulas addresses vitamin requirements effectively. Commercial cricket feeds include these vitamins in their formulations.
Mineral Requirements
Calcium: The most operationally important mineral for cricket production. Required for exoskeleton formation at each molt, muscle function, and egg production. Deficiency causes failed molts, increased mortality, and poor production. Add calcium carbonate (1-2% of DIY feed) or use commercial feeds with calcium supplementation.
Phosphorus: Required for energy metabolism (ATP) and cellular function. Most feed ingredients contain adequate phosphorus. The ca:phosphorus balance matters more than absolute levels.
Potassium: Required for nerve and muscle function. Present in most plant-based feeds in adequate quantities.
Trace minerals (zinc, manganese, selenium): Required in small quantities for enzyme function. A poultry vitamin-mineral premix provides adequate trace minerals for DIY feeds.
Does Feed Protein Content Affect Cricket Flour Nutritional Value?
Yes. The relationship isn't perfectly linear, but it's real and consistent:
- Higher dietary protein → higher body protein → higher cricket flour protein content
- Lower dietary protein → lower body protein → lower flour protein content
For flour operations targeting 60-70% protein content in the finished flour, maintaining 22-25% dietary protein through the production cycle is essential. Switching to a low-protein finisher diet in the final weeks before harvest (a practice sometimes used to reduce feed cost) will measurably reduce flour protein content.
FAQ
What percentage of protein do crickets need in their diet?
Acheta domesticus needs 22-25% crude protein in the diet for optimal FCR and growth rate. Below 18%, FCR consistently exceeds 2.5 and growth rate is impaired. This is the most important single dietary specification for commercial cricket production. Most commercial cricket feeds and a properly formulated DIY blend achieve this range.
Do crickets need vitamins in their feed?
Yes. Key vitamins for cricket production include vitamin A (for growth and molting), vitamin D (for calcium metabolism), B12 (for protein metabolism), riboflavin, and pantothenic acid. Commercial cricket feeds include these in their formulations. DIY feed formulas need a poultry vitamin-mineral premix at 3-5% of the diet to avoid vitamin deficiencies that cause poor molting outcomes and elevated mortality.
Does feed protein content affect cricket flour nutritional value?
Yes. Higher dietary protein produces crickets with higher body protein content, which produces higher-protein flour. For flour operations targeting 60-70% protein in the finished product, maintaining 22-25% dietary protein through the full production cycle is important. See the Acheta domesticus feed requirements guide for detailed macronutrient targeting and the cricket farm management guide for how to track feed composition alongside production records.
How do moisture levels in cricket feed affect colony health?
Feed that is too dry reduces palatability and may cause crickets to rely entirely on water gel sources for hydration. Feed with excess moisture molds rapidly in the warm, humid environment of a cricket bin, and moldy feed is a significant exposure route for pathogens. The practical approach is to serve fresh wet foods (fruits, vegetables) separately from dry feed, replace wet items within 24 hours, and store dry feed in a low-humidity area.
Should gut-loading feed differ from the standard production diet?
Yes. Gut-loading targets the 24-48 hours before harvest to maximize the nutritional value transferred to the end consumer of the cricket. Gut-loading diets typically emphasize specific nutrients the buyer requires -- omega-3 fatty acids, calcium, and certain vitamins are common targets. Standard production feed is optimized for growth rate and FCR, not for enriching the nutritional profile of the finished product.
What feed management practices have the biggest impact on FCR?
Two changes consistently improve FCR more than any other: matching feed protein content to the optimal range for the target species (22-25% for Acheta domesticus), and increasing feeding frequency for pinhead-stage crickets (3 times per day versus once). After these two variables, reducing feed waste by feeding to observed consumption rather than fixed quantities is the next highest-impact adjustment.
Sources
- Food and Agriculture Organization of the United Nations (FAO) -- Edible Insects: Future Prospects for Food and Feed Security
- North American Coalition for Insect Agriculture (NACIA)
- Journal of Insects as Food and Feed (Wageningen Academic Publishers)
- American Association of Feed Control Officials (AAFCO)
- University of Georgia Cooperative Extension
The Bottom Line
Cricket nutrition comes down to a few core requirements: 22-25% protein for optimal FCR, adequate carbohydrates for energy without excess fat deposition, and vitamins and minerals supplied through either commercial feed or a supplemented DIY formula.
Get the protein percentage right first, it's the highest-use variable in both FCR and flour quality. Everything else (carbohydrate balance, vitamin supplementation, mineral adequacy) matters but moves the needle less than the protein target does.
Get Started with CricketOps
Feed management is where your production economics are won or lost. CricketOps lets you log every feed batch, track consumption and FCR by bin, and identify exactly where your feed program is performing and where it is not. Start tracking your feed inputs in CricketOps and get the data you need to improve your cost per pound of cricket produced.