Bsfl
BSFL Nutrition Facts: The Highest Calcium Feeder Insect
BSFL Nutrition: The Calcium King of Feeder Insects
Black soldier fly larvae (BSFL) dominate the calcium category so completely that no other common feeder insect is even close. At approximately 9,340 mg/kg of calcium with a calcium-to-phosphorus ratio of 6.92:1, they are the only feeder insect that provides a genuine calcium surplus without supplemental dusting.
BSFL Nutritional Profile
| Nutrient | Value |
|---|---|
| Protein | ~17% |
| Fat | ~14% |
| Moisture | ~61% |
| Calcium | ~9,340 mg/kg |
| Phosphorus | ~1,350 mg/kg |
| Ca:P Ratio | 6.92:1 |
Calcium Comparison: BSFL vs Every Other Feeder
| Feeder | Calcium (mg/kg) | Ca:P Ratio | Dusting Required? |
|---|---|---|---|
| BSFL | 9,340 | 6.92:1 | No |
| Hornworms | 460 | 3.07:1 | Optional |
| Silkworms | 340 | 0.77:1 | Yes |
| Discoid Roaches | 200 | 0.77:1 | Yes |
| Crickets | 140 | 0.13:1 | Yes |
| Superworms | 100 | 0.16:1 | Yes |
| Mealworms | 30 | 0.04:1 | Yes (heavily) |
BSFL contain 20 times more calcium than discoid roaches, 67 times more than crickets, and 311 times more than mealworms. The difference is not marginal — it is orders of magnitude.
What the Numbers Mean for Your Reptile
Calcium-to-Phosphorus Ratio
The Ca:P ratio is arguably more important than raw calcium content. Phosphorus binds calcium in the digestive tract, preventing absorption. Most feeders have inverted ratios — more phosphorus than calcium — which means they actively deplete your reptile's calcium stores with every feeding. BSFL at 6.92:1 are the dramatic exception: they deliver a massive calcium surplus that actively builds and maintains bone density.
No Dusting Required
Because BSFL already have a positive Ca:P ratio, they do not need calcium dusting before feeding. This is unique among common feeders. Every other feeder insect — including discoid roaches, silkworms, crickets, and mealworms — requires calcium dusting to compensate for their phosphorus-heavy profiles.
Protein and Fat Considerations
At 17% protein and 14% fat, BSFL are moderate in both categories. The protein is lower than discoid roaches (20%) and the fat is higher than silkworms (1%) or hornworms (3%). This means BSFL work best as a calcium supplement feeder used 1-3 times per week rather than a daily staple. For daily protein, discoid roaches remain the ideal choice.
Where BSFL Fit in the Feeding Rotation
- Daily protein: Discoid roaches (20% protein, 7% fat)
- 2-3x/week low-fat: Silkworms (1% fat, serrapeptase)
- 1-2x/week calcium: BSFL (9,340 mg/kg calcium — no dusting)
- 1-2x/week hydration: Hornworms (85% moisture, 3:1 Ca:P)
Each feeder fills a specific nutritional niche. Together they create the most complete insect feeding program available for captive reptiles.
Browse our BSFL collection and give your reptile the calcium it needs — naturally.
— Matt, Founder, All Angles Creatures
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