Butterworm Nutrition Content

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Butterworm Nutrition Content

Postby StephE24 » Thu Aug 06, 2020 1:38 pm

Hi all. So, I got some butterworms for my guy & he loves them so far! However, I kept finding conflicting info. online about the nutrition content so...thought I would share something here for others who may have the same issue.

TL;DR: High fat (29.4%), low Ca:P ratio = 1:18 - What I took away from this study is they would be better off as treats than as a staple feeder.

According to the article Complete Nutrient Content of Four Species of Feeder Insects by Mark D. Finke (June, 2012) in Zoo Biology, butterworm nutrition facts are as follows:

Moisture (g/kg): 602
Crude protein (g/kg): 155
Crude fat (g/kg): 294
Ash (g/kg): 8
Metabolizable energy (kcal/kg): 2,977
Metabolizable energy (cal/insect): 1,166
Calcium (mg/kg): 125
Phosphorous (mg/kg): 2,250
Ca:P: 1:18
Vitamin A (μg retinol/kg): <300
Vitamin D3 (IU/kg): 159
Beta carotene (mg/kg): 0.566
Low in chitin = Estimated chitin (g/kg): 11.1 - for reference phoenix worms/BSFL are nearly double that at 21.0 g/kg

"None of the insects contained detectable levels of vitamin A/retinol or vitamin D2, while all species but house flies contained low levels (20–48% of the requirement) of vitamin D3."

Of note: The butterworms used in this study were purchased from Mulberry Farms (where I happened to purchase mine from. However, it is from 2012 - distributor may have changed which I believe could potentially change some of the values based on the worms diet and such).

Hope this helps someone else who is struggling to find accurate info. Also, here is a link to the article if you'd like to check it out for yourself: https://doi-org.ezproxy.umsl.edu/10.1002/zoo.21012
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Re: Butterworm Nutrition Content

Postby CooperDragon » Mon Aug 10, 2020 1:33 pm

It's always good to have more info about feeder nutrition. Thanks for sharing!
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