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Bioaccumulated provitamin A in black soldier fly larvae is bioavailable and capable of improving vitamin A status of gerbils

Morand-Laffargue L., Delbecq S., Creton B., Sabatier D., Papin M., Dhuique-Mayer C., Borel P.. 2023. Food Research International, 171 : 8 p..

DOI: 10.1016/j.foodres.2023.113064

The aim was to study whether provitamin A (proVA), which can bioaccumulate in black soldier fly larvae (BSFL), is bioavailable and can restore VA status in mammals. A model for studying the metabolism of this vitamin, the gerbil, was either fed a standard diet (C+ group), a diet without VA (C-), a diet in which VA was provided by ß-carotene (ß-C) from sweet potatoes (SP), or a diet in which VA was provided by ß-C from BSFL that had been fed sweet potatoes (BSFL). The animals were killed at the end of the supplementation period and ß-C, retinol and retinyl esters were measured in plasma and liver. As expected ß-C was not detected in plasma and liver of the C+ and C- groups. ß-C concentrations were lower (p < 0.05) in plasma and liver of the BSFL group as compared to the SP group. Liver retinol and retinyl ester concentrations were lower in the C- group than in all the other groups (p < 0.05). These concentrations were not significantly different in the C+ and SP groups while they were lower in the BSFL group (p < 0.05 for retinyl oleate and retinyl linoleate). In total, the liver stock of retinol equivalent was almost twice lower in the BSFL group than in the SP group. Thus, ß-C present in the BSFL matrix is bioavailable and capable of improving VA status, but this matrix decreases its effectiveness by a factor of around two compared to the sweet potato matrix.

Mots-clés : gerbille; hermetia illucens; bioaccumulation; régime alimentaire; biodisponibilité; patate douce

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