In vitro bioavailability study finds silkworm larva powder improves zinc absorption over mulberry leaves, indicating high efficiency.
This is the first report on the in vitro bioavailability of zinc (Zn) in silkworm ( Bombyx mori ) larva powder (SLP) developed for human consumption. We used the chick bioassay, which has been extensively employed to evaluate the relative Zn bioavailability of animal feeds and foodstuffs, using ZnSO 4 ⋅ H 2 O as the 100% reference standard. Multiple regression analysis of total tibia Zn against supplemental Zn intake yielded a slope-ratio relative bioavailability value of 175% for Zn in SLP, which was significantly higher ( ) than that of mulberry ( Morus alba ) leaf (91%). SLP is an excellent efficacious source of very highly bioavailable Zn.
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Aoyagi et al. (2025) studied this question.
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