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. 2023 Jul 27;10:1184535. doi: 10.3389/fnut.2023.1184535

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Copyright © 2023 Nicolescu, Babotă, Barros, Rocchetti, Lucini, Tanase, Mocan, Bunea and Crișan.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Major classes of carotenoids and the bioconversion of β-carotene into two forms of vitamin A (retinal and retinol), demonstrating its function as provitamin A (103, 104).