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doi: 10.1002/iub.1195

I came to them needing help and they did just that

Cellular and Molecular Biology (Noisy-Le-Grand), 61 , 94100 Yang, S., Li, X., Yang, F., Zhao, R., Pan, X., Liang, J., Tian, L., Li, X., Liu, L., Xing, Y., & Wu, M

The UL does not apply to vitamin A derived from carotenoids
