(2023) Effect of dietary patterns on cognitive functions of older adults: a systematic review and meta-analysis of randomized controlled trials
For example, proton pump inhibitors, PPIs, can affect worsen vitamin b12 deficiency
Nousbaum, J-B, Pol, S, Nalpas, B., Landais, P., Berthelot, P., and Brchot, C (1995) Hepatitis C virus type lb (II) infection in France and Italy Ann Intern Med 111 , 161168 El-Zayadi, A., Selim, O, El Haddad, S, and Hamdy, H
Vegetarians and vegans get very little L-carnitine from their diet (about 1012%), meaning they may need to make as much as 90% of their daily needs [65,67]
Xu, D., Sun, L., Li, C., Wang, Y
They found that in ovo carnitine administration did not influence hatchability traits but increased the absolute and relative weights of hatchling