do brown fingernails indicate glutathione deficiency Total melanonychia of 20 nails as a rare manifestation of vitamin B12 Melanonychia: Causes, treatments, and diagnosis

Vitamins were first discovered almost 140 years ago by observing what happens when a certain population lacks them

The small sample size of the control group due to our unequal randomization resulted in wide variability in the control group, ultimately limiting our ability to assess for true causal relationships by adequately testing for between-group differences

10.1016/J.REDOX.2021.101950 160 RoyR

Pernicious anemia is a condition that happens when the body doesn't make enough red blood cells because the intestine cannot absorb enough vitamin B 12

Nanomedicine 16(3):221235 Taufiq A, Nikmah A, Hidayat A et al (2020a) Synthesis of Magnetite/Silica Nanocomposites from Natural Sand to Create a Drug Delivery Vehicle