1. Vitamin C, which has previously been shown in some studies to reduce inflammatory markers in conditions like rheumatoid arthritis, may improve emotional state of acutely hospitalized patients.

    From the article:

    Patients administered vitamin C had a rapid and statistically and clinically significant improvement in mood state, but no significant change in mood occurred with vitamin D, the researchers discovered. […] About one in five acute-care patients in our hospital have vitamin C levels so low as to be compatible with scurvy,“ added Hoffer.

    Vitamin C, which concentrates in immune cells called neutrophils and lymphocytes at concentrations 50 to 100-times greater than plasma, play an important role in generating the so-called oxidative burst used by these cells to attack invading bacteria.