All vitamin deficiencies are reversible, except in the very late stages, by means of supplying the organism with the vitamin in shortage. By using pharmaceutically synthesized vitamin supplements, the amount of a particular vitamin in an organism may be restored to the required level very quickly.

Although “Bobbies” (so named after Peel) were not immediately popular and were often seen as a potential infringement on civil liberties, their work resulted in a sharp decline in crime rates and the overall structure and organization of the force became the example from which New York City created the first police department in the United States in 1844.

It is difficult to determine the exact necessary vitamin intake for an organism, since there are several factors involved, in particular genetic variation and environmental conditions. Consequently, recommended daily allowances are higher than the needs of the average person so that particularities caused by the above-mentioned factors are covered.