Vitamins as Hormones

Vitamins as Hormones

Vitamins A and D are the fi rst group of substances that have been reported to exhibit properties of skin hormones, such as organized metabolism, activation, inactivation, and elimination in specialized cells of the tissue, exertion of biological activity, and release in the circulation. Vitamin A and its two important metabolites, retinaldehyde and retinoic acids, are fat-soluble unsaturated i...

Hormones and Vitamins: A Handbook for Physicians and Pharmacists

Atriopeptins as cardiac hormones.

NUMEROUS observations have implicated humoral factors in the homeostatic regulation of fluid and electrolyte balance. This review will focus on a recently discovered peptide that is synthesized and stored in cardiac atrial myocytes and exerts potent, selective, and transient biological effects. Characterization of the cardiac substance has shown that it is not related to endogenous Na,K-ATPase ...

Vitamins as asthmagens in the workplace.

[7] hypothesised that increased Daw,NO might be an early manifestation of asthma. However, we found no evidence to support this, since the distribution of Daw,NO was similar for both groups. In contrast, the range of Caw,NO values in the wheezers appeared to be higher than in controls. In asthmatics, Daw,NO is elevated compared with controls [7, 8] but Caw,NO is not [7]. Factors determining Caw...

Hormones as doping in sports.

Though we may still sing today, as did Pindar in his eighth Olympian Victory Ode, "… of no contest greater than Olympia, Mother of Games, gold-wreathed Olympia…", we must sadly admit that today, besides blatant over-commercialization, there is no more ominous threat to the Olympic games than doping. Drug-use methods are steadily becoming more sophisticated and ever harder to detect, increasingl...