Bush Beats Star Vol-11, No-1, 2026

Vitamin D, or the "sunshine Vitamin," is a fat-soluble hormone precursor derived from both skin synthesis and dietary sources. About 80% is produced in the skin via UVB-induced conversion of 7-dehydrocholesterol to pre-Vitamin D3, while the rest comes from food and supplements. Both D2 and D3 are inactive and require hydroxylation in the liver and kidneys to form the active metabolite, 1,25(OH)2D.

Serum 25(OH)D is the best indicator of Vitamin D status, with optimal levels between 75–125 nmol/L for PTH suppression and calcium absorption; levels below 50 nmol/L indicate deficiency.

SSTIs involve microbial invasion of the skin, subcutaneous tissue, fascia, or muscle, mainly caused by bacteria and less commonly by viruses, fungi, or parasites. They may spread through lymphatic or hematogenous routes and are classified based on infection depth — superficial (impetigo, erysipelas, folliculitis, furuncles, carbuncles), intermediate (cellulitis), or deep (abscesses, fasciitis, myonecrosis).

SSTIs represent a significant cause of hospitalization and morbidity, with presentations ranging from mild infections such as impetigo to severe, life-threatening conditions like necrotizing fasciitis.