Why are halogens like Betadine commonly used in antiseptics?

Halogens, including Betadine (which contains iodine), are commonly used in antiseptics primarily because they possess strong disinfectant qualities. This ability comes from their effectiveness in destroying a wide range of pathogens, including bacteria, viruses, and fungi. Their mechanism of action involves disrupting the protein structure and cellular function of microorganisms, which is critical for achieving antiseptic effects.

While the cost-effectiveness of halogens could contribute to their usage, their true value lies in their potency as disinfectants. Additionally, although products like Betadine are designed to be minimally irritating to the skin, they can still cause reactions in some individuals, so they are not universally harmless. Immediate elimination of infections is not accurate either, as various factors influence the time it takes for an antiseptic to work and clear an infection. Therefore, the strong disinfectant qualities of halogens are the primary reason for their common use in antiseptics.