Angela Mae S. Tomas^{1, 2,}, Kenneth John Babaran¹, Madeilyn B. Estacio¹

Iodine deficiency disorder (IDD) remains a persistent public health concern in developing countries despite the implementation of universal salt iodization programs including policies such as the Philippine ASIN Law (RA 8172). Variations in salt processing, packaging, and storage may affect iodine stability and compromise program effectiveness. This study assessed the iodine and moisture content of salt sold in the Diffun Community Market, Quirino Province, Philippines, and evaluated their compliance with national iodization standards. A cross-sectional descriptive-analytical design was employed using total enumeration sampling, including 40 salt samples collected from 30 retail vendors. Samples were classified according to texture (refined or rock salt), packaging status (repacked or manufacturer-sealed), and storage conditions (dry/dark or moist/open). Iodine content was determined using WYD iodine testing kit, while moisture content was measured using a digital moisture analyzer. Data were analyzed using descriptive and inferential statistics including t-test, chi-square tests, and Pearson correlation at 0.05 level significance. Result showed a mean iodine content of 44.29 ± 28.41 mg/kg, indicating general compliance with ASIN Law standards. However, 22.5% of samples were iodine deficient. Most samples met acceptable moisture limits. Refined salt showed significantly higher iodine content and lower moisture level compared to rock salt (p <0.05). Packaging and storage conditions showed no significant differences, although trends suggested reduced iodine retention in repacked and poorly stored samples. Iodine content was significantly associated with texture (r = -0.483, p= 0.002) and packaging (r = 0.384, p = 0.014). These findings indicate that while compliance is generally achieved, inconsistencies in iodization and handling persist. Strengthening monitoring, improving packaging practices, and enhancing vendor awareness are recommended to ensure consistent iodine intake.

iodine deficiency, iodized salt, moisture content, ASIN Law, salt quality, Philippines