ASSESSMENT OF HEAVY METALS CONTAMINATION IN BLEACHING CREAMS AND IT'S PUBLIC HEALTH IMPLICATIONS

The use of skin-lightening products has increased significantly in Nigeria and other developing countries, despite growing concerns about their safety. Many bleaching creams contain hazardous heavy metals, including mercury, lead, arsenic, and cadmium, which can pose severe health risks. These toxic elements accumulate in the body over time, potentially leading to kidney damage, neurological disorders, cancer, and skin-related complications. This study evaluates the levels of heavy metals in commonly used bleaching creams and examines their potential public health implications. Ten different brands of bleaching creams were randomly sampled from local markets in Owerri, Imo State, Nigeria. The samples were analyzed using Atomic Absorption Spectroscopy (AAS) to detect the concentrations of lead (Pb), cadmium (Cd), chromium (Cr), manganese (Mn), nickel (Ni), and copper (Cu). A mixture of concentrated nitric acid (HNO₃) and sulfuric acid (H₂SO₄) was used for sample digestion, ensuring effective breakdown of organic matter and accurate quantification of heavy metal levels. Statistical analysis was conducted to compare the results with permissible limits set by the World Health organization (WHO). The results revealed that all tested samples contained lead, with concentrations ranging from 0.068 ppm to 0.127 ppm, exceeding the WHO safety limit of 0.05 ppm. Cadmium was detected in all samples, with the highest concentration recorded at 0.096 ppm, far above the permissible limit of 0.01 ppm. Chromium levels were below the regulatory threshold, with a maximum concentration of 0.078 ppm. Manganese concentrations ranged from 0.367 ppm to 1.783 ppm, all within the WHO limit of 5.0 ppm. Nickel was detected in all samples, with concentrations exceeding regulatory limits in several brands, particularly in Sample G (0.3955 ppm). Copper concentrations varied, with Sample A containing the highest amount (0.5697 ppm), surpassing the WHO limit of 0.1 ppm. These findings suggest that many bleaching creams available in Nigerian markets contain unsafe levels of heavy metals, raising serious concerns about their safety for prolonged use. Chronic exposure to lead and cadmium in these products poses significant health risks, particularly to women who frequently apply them. The presence of nickel and copper, known allergens and potential toxins, further emphasizes the need for regulatory intervention. The study underscores the urgent need for stricter regulatory enforcement, improved consumer awareness, and public health initiatives to mitigate the dangers associated with heavy metal contamination in cosmetics. Recommendations include implementing rigorous product testing before market approval, strengthening consumer protection laws, and promoting the use of safer alternatives. Further research should focus on assessing the long-term health impacts of heavy metal exposure through cosmetics and exploring alternative skin-care products that comply with international safety standards.