Bioaccumulation and non-carcinogenic health risk assessment of heavy metals in selected fish species from South Bay of Laguna Lake

Objective@#The study aimed to determine the concentration of three heavy metals namely, lead (Pb), cadmium (Cd) and chromium (Cr) present in head, stomach and muscle parts of Nile Tilapia (Oreochromis niloticu) and Blackchin Tilapia (Sarotherodon melanotheron) collected from different sampling sites in South Bay area of Laguna Lake and evaluate its potential health risk for adult consumers. @*Methods@#Live samples of Nile Tilapia and Blackchin Tilapia were hand-collected from three sites of South Bay of Laguna Lake during wet season. Raw and boiled samples were prepared for analysis. Heavy metal concentrations (mg kg-1) were determined through flame atomic absorption spectrophotometry (AAS). The potential health risk posed by more than one metal was calculated using the Total Hazard Quotient (THQ). @*Results@#The heavy metal detected with the highest concentration was Pb, present in Nile Tilapia. The mean concentrations of Pb, Cd, and Cr in both fish samples were high in the head part. Boiled samples have significantly lower concentrations of heavy metal (p<0.05) compared to raw samples. THQ values for Cd in raw fish samples were higher than the recommended level of exposure (THQ < 1.0). @*Conclusion@#The study revealed that cadmium is of greater concern in terms of possible adverse health effects associated with heavy metal bioaccumulation. However, the presence of other metals may further increase the risk of non-carcinogenic adverse effects. The lower health risk is predicted for boiled fish samples.

Prevalence and factors associated with folate deficiency among Filipino women of child-bearing age

@#Introduction: Folate deficiency is associated with many complications of pregnancy. A cross-sectional survey was conducted to determine the prevalence and factors associated with deficiency in red blood cell (RBC) folate among Filipino women of child-bearing age in the Province of Batangas, Philippines. Methods: A total of 184 Filipino women aged 15 to 49 years were interviewed on their socio-economic and demographic profiles. Mean energy and folate intakes were obtained using food recalls over a three-month period. RBC folate was used to measure long-term folate status and analysed through immuno-assay method. Results: About two in ten women were folate deficient based on the normal cut-off points (<400 ng/mL) preventive of neural tube defect-affected pregnancies. Respondents have very low intake of folate at 81 and 239 micrograms dietary folate equivalent (µg DFE) from dietary sources and with folic acid supplementation, respectively. Vegetable gardening and livestock raising (p<0.10) and use of folic-acid containing supplements showed significant correlations with folate status (p<0.05). Further, regression analysis showed that among the significant factors, the non-usage of folic acid-containing supplements showed increased likelihood of RBC folate deficiency by six times compared to users (OR=6.391, p<0.10). Conclusion: The findings of the study suggest a high prevalence of folate deficiency among Filipino women. Folate is an essential nutrient for healthy pregnancy. It is important that women, capable of bearing a child must assure adequate folate intake from foods and folic-acid containing supplements. The study recommends a more aggressive campaign on the importance of folate among women of child-bearing age.