Excerpt
The National Academy of Medicine (NAM), previously known as the Institute of Medicine, recommends a daily intake of 3 mg of fluoride for women aged 14 to 50. The NAM also notes that most research indicates that a daily intake of 10 mg for 10 or more years is necessary to produce clinical signs of mild skeletal fluorosis; thus, the upper intake limit is regarded as 10 mg/day29. The Food and Drug Administration has also stated that 10 mg/day is the upper intake limit29. While fluoride has
Abstract
We in situ assessed the influence of natural fluoride concentrations in lotic freshwater ecosystems on diet and morphology of Boana cordobae tadpoles. Two streams were sampled in Argentina: Los Vallecitos stream (LF-LV) and Los Cerros Negros stream (HF-CN) with low and high fluoride levels, respectively. We captured tadpoles of B. cordobae in each stream using nets. Body weight (BW), total length (TL) and body condition (BC) of tadpoles was registered. Food items were identified to