- This human study adds to understanding of the effects of exercise on fluoride (F) metabolism.
- F pharmacokinetics following no, light, moderate and vigorous exercise were compared in adults.
- Moderate exercise resulted in the highest maximum plasma F concentration (Cmax).
- Area Under the Curve for plasma F concentration against time was also highest with moderate exercise.
- Moderate exercise may increase the fraction of systemically absorbed F, producing a biological effect.
The literature is sparse in terms of the effect of exercise on the pharmacokinetics of fluoride (F) in humans. In a 4-treatment repeated measures cross-over study, we investigated F pharmacokinetics following no exercise (control) and three exercise intensity conditions (light, moderate and vigorous) in healthy adults. At a pre-experimental session, 8 participants (18-30y) residing in a non-fluoridated-area, underwent a VO2 max test to guide the three exercise intensities for the experimental sessions. Participants were on a F-free regime one week before and throughout the four experimental weeks. We measured urinary F excretion (UFE), maximum plasma concentration (Cmax), lag time of Cmax (Tmax), and Area Under the Curve (AUC) for plasma F concentration against time, following F ingestion then no, light, moderate and vigorous exercise. Results showed no statistically significant difference in Tmax among all sessions; whereas Cmax for moderate exercise (226.2 ng/ml) was significantly higher than for no (27.0 ng/ml; p < 0.001), light (105.6 ng/ml; p = 0.016) and vigorous (94.2 ng/ml; p = 0.008) exercise. Mean AUC over 0–90 min following F ingestion was also significantly higher in moderate exercise than for no (p < 0.001), light (p = 0.004) and vigorous (p = 0.001) exercise. Mean UFE over 0–14h was 638.8, 718.7, 574.6 and 450.5 ?g for no, light, moderate and vigorous exercise, with no statistically significant differences among different sessions. In conclusion, this human experimental study suggests that moderate exercise may increase the fraction of F absorbed systemically which is therefore available to produce a biological effect. Future studies should be conducted with larger samples, different age groups and using different F doses.
*Original abstract and text online at https://www.sciencedirect.com/science/article/pii/S0045653520319913
Urinary and plasma fluoride levels in pregnant women from Mexico City
Highlights There is growing concern that fluoride may be a neurodevelopmental toxicant. We characterize urine and plasma fluoride levels in 872 pregnant mothers. Fluoride levels through pregnancy were relatively stable. Background: There is need to assess the developmental neurotoxicity of fluoride. Our knowledge of prenatal fluoride exposure is challenged as few
Cognitive impairment and risk factors in elderly people living in fluorosis areas in China
Residents living in fluorosis areas generally experienced long-term exposure to excessive fluoride in drinking water. The adverse effects of high fluoride levels on the nervous system have been studied; however, the effect of fluoride exposure on cognitive functions of elderly people in fluorosis areas is rarely reported. This study was
Fluoride levels and biochemical assessments in cattle accidentally exposed to hydrofluoric acid in Korea.
On September 27, 2012, an explosion from hydrofluoric acid occurred in Gumi city of Gyeongbuk province, Republic of Korea, exposing livestock animals nearby to Hydrofluoric acid (HF). This study aimed at evaluating the HF exposure among cattle raised near the accident site by determining the fluoride ion (F?1) levels and
Serum fluoride levels following commencement of methoxyflurane for patient analgesia in an ambulance service.
Editor—Methoxyflurane, once a frequently used anaesthetic agent,1 is re-emerging as an inhalation analgesic. In modern practice, it is given in doses of up to 6 mL via a proprietary patient-controlled self-delivery device2 with an activated carbon filter designed to adsorb some methoxyflurane vapour from the patient's exhaled breath.3 Methoxyflurane is an
Maternal and fetal exposures to fluoride during mid-gestation among pregnant women in northern California.
Background Previous studies have shown a correlation between fluoride concentrations in urine and community water fluoride concentrations. However, there are no studies of the relationship between community water fluoridation, urine, serum, and amniotic fluid fluoride concentrations in pregnant women in the US. The aim of this study was to determine the
Related Studies :