Trace elements and minerals in drinking water and cognitive function
In this systematic review, silica in drinking water was somewhat consistently associated with better cognitive function in older adults, whereas no trace elements and minerals (including aluminum and fluoride) in drinking water were consistently associated with worse cognitive function.
Herbal vs homeopathic vs. conventional toothpastes for oral acidity and bacteria counts
Use of aloe vera, probiotic, and fluoride mouthwashes with orthodontic devices
Comparison of the effects of normal and high fluoride intakes