Which of the following is NOT a means of fluoride delivery?

Standard toothpaste with no fluoride is indeed not a means of fluoride delivery. Fluoride is a key component in many dental care products because it helps to remineralize enamel and reduce the risk of dental caries. However, when a toothpaste does not contain fluoride, it lacks the capability to provide any of the protective benefits associated with fluoride use.

In contrast, other options mentioned—such as fluoridated bottled water, prescription-strength fluorides, and dietary fluoride supplements—are all recognized methods of delivering fluoride to enhance oral health. Fluoridated bottled water contains an appropriate level of fluoride to help strengthen teeth, while prescription-strength fluorides are often used under professional supervision for patients at higher risk of cavities. Dietary fluoride supplements provide an alternative way to ensure adequate fluoride intake, especially in areas where water fluoridation is not available.

Thus, the correct answer reflects the absence of fluoride in standard toothpaste lacking this key ingredient, distinguishing it from the other listed methods of fluoride delivery.