Which one of the following is an example of a systemic fluoride oral health product?

A systemic fluoride oral health product is one that is ingested and becomes part of the body's systemic circulation. This allows fluoride to be distributed to the teeth and other tissues. Fluoride tablets are an example of this because they are taken orally and enable the fluoride to act systemically, helping in the development of tooth enamel and providing protection against decay.

In contrast, fluoride gels, mouthwashes, and toothpaste are categorized as topical fluoride products. These are applied directly to the teeth and work locally by strengthening the enamel and reducing the risk of cavities, but they do not enter the systemic bloodstream in the same way as an ingested product would. Thus, the fluoride tablet is the only option that fulfills the criteria of being a systemic fluoride product.