What is Fluoride
Fluoride varnish is a topical fluoride therapy. In this treatment, a concentrated form of fluoride is usually painted or coated on the tooth surface by a dentist or a dental hygienist.
Go for fluoride free toothpaste. Even if you are not allergic to fluoride, the systemic risks are way too high than tooth decay. Fluoride in small quantity in controlled units prevents tooth decay, but the same when ingested massively can cause systemic toxicity.
Fluoride is a non-metal mineral found naturally in some foods, and water. It has a high affinity for calcium, which means that it reacts well with calcium. This explains why it positively affects our teeth and bones, which contain calcium in large amounts.