Is there a good drink to give my child fluoride for his teeth health?

Yes and no: The aap discourages fruoride supplementation in the first 6 months& encourages parents to consult with local sources to define proper intake levels at any age. Some local water supplies have no Fluoride and some have levels that will provide suggested fluride amounts with regular tap water use. Some bottled water has Fluoride added in specific amounts. Check local sources.

City water: Most locales in the US have fluoridated water at levels sufficient for all humans. If you have another source, like, well water, then you should get a prescription for fluoride supplements from your physician based on the child's age.

Rinse don't drink: Fluoride works best to protect teeth topically, meaning while it is actually in your mouth getting on your teeth. When you swallow Fluoride (like in water) it comes back out in your saliva and topically gets on your teeth. If your water has Fluoride you probably don't need any extra. If you want additional Fluoride use a mouthwash with Fluoride that you then spit out, not swallow.

Rx supplements: The best time for your child to take Fluoride is as prescribed by your dentist as they are growing up! if teeth develop with the appropriate amount of daily fluoride, your child's teeth will be 60% less prone to tooth decay with no negative side effects. The Fluoride becomes part of the enamel and makes the tooth stronger! after age 18, topical application of Fluoride is all that's needed!

See your Dentist: Fluoride intake must be very carefully controlled to assure efficacy without harm. See your dentist to review Fluoride in water supply, toothpaste, supplements, mouth washes, etc. Don't do this yourself, see dentist or preferably pediatric dental specialist.