Is there any proof that the amount of fluoride that commonly used in toothpaste is unhealthy?
Fluoride Alert is an anti-fluoridation group and has no credibility in the scientific community.
The fluoride in toothpaste has a concentration of 1,000 to 1,500 ppm of fluoride (which is considerably higher than fluoridated water at 0.7 ppm). A small child would need to eat approximate two tubes of toothpaste in order to become seriously ill. However, the other ingredients would cause vomiting long before a dangerous amount was ingested. As for fluorosis, dentist recommend that very young children be given a pea-sized bit of toothpaste on their brush and instructed to spit out the toothpaste. This precaution is so that the child can avoid getting mild to very mild fluorosis, a purely cosmetic effect in which very tiny, snowflake-like spots develop on the surface of the teeth. It is actually an indication that the teeth are especially resistant to decay. The CDC website has photos of various stages of fluorosis. Moderate to serious fluorosis appears to occur more from drinking private well water with very high levels of fluoride.
Institute for Science in Medicine: http://www.scienceinmedicine.org/policy/statements/fluoridation.pdf
For children under 2 years of age, refer to the CDC's advice: