The age limit to participate in or provide your own Genetic Information for a DNA test is at least 18 years of age.
This requirement is in place because, according to FamilyTreeDNA Terms of Service, individuals must be at least 18 years old to agree to the terms on behalf of themselves or those whom they are the parent of or have the legal authority to agree for. Therefore, for adults, the age limit is a minimum of 18 years.