should use a concentration of 50% when visiting areas of the world with malaria. A lower concentration of 10% is recommended for infants and children. Health Canada decided in 2002 to limit DEET concentration to 30% in the country from the end of 2004 due to an increased long-term health risk observed with repeated applications.

DEET is often sold and used in spray or lotion in concentrations up to 100%. Consumer Reports report