Chemical Heart was created in 2001.
Melatonin is a natural chemical created in your body, so no it is NOT bad for your heart. Melatonin vitamins can be bad for your body but your heart is safe.
Heart of My Heart was created in 1926.
Heart to Heart was created in 1981-09.
Heart to Heart - film - was created in 1949.
Heart to Heart - album - was created in 1980-08.
Where My Heart Is was created in 1973.
Have Heart was created in 2002.
In My Heart was created in 2001.
What Can I Do with My Heart was created in 1987.
By Heart was created in 1997.
My Heart Sings was created in 1951.
Arrow Through the Heart was created in 1987-07.