DNA. complementary DNA (cDNA), copy DNA DNA transcribed from a specific RNA through the action of the enzyme reverse transcriptase. mitochondrial DNA (mtDNA) the DNA of the mitochondrial chromosome, existing in several thousand copies per cell and inherited exclusively from the mother.
Castor Oil. Castor oil is another good treatment for dry and chapped lips. Simply apply castor oil to your lips several times a day. You can also make a soothing treatment using one teaspoon of castor oil, one teaspoon of glycerin and a few drops of fresh lemon juice.
Use a humidifier. Air can become dry in your home during the winter, which may cause chapped lips. Using a humidifier in your home during the winter may help to prevent lip chapping. Try using a humidifier in your bedroom at night or on extra cold days. Try to keep the humidity levels in your home between 30 to 50%.