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.
Other effective treatments include coconut oil, glycerin, l-lysine and lanolin. Manuka honey mixed with coconut oil, mustard oil and shea butter are also effective options. Gently exfoliating the dry skin on the lips using sugar and then rehydrating them with Vaseline can also eliminate dry chapped lips. Vitamin B2 and vitamin B complex vitamins also support healthy skin.