Leptitox Side Effects Exercises to strengthen the lower parts of the face Pronounce the vowels loudly and clearlyPlace your hand under the chin (with the palm of the hand facing up). Pressing with your hand on the chin, open slowly and close your mouth. The hand should resist the jaw - this way you stimulate the chin muscles to work. Arrange your lips as if you wanted to give someone a juicy kiss, and then stretch your lips in a straight line. Repeat several times.
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