Personalized Girlfriends Best Medicine WHT Youth T-Shirt. Cute Youth T-Shirt - Black for girlfriends with white daisies, text and borders says GIRLFRIENDS ARE THE BEST MEDICINE. Perfect gift for your BFF, the girls in your book club or bible study. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.