Save up to 62% with the $15 sale at GNC. Stock up on diet aids, supplements, and multi-vitamins at a great price! The GNC Ultra Mega Green for Women or Men is regularly priced $39.99 for 120 caplets and is included in the $15 sale! Add to your cart to see the $15 price. Shipping is a flat rate of $1.99. Hurry, this sale ends today.