GNC.com has a 25% off today-only coupon that stacks with a B1G1-50% promo — ONLY for the 10lbs bag size of the Double Rich Chocolate flavor.

The 5lbs tubs, which include more flavors, do NOT qualify for B1G1-50% — but the 10lbs bag of Double Rich Chocolate does.

Cost:
— 45cents/serving
— There have only been 2 sales all year so far where they have been under 50cents/serving (earlier than this year I don’t have records, but I doubt it’s been cheaper).
— If you have Discover, their shopping portal takes off another 10% — 20% if you signed up under their double cash back promo!!