Limited time 20% OFF all MET-RX Products at Supplement Central When you use coupon code “MM20JAN” during checkout. Shipping is a FLAT $4 (Your full order ships for $4). For example, this unique Protein Isolate Gel price drops to $10.3 for 6 or $20.6 for 12 (2 packs) which is the lowest price we could currently find on this product. You can also check out the All Natural Whey 5LB (22g protein, no artificial sweeteners) which drops to $36 (again a current lowest price). International Shipping starts as low as $5.