Use the code MENSHLTH to take 30% off almost Any Item at GNC. Although some items are excluded from the discount, it's typically because they are part of another promotion like BOGO 50% off, as noted by their product pages. Shipping adds $3.99 for any order. Using the code on these GNC Triple Strength Fish Oil 1500 Soft Gels drops the price from $26.99 to $18.89, making it the best price we could find for them by $8. The code does not stack with other discounts and sales tax is charged in most states.