When you purchase 2 of qualifying item(s), $5 Target gift card is added to cart automatically (as another item)
Target current promotions link (scroll down to Health section)
As luck would have it, there might be some items included that are not specifically "digestive-related"...
See this post for reference: Schiff Glucosamine plus MSM supplement at Target...found this item and noticed the $5 gift card promo...it's for real
Final cost: $13.58 for 2, plus $5 gift card (net $8.58 if your brain thinks that way)