Tracked by Evreward since 2005, Swanson Health offers coupons, cash back rebates and rewards, with savings as high as 40% off. Swanson Health discount coupons are plentiful, usually available every month, and are often more valuable than similar merchants. Even when Swanson Health doesn't have a coupon, you can always get up to 15% cash back, and other great rewards, with every purchase.