Tracked by Evreward since 2011, A1 Supplements offers coupons, cash back rebates and rewards, with savings as high as $5 off. A1 Supplements discount coupons are somehwat rare, available a few times each year, but are often more valuable than similar merchants. Even when A1 Supplements doesn't have a coupon, you can always get up to 10% cash back, and other great rewards, with every purchase.