All it takes is a handful of misuses to ruin something for everyone.
My friend Kim let me know that the Nature Made coupons found in the Walgreens Diabetes & You booklet have been recalled.
From what I know, there was also an unauthorized version of this coupon that was turned into a PDF and distributed creating more redemptions than the company had originally intended or will honor. Due to the unauthorized reproduction of these coupon, the coupon offer is withdrawn. That includes any coupons on these magazines that were obtained legally.
If you have any of these coupons lying around, be sure to destroy them and not use them as they will not be honored.
You can read more about it here.
If you want a legitimate Nature Made coupon, you can print a coupon for $2.00 off any TWO (2) Nature Made Products. That comes from coupons.com and is legit.