From the 2015 press release:
Wellness discounts and career planning
As part of our team member benefits, we’re offering a new wellness discount that gives all U.S. team members an additional 20 percent off fresh and frozen fruits and vegetables, Simply Balanced items and C9 activewear, on top of their existing employee discount. Additionally, we’re enhancing team member career-growth and career-planning support to help focus on longevity and personal fulfillment at Target.
Simply Balanced is being phased out in many categories but where it still exists, the discount applies. C9 is being phased out but where is still exists the discount applies. All in Motion is replacing C9 and also gets the 20% wellness discount. So fresh and frozen fruits vegetables all brands get the discounts. Things like milk, applesauce, chips, dried fruit would only get a discount if branded Simply Balanced. Good and Gather does not automatically get the discount (with the exception of frozen and fresh vegetables and fruit). In addition any Target branded nicotine cessation product.
Things that the normal 10% discount does not apply to would be gift cards (Target, Amex, MC, Visa, or any 3rd party gift card), prescription drugs, alcohol.