What Sa said. Eating whole foods like fruits and veggies I can find at a regular supermarket saved my family a whole lot of money. Of course I needed to adapt my taste a bit to accept a wider range of veggies... But overall, I ended up spending less on food.
Well until the new health care law limits FSA's to $2,500 you can use that to buy food.
If you have a HSA/FSA and say a box of gluten-free Spaghetti is $5.00 and a box of regular spaghetti is $2.50 then you can use the $2.50 difference out of your HSA/FSA and buy the extra cost pre-tax.
The new health care laws however will limit that to $2,500 in total which will create additional tax revenue. We easily hit 6-7 thousand dollars a year in FSA/HSA spending between prescriptions and the rest.
Bulk purchases of staple foods usually help. We order a few hundred dollars at a time of gluten-free pasta's because BiAglut is expensive but buying in bulk reduces the cost about 40 percent.