Toasting or roasting sesame seeds alter their nutritional value. Studies show that the calcium levels are slightly higher when the seeds are toasted. For example, one could get 27 percent of their daily value of calcium in one ounce of whole sesame seeds, but 28 percent if the seeds are roasted. Likewise, one ounce of hulled raw kernels will get give you 2 percent of your daily value of calcium. That number doubles when the kernels are toasted.