As mentioned, there are naturally occurring carbs and fats that can only be removed though extensive processing, as well as other micronutrients depending on the original source. (blog.nkdnutrition.com)
To address other micronutrient deficiencies, researchers in the Laboratory of Plant Biotechnology of Professor Gruissem at ETH Zurich and in other countries also developed rice varieties with increased iron levels in the rice and wheat grains, for example. (sciencedaily.com)
However, exclusive breastfeeding up to 6 months may lead to deficiencies of iron and various other micronutrients. (newbornbabyzone.com)