Journal

Your body absorbs 49% of the calcium in sukuma wiki but only about 5% of the calcium in spinach, and sukuma wiki costs less per bunch too.

Chai during lunch can block most of the iron in your meal. Move it two hours later and you absorb roughly three times more from the same plate.

Fortified maize flour carries 15mg of iron per kg on the label, but phytates in the same flour can block more than half of it from ever reaching your blood.