The NAF B.L.K 500g is designed for nutritional support of the blood, liver and kidneys as it contains scientifically vertified, naturally sourced antioxidants to reduce the build up of free radicals within the horses' system. As reflected in poor blood profiles of these organs, this supplement targets these problems with specific herbal ingredients such as milk thistle and dandelion which improves the horses' diet and assists the organs in producing healthy blood profiles.