DL-Methionine is a precursor of L-Cysteine and L-Taurine and is essential for the synthesis of these substances. Additionally, L-methionine has antioxidant properties and can therefore protect the body from toxic substances and free radicals. It reacts with the damaging substances thereby preventing other substances or cells from being destroyed. The capacity of the body to excrete substances through urine is affected by the amount of L-methionine in the body and a deficiency can lead to problems in this area, such as fluid retention.