21st Century L-Lysine

21st Century L-Lysine provides the amino acid support you're looking for in a single tablet serving. L-lysine is a powerful nutrient that delivers targeted support to bone health by promoting the absorption of calcium while also fortifying the bones for long-term strength. It has also been studied for its support of muscle strength and general muscle tissue health, particularly among older women. As an added bonus, L-lysine may also support skin and joint health by serving as the primary constructive protein in connective tissues such as collagen. Other benefits offered by 21st Century L-Lysine include stress support and the promotion of a more positive mood. This is because L-lysine has been linked to enhanced serotonin receptor function, such as in the GI tract. In this way, it has been studied for its ability to promote the proper function of the neurotransmitter serotonin (a precursor to dopamine), while also potentially blocking the reception of stress- related hormones.