Pyridoxine hydrochloride is the most common supplemental form of vitamin B6. The body converts it to pyridoxal 5′-phosphate (PLP), the active coenzyme. PLP powers over 100 enzyme reactions, including amino acid metabolism, neurotransmitter production, and homocysteine control.
Many people take it to support energy metabolism, red blood cell formation, and nerve function. Others use it for mood balance, since it helps make serotonin and dopamine. It also helps keep homocysteine levels in a healthy range, which benefits the heart. Take it with a meal for best absorption.
The tolerable upper intake level (UL) for adults is 100 mg per day. Taking more than that over time can cause peripheral neuropathy, a type of nerve damage. The risk grows with higher doses and longer use. Stick to recommended limits unless a doctor tells you otherwise.