Alpha-lipoic acid is a fatty acid your body makes naturally. It acts as an antioxidant and helps turn glucose into energy. Many people take it as a supplement to support nerve health and strengthen the body's antioxidant defenses.
Capsule delivery on an empty stomach is typical, though some formulations call for different timing. Watch for interactions if you take diabetes medication, because alpha-lipoic acid can lower blood sugar. Speak with a healthcare professional before adding it to your routine.