Individuals take alpha-lipoic acid orally in the form of capsules or through injections based on a doctor?s recommendation, according to the University of Maryland Medical Center. Doctors suggest a daily dosage of 20 to 50 milligrams for general antioxidant support and 800 milligrams for diabetes and diabetic neuropathy.
Consult a health care professional before taking alpha-lipoic acid if taking diabetes, chemotherapy or thyroid medications, states the University of Maryland Medical Center. Taking alpha-lipoic acid leads to a higher risk of low blood sugar in diabetics, as the supplement interacts with diabetes medications. Alpha-lipoic acid also decreases thyroid hormone levels in people who are taking thyroid medications. Children should not take alpha-lipoic acid due to lack of supporting studies.