The reason the foot is numb is that the majority of S1 end sensory receptors are located in the foot. If you examine the leg very carefully, you might find a “line” of numbness down to the foot. RFA to the foot makes no sense as the injury is in the lumbar spine. Killing sensory roots in the foot will not change the numbness pattern. It’s like phantom leg syndrome after an amputation. The foot may be painful but does not exist.
Agmatine sulfate is a supplement, an amino acid. I’m not sure it can help but shouldn’t be a problem to take. Alpha Lipoic Acid is a supplement sometimes mentioned for nerve healing. I can’t hurt to take it in moderation.
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Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.