I think, generally, we are too quick to label something as "a scam."

Sometimes a supplement or therapy will help to a degree, but not to a degree where we consciously become aware of its effect.

So, for example, everyone knows that eating a healthy salad with a lot of leafy green vegetables is good for us.

But who FEELS the effect of eating that salad? We don't feel the effects, but it clearly is helping us.

So, some therapies or supplements may be giving us improvement at a low level...5% or 10% improvement, but it is not noticeable.

And then, some therapies / supplements may take months to show results.

from Dr. Andrew Weil, an Integrative Medicine, MD...

He seems very wise, grounded, down to earth and reasonable. Will easily advise traditional medicine over natural medicine. Not some fadist...

Neuropathy Symptoms and Treatments
https://www.drweil.com/health-wellness/body-mind-spirit/diabetes/neuropathy-symptoms-and-treatment/
Excerpt:

What neuropathy treatment and natural remedies does Dr. Weil recommend?

Your first step should be a general medical checkup to determine if an underlying disease or injury is the cause of your neuropathy symptoms, and if so, to determine its nature. Your doctor should do complete blood work and may refer you to a neurologist who will probably do an EMG (electromyelogram) to assess muscles and nerve conduction. If you have no underlying disease, you can try one or all of the following neuropathy foot treatment strategies:

Take one B-100 B-complex vitamin daily. The B vitamins are necessary for normal nerve function, and supplementing is a good preventive measure. Do not take more than 200 mg of B-6, as higher daily doses can actually cause symptoms of neuropathy.

Take 100 mg of alpha-lipoic acid daily. This antioxidant protects microcirculation to the nerves. You can gradually increase the dose to 300 mg twice a day over the next month.

Acupuncture can help relieve peripheral neuropathy pain. Additionally, a practitioner of Chinese medicine can provide you with herbs that may speed recovery. You might also try reflexology for neuropathy of the legs, feet and toes. If a toxic exposure is the cause, time is your greatest ally – injured nerves will slowly recover, as long as the exposure has stopped.