I stand corrected. If NASA is using it, it probably works. Astronauts’ bone loss can be up to 2% per month while in space.
“There have been thousands of scientific research papers published on the subject of PEMF over the last fifty years. Our planet generates a geomagnetic field from its molten iron core and the rotation of the earth. Additionally, within our ionosphere is the Schumann frequency, which is produced by lightning strikes and solar flares. This Schumann frequency resonates within our ionosphere at 7.8 hertz (Hz), which is classified as a very low frequency. It becomes clear that all of life on planet earth has developed in both this geomagnetic and Schumann frequency environment. Furthermore, Dr. Thomas Goodwin, a NASA scientist, patented a magnetic field generator that uses a low frequency similar to the natural Schumann frequency of the earth that is designed to heal tissues of mammals. This magnetic generator was patented in 2009.”
“There are numerous podcasts about PEMF by the likes of Ben Greenfield, Dave Asprey, etc. Of all the technologies listed, I know of only one system, product or device is such a simple and safe system to use. This is natural and earth-based PEMF (pulsed electromagnetic field) therapy.”
“Over 30,000 studies, including 2,500 placebo-controlled, double-blind studies have proven the applicability and efficacy of PEMF using low frequency, low intensity, pulsed electromagnetic fields for human health and wellbeing.”
And yet they don’t reference a single double-blind scientific study.
It certainly appears that NASA invented and patented the technology used today.
Are there any studies indicating it prevents osteoporosis in women for example?
How long do you have to use it? Every day, week, once a month.

For most men, bone loss will not be a problem.
It looks like PEMF therapy would be more beneficial for women.
“Osteoporosis is a bone disease that develops when bone mineral density and bone mass decreases, or when the structure and strength of bone changes.”
Oddly. or not, PEMF is not listed as a treatment in anything I can find for osteoporisis at any major institutions such as the Mayo Clinic, etc or in publications such as The New England Journal of Medicine.
The only people pushing PEMF for osteoporosis treatment are the people selling the machines.
The main treatments for osteoporosis seem to be calcium and vitamin D supplementation, weight-bearing exercise, medications, and lifestyle modifications.