The companies that continue to promote the IgG blood tests either do not fully understand the function of the IgG antibody or worse, they do and are continuing to sell their product anyway.
2020 is the start of a new decade or the end of the last one depending on your point of view. Time to pick up some new ideas and strike a new path ahead on your fitness journey.
Fun fact in case you missed it—the only difference between brown and white eggs are that brown eggs come from chickens with brown feathers and white eggs come from chickens with white feathers.