So Schwarzbein is an MD who believes in the unfounded diagnosis "Adrenal Burnout" that the medical community does not even recognize, so that's one red flag about her.
The bigger red flag is that Schwarzbein has her own line of supplements!
If her diet is so great, why the need for so many supplements?!
The diet she promotes is the typical high-fat/low-carb diet that's so trendy in the "alternative medicine" community and just as Durianrider says, all gurus who promote a high-fat diet push supplements.
Dr. Schwarzbein looks to be a snakeoil salesperson just like Dr. Mercola, Dr. L Wilson, and Dr. Lam, all are doctors that believe in questionable diagnosis like "AF", all promote high-fat/low-carb diets, and all are supplement pushers.