Realtone Keto: Research has pointed to health risks with yo-yo dieting, she added. Sharon Palmer, RDN, a nutritionist from California, noted that it is hard to achieve ketosis to begin with. “These side effects are a big concern about the mainstream keto craze, so I don’t endorse anyone following this diet without medical supervision,” Lehner-Gulotta said. While the OG Pink Drink wasn't keto to start, early keto band-wagoners quickly learned how to make it so that it was.