Ursula Schwab on väittänyt, ettei karppausruuasta saa riittävästi kaikkia tarvittavia ravinteita, kun siinä ei ole leipää. Tässä toisenlaista tutkimustietoa:
http://bmjopen.bmj.com/content/8/2/e018846Lainaa:
Conclusion
Despite macronutrient proportions not aligning with current national dietary guidelines, a well-planned LCHF meal plan can be considered micronutrient replete. This is an important finding for health professionals, consumers and critics of LCHF nutrition, as it dispels the myth that these diets are suboptimal in their micronutrient supply. As with any diet, for optimal nutrient achievement, meals need to be well formulated.