Micronutrient deficiency is a risk
A big issue that nutritionists have with all restrictive diets is that it eliminates good sources of important nutrients. Whole grains and high GI vegetables provide many of those vitamins and minerals, so if you aren’t careful to get those from other foods or take supplements, you can become deficient. The top three gaps: sodium, potassium, and magnesium. You are the highest risk of losing these during the first weeks of the keto diet, since you’re losing a lot of water weight. Be sure to stay thoroughly hydrated and eat foods rich in these nutrients the first few weeks of your diet.