This is because you're most probably reducing your carb intake by about 50 %, and your body needs time to adjust to this. (primalpaleo.com)
One of the best recipes for reducing the carbs intake in a healthy way is not to consume low quality carbs, and to especially avoid the simple sugars. (fitnessandpower.com)
However, I am trying to encourage my husband to reduce his carb intake so I made a batch of this ketchup. (ketodietapp.com)