“Some people report that when they start ketosis, they just feel sick,” says Kristen Kizer, RD, a nutritionist at Houston Methodist Medical Center. “There can sometimes be vomit, gastrointestinal distress, a lot of fatigue, and lethargy.” This so-called keto flu usually passes after a few days, she adds. But as a general weight-loss plan, keto is more controversial.
If you’re properly hydrated, many times the sticks will read a much lighter color than if you were dehydrated. The biggest advantage to measuring ketosis with urine sticks is that they are incredibly cheap and typically very easy to find. You can order them from Amazon, but they are usually available in pharmacies like Walgreens. While keto sticks can be ideal for a general answer to the question “Am I in ketosis? ” but will not provide an accurate measure of blood ketones.