If blood glucose levels are higher than 250 mg/dL without ketones, what is the recommended action?

When blood glucose levels exceed 250 mg/dL but do not show the presence of ketones, the recommended action is to hydrate to help bring glucose levels back into the desired range. Adequate hydration is essential because it assists in diluting the blood glucose levels and can also promote kidney function to excrete excess glucose through urine.

In addition, staying hydrated can help manage the body's osmotic balance, which can be disrupted at elevated blood sugar levels. This approach is particularly beneficial for individuals with diabetes, preventing potential complications associated with high blood glucose concentrations.

Exercise can lead to further glucose spikes in this situation due to the body's stress response, and fasting may lead to worsening dehydration or potential metabolic complications. Increasing carbohydrate intake contradicts the goal of lowering glucose levels, as it would further elevate blood sugar rather than assist in bringing it back down. Hence, focusing on hydration is the most effective strategy in this scenario.