In a report entitled, Optimal prandial timing of bolus insulin in diabetes management: a review, looked at data from several studies and concluded that taking rapid-acting insulin 15–20 minutes before a meal provides significant improvements in post-meal control and was recommend by the authors to be done ‘whenever safely possible’. They also concluded that people with diabetes who routinely bolus pre-meal have better HbA1c values and that post-meal bolusing (insulin ‘chasers’) increase the risk of hypoglycaemia.
Advice about timing of bolus needs to be tailored in some special circumstances (e.g. pregnancy, emergency work, gastroparesis).
http://bit.ly/Pre-bolusing_comeback
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