Home Diabetes Glossary peak action peak action Thursday,January 4, 2023 ByDiabetesCare.net by DiabetesCare.net | Jan 4, 2023 | 0 comments the time period when the effect of something is as strong as it can be such as when insulin in having the most effect on lowering the glucose (sugar) in the blood. Submit a Comment Cancel replyYou must be logged in to post a comment.