As an example there is evidence that early stages of hypertension can be reversed by using non-pharmacological prevention especially diet and physical exercises. However in the daily medical profession it may be more easy and quickly to prescribe pharmacological treatment than to use time with the patient to change habits of exercise and diet. Today there is a huge gab in the knowledge of how to non-pharmacological prevention can be adapted with good effect for these non-infectious disease. These problems also needs to be solved in the maritime area so there are important research questions that needs to be solved so that the non-pharmacological prevention can be useful at sea as well.