Would having to wait 25 seconds for your snack prompt you to make healthier choices at the vending machine? New research suggests the answer is yes. M. Spencer Green/AP hide caption toggle caption M. Spencer Green/AP The Salt Forcing People At Vending Machines To Wait Nudges Them To Buy Healthier Snacks March 31, 2017 Buy an unhealthy snack and these vending machines take away 25 seconds of your life you'll never get back. Healthy fare drops instantly. Research suggests this "time tax" helps us make better choices.