Indulge or resist? Sugar cravings can be a serious challenge. iStock hide caption itoggle caption iStock The Salt Is Sugar Addiction Why So Many January Diets Fail? January 9, 2014 Over the last few years, scientists who study the way food influences our brains and bodies have been moving toward a consensus that sugar is addictive. We've rounded up their tips on how to conquer cravings for one of nature's most pleasurable substances.