Pregnancy tends to be a time when you examine your diet and make healthy changes. For many expecting mothers, this means cutting back on sugar, which often means increasing the use of sugar substitutes. Throughout evolution, humans have learned to tie sweetness to calorie-rich foods. Now we have access to alternatives that taste very sweet but have zero nutritional value and no calories. Plus, in recent years concerns have been raised over the safety of artificial sweeteners, especially during pregnancy. This episode examines the evidence on natural and artificial sweeteners and their safety during pregnancy and breastfeeding.