Acesulfame-K (Ace-K)

Acesulfame-K (acesulfame potassium) is a calorie-free sweetener found in many diet beverages and processed foods. It does pass into breast milk in small amounts — one study found measurable levels — but current evidence does not suggest harm to nursing infants at normal dietary intake. It's approved by the FDA and considered safe while breastfeeding.

Always confirm with your doctor or lactation consultant before making dietary changes while breastfeeding.