Artificial Sweeteners

Safety Status: Safe in Moderation (With Exceptions)

Most FDA-approved artificial sweeteners and sugar substitutes are safe to consume in moderation during pregnancy.

However, they are not all created equal. The U.S. Food and Drug Administration (FDA) and the American College of Obstetricians and Gynecologists (ACOG) evaluate each sweetener individually. While compounds like aspartame and sucralose have strong safety records, saccharin is classified as unsafe and should be strictly avoided.

Understanding these differences is crucial for protecting maternal and fetal health.

Safe Sweeteners vs. Sweeteners to Avoid

When choosing sugar substitutes during pregnancy, use the following classifications:

Approved and Safe Sweeteners

• Aspartame (Equal/NutraSweet): Highly studied and deemed safe for pregnant individuals. The exception is for individuals with Phenylketonuria (PKU). PKU is a rare genetic disorder where the body cannot break down the amino acid phenylalanine. Since aspartame contains phenylalanine, it can accumulate to dangerous levels in individuals with PKU, potentially causing fetal brain damage.
• Sucralose (Splenda): Safe to consume. It is a chlorinated sugar derivative that passes through the human digestive tract largely unabsorbed, leaving no chemical residues.
• Acesulfame Potassium (Ace-K/Sunett): Safe in moderation; commonly blended with other sweeteners in diet sodas.
• Stevia (Rebaudioside A): High-purity stevia leaf extracts are generally recognized as safe (GRAS) by the FDA. Note that raw stevia leaves or crude stevia extracts are not FDA-approved and should be avoided.

Sweetener to Avoid Entirely

• Saccharin (Sweet’N Low): STRICTLY AVOID. Saccharin is a synthetic sweetener that readily crosses the placental barrier. Fetal kidneys clear substances much slower than adult kidneys, causing saccharin to accumulate in fetal tissues. Because of concerns regarding its long-term tissue accumulation, healthcare providers recommend avoiding it entirely during pregnancy.

Nutrition and Hydration Cautions

While sugar-free foods can help manage gestational weight gain and gestational diabetes, consider these dietary tips:

• Avoid Nutritive Displacement: Relying on artificially sweetened beverages (like diet sodas or crystal light packets) can displace intake of essential pregnancy fluids like water and pasteurized milk.
• Gestational Blood Sugar Management: If you are using sweeteners to manage gestational diabetes, pair them with a healthy lifestyle. Remember that some “sugar-free” baked goods still contain high levels of carbohydrates and fats that can impact blood glucose.
• Microbiome Health: Emerging studies suggest that excessive intake of artificial sweeteners may alter the maternal gut microbiome, which plays a role in digestive health and immune function.