Dietary supplements are widely used by breastfeeding women, yet many lack proven safety, efficacy, and consistent quality due to limited regulatory oversight. Variability in product content, misleading labeling, and reactive (rather than proactive) FDA oversight mean that consumers may unknowingly be exposed to ineffective or even harmful products. While third-party certification can help mitigate some risk, supplement use in lactation should be approached with caution, as product safety cannot be assumed based on labeling or “natural” claims alone.