Melatonin Natural Health Products and Supplements: Presence of Serotonin and Significant Variability of Melatonin Content

This study evaluated 31 melatonin supplements, revealing significant inconsistencies in melatonin content, ranging from -83% to +478% of labeled amounts. Some products also contained serotonin, an unlisted ingredient with potential health risks. Variability was observed across product types and brands, raising concerns about supplement quality. These findings emphasize the need for stricter manufacturing and labeling standards to ensure consumer safety and reliable use of melatonin for sleep and cognitive health.

If using melatonin, choose reputable brands and consult healthcare providers to minimize risks. For safety, combine supplements with natural strategies like maintaining consistent sleep schedules and minimizing screen time. Be cautious, as supplement quality can vary widely, affecting efficacy and safety.