Melatonin Drinking and Weight: Separating Fact from Fiction
Melatonin is one impressive hormone. But according to Aviva Romm, M.D., melatonin may affect weight gain—well, depending on what time you take it.
The Truth About Melatonin and Weight
While melatonin supplements are widely used to promote better sleep, many people are wondering if it can contribute to weight gain. But is melatonin really the culprit behind weight gain, or is there something more at play?
The Role of Disrupted Sleep in Weight Gain
Research suggests that disrupted sleep patterns, not melatonin itself, are the primary cause of weight gain. When we don't get enough sleep, our bodies produce more ghrelin, a hormone that stimulates appetite, and less leptin, a hormone that suppresses appetite. This can lead to overeating and weight gain.
How Melatonin Affects Weight
While melatonin supplements may not directly cause weight gain, they can influence body weight in other ways. For example, some studies have found that melatonin can increase fat burning and reduce body fat, particularly in individuals with obesity.
The Importance of Timing
Aviva Romm, M.D., notes that the timing of melatonin supplementation can affect weight gain. Taking melatonin at the wrong time can disrupt the body's natural sleep-wake cycle, leading to weight gain.
The Science Behind Melatonin and Weight

A systematic review of controlled trials on the effects of melatonin on human subjects found that melatonin supplementation had a relatively weak effect on weight loss. However, the review also found that some studies suggested a potential role of melatonin in reducing body weight, particularly in individuals with obesity.
The Connection Between Melatonin and Appetite Hormones
Melatonin has been shown to interact with appetite hormones, including ghrelin and leptin. While the exact mechanisms are not fully understood, melatonin may help regulate appetite and food intake, leading to weight loss.
The Bottom Line
While melatonin supplements may not directly cause weight gain, they can influence body weight in other ways. Disrupted sleep patterns, not melatonin itself, are the primary cause of weight gain. By prioritizing sleep and using melatonin supplements responsibly, individuals can potentially reap the benefits of weight loss and improved overall health.
Frequently Asked Questions
- Does melatonin cause weight gain?
- Can melatonin help with weight loss?
- What is the ideal dosage of melatonin?
- Can I take melatonin with other supplements?
No, melatonin does not directly cause weight gain. However, disrupted sleep patterns, which can be influenced by melatonin, can lead to weight gain.
Yes, melatonin has been shown to increase fat burning and reduce body fat, particularly in individuals with obesity.
The ideal dosage of melatonin varies from person to person and depends on factors such as body weight, metabolism, and overall health.
It's best to consult with a healthcare professional before taking melatonin with other supplements, as interactions can occur.
Conclusion
Melatonin is a complex hormone that plays a role in sleep and weight regulation. While it may not directly cause weight gain, it can influence body weight in other ways. By understanding the science behind melatonin and weight, individuals can make informed decisions about their sleep and weight management strategies.