New Study Reveals Melatonin Supplements Aren’t Always Labeled Correctly

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When it comes to melatonin supplements, what you see is not always what you get. A recent study found that 22 out of 25 over-the-counter melatonin supplements were inaccurately labeled. Some supplements contained 74% of the listed amount, while others had 347% more melatonin than what was posted on the label. 

Our bodies naturally produce melatonin in order to regulate our circadian rhythm and help us fall asleep, but about 27.4% of adults take melatonin supplements as a sleep aid. So what happens when you don’t consume the amount you intended? Let’s take a closer look.

How Much Melatonin Do You Need?

Because melatonin is not regulated by the U.S Food and Drug Administration (FDA), there aren’t strict guidelines about how much a person should consume. That said, most experts encourage adults to take between one and five milligrams 30 minutes before bed.

If you take more melatonin than you need, you’re at a higher risk of experiencing side effects such as:

  • Nightmares and vivid dreams
  • Dizziness
  • Drowsiness
  • Anxiety
  • Nausea 
  • Abdominal cramps
  • Short periods of depression

Read our full melatonin and sleep guide for more information about this popular over-the-counter (OTC) supplement.

What’s the Best Melatonin Supplement?

You can never tell exactly how much melatonin is in OTC supplements, so finding the right one can be tricky. For the best results, we recommend consulting a pharmacist. They will likely recommend products that are certified by third-party organizations like the U.S. Pharmacopeia

man holding a melatonin pill - can you overdose on melatonin?

Melatonin Alternatives

Though popular, melatonin isn’t the only supplement that can improve your sleep. Here are a few other sleep aids that may help. Please note: The following list should not be taken as medical advice. Consult your doctor before taking a new supplement.

  • Magnesium correlates with our body’s natural production of melatonin, and some studies suggest it can help people get the sleep they need.
  • Ashwagandha is a natural herb that can help lower cortisol, the stress hormone. It can be taken in supplement form, or you can drink it in a tea.
  • Valerian Root, whether consumed in a tea, supplement, or oil, can help alleviate stress and help people sleep better. Like ashwagandha, it can take a few weeks for people to notice the full effect. 
  • Kava is another popular supplement that promotes relaxation and sleep. It’s made from the piper methysticum plant, and it can be ingested through teas, tinctures, and pills.

The Takeaway

Because the labels aren’t always correct, it can be difficult to know exactly how much melatonin you’re taking. Consuming more than five milligrams of melatonin before bed can increase the likelihood of negative side effects such as grogginess, cramps, and nausea. Discuss the options with your doctor before trying a new OTC sleep supplement.

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Elisa Regulski

Elisa Regulski

Editor and Certified Sleep Science Coach

About Author

Elisa is an editor at Mattress Clarity where she tests mattresses, accessories, and writes about all things sleep. A certified sleep science coach, Elisa’s tested more than 300 mattresses and 150 sleep accessories, and her sleep tips have appeared in Readers Digest, Homes and Gardens, and 21 Oak.

Elisa earned a M.A in Mass Communication from Texas State University and a B.F.A in Acting from Oklahoma City University. While earning her master’s degree, Elisa wrote an extensive case study about bed-in-a-box brands and discovered a newfound excitement for the mattress industry. With so many options available, purchasing a mattress can feel daunting. Elisa is passionate about helping people find the best bed for them.

Before joining the Mattress Clarity team, Elisa wrote about Austin’s best restaurants and attractions for Only In Your State. She is also an avid music-lover and has covered the Austin City Limits music festival for Glide magazine and Speakers In Code.

When she isn’t testing memory foam or writing about innersprings, Elisa can be heard singing nostalgic hits with her national party band, Saved By The ‘90s. She also performs with Austin-based arts collective New Manifest Theatre Company.

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