Does Melatonin Make You Gain Weight?

Written by:

Obi Obadike

Obi Obadike

Celebrity Fitness & Nutrition Expert, CFT, SFN, M.S. Founder & CEO – Ethical Inc.
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Does melatonin make you gain weight? There are no link research studies wise to weight gain and melatonin supplements. There was an animal study published in February of 2018 regarding rats. It showed that melatonin reduced obesity without changing food intake. So, the study revealed that melatonin promoted a fat burning effect among rats. There are no long-term studies that have been done on humans to validate this though.

Does melatonin make you gain weight? Photo credit: iStock-MurzikNata

What is melatonin? The pineal gland in the brain makes melatonin. Melatonin is a hormone that plays a key role in the sleep cycle.  And it also lets the body know when it’s time to go to sleep and when it’s time to be awake.

Melatonin supplements are common for people that have sleep disorders. Research studies show it has value for alleviating problems in people that have issues falling or staying asleep. Research studies show that lower doses are more effective in helping with sleep than higher doses.

The best time to take melatonin is 60 to 90 minutes before bedtime. According to the Cleveland Clinic the recommended daily dose is 0.5 to 3 milligrams. Try not to take more than the recommended amount.

Some of the side effects of melatonin supplements are:

  • Dizziness
  • Drowsiness
  • Headaches
  • Nausea
  • Irritability
  • Low blood pressure
  • Abdominal cramps
  • Mild anxiety
  • Tremors

It is important to check with your doctor before taking any melatonin. It can interact with most medications such as contraceptives, seizure, diabetes and blood clotting drugs and immune system suppressants.

Some of things you can do to help you sleep better is make the temperature between 65 and 72 degrees which is ideal sleep conditions. And this information is according to the National Sleep Foundation. Also make sure the room is dark and there is no bright light leaking into the room.

Melatonin can be purchased without a doctor’s prescription, but it does not mean that everybody must take it that has sleep issues. If you have high blood pressure it is recommended that you don’t take melatonin as it may possibly raise your blood pressure levels. And this can be dangerous with people that have high blood pressure whose goal is to regulate their levels. Just be mindful and cognizant of that.

Melatonin supplements come in two forms as they come in the natural and synthetic form. The natural form is produced by animals and the synthetic form is made in a laboratory. The American Family of Physicians states that the FDA doesn’t guarantee the purity, efficacy, and safety of any melatonin dietary supplement that you buy on the market shelf. So, you are essentially on your own when you buy any melatonin supplement.

“There are no link research studies wise to weight gain and melatonin supplements.” Celebrity Fitness & Nutrition Expert Obi Obadike

The Bottom Line is there are no research studies that link weight gain to consuming a melatonin supplement. But melatonin can help with people that have sleep disorders or insomnia issues.

It is just important if you do it to stay within the recommended daily dose of 0.5 to 3 milligrams.

If you have any interest in trying any of our Ethical Supplement products to help you heighten your immune system or assist you with your fitness, weight loss or health goals. You can get a discount below at this link. ?utm_source=blog 


  1. National Sleep Foundation-
  2. Pineal Research-
  3. American Academy Of Family Physicians-
  4. Cleveland Clinic-
  5. Mayo Clinic-

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