Hey there - It’s Hanna from the science team at First Day.
I just wanted to reach out because of the recent study that has been making waves in the science world - and it’s something every parent should know.
It was published this week by the American Heart Association and looked at over 130,000 people who took melatonin every night.
What the study found was quite concerning –
People who used melatonin long-term had a higher risk of heart problems – including fast heart rate, more hospital visits, and even shorter lifespans. [1]
This is important because so many families use melatonin every night, thinking it’s safe.
But here’s the truth: melatonin is a hormone.
And when you give your child a hormone night after night, it can mess with how their body and brain grow.
That’s why we’ve never used melatonin in any of our products.
Instead, we made something that helps the body relax naturally – without hormones, side effects, or next-day grogginess.
It’s called Calming Magnesium, and it’s made with:
- Magnesium citrate: to help calm nerves and reduce stress
- L-theanine: a gentle nutrient that supports better sleep and mood
- No hormones. No sugar. No junk.
It supports the body’s own melatonin production – instead of replacing it.
And it’s already helping thousands of families get better sleep, the natural way.
If you’ve been using melatonin, or just want a cleaner option, this is for you.
>> Click here to try Calming Magnesium and get 36% OFF when you subscribe with code SUBANDSAVE
To safer, more restful nights,
Hanna
Scientific & Research Team
www.firstday.com
[1] “Long-term use of melatonin supplements to support sleep may have negative health effects,” American Heart Association Scientific Sessions 2025, Abstract MP2306.