Happy's Vitality and sleep health Articles
Expert information and articles — Happy

How Does Happy Evaluate Overseas Melatonin Products?
You need to check melatonin content, NSF/USP/cGMP certification status, convenience of melatonin dosage adjustment, flavorings, presence of unnecessary ingredients, and excessive sugar content.
- Melatonin
- Sleep
- International direct purchase
- Evaluation criteria
- Happy
17675 min read
How Does Happy Evaluate Domestic Melatonin Products?
You should consider the safety and credibility of raw materials, whether manufacturers have HACCP/ISO certification, test reports for melatonin content in finished products, and the clarity of melatonin content per tablet.
- Melatonin
- Sleep
- Evaluation criteria
- Domestic
- Happy
011434 min read
Is It Safe to Take Melatonin Purchased from Overseas Direct Shopping?
While overseas melatonin offers good variety, you should be careful when purchasing foreign products. In particular, a 2017 study revealed that many overseas melatonin products have different actual melatonin content than the amount indicated on the product label.
- Melatonin
- International direct purchase
- Happy
09523 min read
What Are These Ingredients in Melatonin Products? - Tryptophan, Theanine, and More
Substances such as tryptophan, vitamin B6, magnesium, and vitamin B12 are used as raw materials in the melatonin synthesis process.
- Melatonin
- Sleep
- Tryptophan
- L-theanine
05925 min read
Before You Start Taking Melatonin, Read This Article.
The most common plant-based melatonin products sold on the market contain 2mg of melatonin, and various dosages are available. Also, since melatonin is a hormone related to circadian rhythm, the time of administration is important. What dosage and timing of melatonin would be right for you?
- Expert
- Melatonin
- Insomnia
- Aging
- Sleep
06414 min read
'Can't Fall Asleep' Insomnia, Let's Focus on Melatonin.
Melatonin is a hormone released from a part of our brain called the 'pineal gland.' This hormone is released when light signals to the eyes decrease, and it helps us fall asleep.
- Melatonin
- Plant
- Insomnia
- Happy
13675 min read