Can I give Glycine Now to a 13 year old child?

Glycine Now is intended for adults. Do not administer the preparation to a 13-year-old child.

We wrote about the properties of glycine in the article:

https://www.gdziepolek.pl/substancje/glicyna

If your child has sleep problems, I encourage you to take a look at the so-called sleep hygiene. It is worth limiting watching TV and using a phone, tablet or computer before bedtime. You can also introduce eating light meals in the evening. We wrote more about our ways to deal with sleepless nights in the article:

https://www.gdziepolek.pl/artykuly/bezsennosc

If the symptoms persist, I encourage you to consult a doctor. If necessary, you can also use teleconsultation, e.g. via the Gdziepolek.pl portal:

https://www.gdziepolek.pl/telekonsultacja/z-pediatra