1. Hi Alex,
    Thank you for sharing this amazing information with us. I have just read your entire post and damn, there are so many things that I had no idea about!

    I have just realized that I might have a Vitamin D deficiency, by the way, which I am not happy about haha.

    I didn’t know that UVB can not penetrate glass, and my problem is that in the last couple of months I didn’t put accent on sun exposure. And…I don’t really like fish either, which, again, leads me to a major problem.

    One thing that indicates me that I might suffer from Vitamin D deficiency is that I kind of find myself fatigued lately. I will definitely consider your advice and I will bookmark your website as well.

    Great information, thank you!

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