Good morning, I am a woman of 27 years I suffer from a lack of strength, constantly u...

First of all, you should take care of a healthy diet and regular physical activity. Perhaps it will be helpful to reduce the supply of sugar in the diet. It is also worth consulting a family doctor and performing basic diagnostic tests, such as m.in morphology, fasting glucose level, thyroid hormone concentration. It is worth noting that weight gain and fatigue, drowsiness, etc. are a symptom of diseases such as thyroid disease or diabetes. That is why diagnostics is so important, and only when all test results are normal, supplementation can be considered. I attach links to helpful entries: https://www.gdziepolek.pl/kategorie/leki-na-niedoczynnosc-tarczycy https://www.gdziepolek.pl/kategorie/leki-na-cukrzyce