How long after taking Glucophage can selenium be used?

To the best of my knowledge, there are currently no clues or data regarding possible interactions of metformin with selenium. For this reason, I would recommend a 2-hour interval, although theoretically there is no data on possible interactions. It is worth including, m.in nuts (e.g. Brazilian) and fish (e.g. tuna, salmon) in your diet. Before supplementing selenium, it is worth checking its level in the body, it is not recommended to supplement "in the dark". Excess selenium is just as harmful as its deficiency. When it comes to selenium dosage, there is no simple answer. Most often, it is recommended to use between 50 mcg and 100 mcg of selenium per day for preventive purposes. You may also see a dosage of 200 mcg per day in patients with Hashimoto's. In practice, much depends on whether and what selenium deficiency has been found. Below are examples of selenium preparations available in pharmacies: https://www.gdziepolek.pl/produkty/69982/walmark-selen-organiczny-tabletki/apteki#internetowe https://www.gdziepolek.pl/produkty/96123/naturell-selen-organiczny-200-tabletki/apteki#internetowe https://www.gdziepolek.pl/atc/A12CE/preparaty-selenu