I can talk endlessly about the benefits of vitamin D.
Only on it we experience the absence of the sun in winter in St. Petersburg.
In the darkest months, we take 5000, from January-February we wait for 4000 (2 capsules), from March-April to 2022.
Of the positive aspects: we get sick many times less often, it is easier to get up in the morning.
From a funny side effect - the tan is brighter and sticks from the first sunny days)
I consulted with a doctor, she confirmed that such a dosage in our