Vitamin D has always been considered a safe dietary supplement. But it is fat soluble. This means that the vitamin can accumulate. There was a suspicion that it would not end well, but it could not be confirmed.
Every time someone was prescribed a decent amount of the vitamin, there were doubts if the patient had already eaten some other supplements. Now even food manufacturers mix vitamin D into their products like in feed for chickens at a poultry farm.
We've always known that extra vitamin D will increase blood calcium levels too much. From this, kidney stones can appear, and even worse.
Our liver chews vitamin D into intermediate 25 (OH) D, which then goes to the kidneys for final polishing.
When they began to do an analysis for 25 (OH) D in the blood at every step and find its level more than 40 - 50 nanograms per milliliter, then slowly began to surface stories about some cases of falling people, the appearance of pancreatic cancer, mortality.
These reports were so vague that they still don't know which level of 25 (OH) D is safe. But it is already known for sure that kidney stones are not the worst side effect.
Everything is aggravated by concomitant diseases. Sometimes a person's pancreas does not work, and the intestines are sick. Fat is poorly absorbed, and fat-soluble vitamins are simply released in transit.
It is clear that such people will be fooled, well, just a lot of vitamin D, and then they will hope that at least something will be absorbed. That is, doctors have to manipulate gigantic amounts of the vitamin. Therefore, they are afraid.
The upper safe limit for vitamin D in the blood has not been rigidly defined, but it is believed that increasing 25 (OH) D more than 50 nanograms per milliliter is already harmful.
On my own behalf
Personally, I was stunned by the conversations that had begun about the fact that there is never too much vitamin D from the sunlight. Like even if you live on the street, the analysis will still be less than 80 nanograms per milliliter. All excess is safely processed directly in the skin.
And there is also an opinion that if the fat is almost not absorbed, then it is better not to bother with toxic additives, but to go under an ultraviolet lamp. Previously, they were afraid to talk about it. Skin cancer and all. Now the attitude is slowly changing.
Are you already concerned about the 25 (OH) D level?
