Having enough D3 in your system works too, you either don't even catch anything or if you do it's mild (in the beginning of the covid hysteria that was even noted in a few articles - 80 % of people who ended in hospitals had low D3 values in their blood - but for some reason that didn't lead to recommendations of taking D3 as a preventive method... I wonder why).
But especially if you take it as pills (like me, who lives far north, no chance of enough sunlight during winter) you need to also make sure you get K2, if you get lots of D3 but not enough K2 you may get hardening arteries as those two work together, and when they do they direct calcium to your bones, but if you don't get enough K2 it goes elsewhere.
In foods D3 is in fatty fish, rainbow trout, salmon, and sardines, and in eggs and beef liver, but since the amounts also depend on what the animal ate especially eggs aren't necessarily that reliable a source these days.
K2 even less so from foods, eggs, the yolk part, sauerkraut, butter, chicken liver, blue cheese, Gouda, kefir, and natto, but it seems to depend even more on what the animal ate so unless it's something fermented no guarantees these days. But fermentation creates K2 so if you will eat something like sauerkraut regularly you may get enough from that. I kind of prefer pills.
Having enough D3 in your system works too, you either don't even catch anything or if you do it's mild (in the beginning of the covid hysteria that was even noted in a few articles - 80 % of people who ended in hospitals had low D3 values in their blood, - but for some reason that didn't lead to recommendations of taking D3 as a preventive method... I wonder why).
But especially if you take it as pills (like me, who lives far north, no chance of enough sunlight during winter) you need to also make sure you get K2, if you get lots of D3 but not enough K2 you may get hardening arteries as those two work together, and when they do they direct calcium to your bones, but if you don't get enough K2 it goes elsewhere.
In foods D3 is in fatty fish, rainbow trout, salmon, and sardines, and in eggs and beef liver, but since the amounts also depend on what the animal ate especially eggs aren't necessarily that reliable a source these days.
K2 even less so from foods, eggs, the yolk part, sauerkraut, butter, chicken liver, blue cheese, Gouda, kefir, and natto, but it seems to depend even more on what the animal ate so unless it's something fermented no guarantees these days. But fermentation creates K2 so if you will eat something like sauerkraut regularly you may get enough from that. I kind of prefer pills.
Having enough D3 in your system works too, you either don't even catch anything or if you do it's mild. But especially if you take it as pills (like me, who lives far north, no chance of enough sunlight during winter) you need to also make sure you get K2, if you get lots of D3 but not enough K2 you may get hardening arteries as those two work together, and when they do they direct calcium to your bones.
In foods D3 is in fatty fish, rainbow trout, salmon, and sardines, and in eggs and beef liver, but since the amounts also depend on what the animal ate especially eggs aren't necessarily that reliable a source these days.
K2 even less so from foods, eggs, the yolk part, sauerkraut, butter, chicken liver, blue cheese, Gouda, kefir, and natto, but it seems to depend even more on what the animal ate so unless it's something fermented no guarantees.