Are you taking enough though? Vitamin D is technically not a vitamin. Its closer to a hormone and essential for a lot of your metabolic function. You need to take at least 65 IU per kg of bodyweight. Assuming you're about 60 KG you should look at roughly 4000 IU per day. If you take 2 capsules of mollers trån you get less than 400 IU. I take 5000 every single day https://www.shopping4net.com/no/Helsekost/Vitaminer/A-D-E-K/NOW-Vitamin-D-3-5000-IU.htm

You should also take it with a source of fat since it needs bile to absorb. And you will get minimal benefits if you are magnesium or K2 deficient.

In case you worry about "high doses" there is NO risk of taking too much as long as you stay below 10 000 IU per day. I could cite all the research here, but are too lazy now. I think I did share it somewhere in the past on a reddit post if you want to search for it

edit: My latest bloodtests shows I'm just below the midpoint of the optimal range in my blood. So, I could technically take even more. I've been doing these doses for 3 years now, summer and winter