[waterhouse]

Well, is it wrong?

And programmers seem more likely to spend their time indoors, and therefore more likely to be vitamin-D-deficient without supplementation.

[incrudible]

I was tested severely deficient. Didn't have any obvious symptoms either.

[boomboomsubban]

The main problem of a vitamin D deficiency is poor bone and muscle health, not something that would usually cause obvious symptoms.

[SOLAR_FIELDS]

One of the hallmarks is lower back pain. If you get this frequently for no explicable reason you should be looking to get your levels tested.

[shock]

Sleeping well? Were you waking up refreshed in the morning?

[epicureanideal]

A lot of programmers don't sleep well regardless of their vitamin d intake. Late work, blue light all day, not enough exercise, stress, etc.

[incrudible]

Not exactly. However, I've been taking Vitamin D for a while now and I can't say that feel "more refreshed".

[shock]

I would guess that it depends on what your current vit D level is. Also, depending on your genotype you might be a fast or slow metabolizer of vit D, which would also play a role in how big of a dose you would need.

I recommend the talks/interviews by Dr. Stasha Gominak a neurologist specializing in sleep.

[dasudasu]

I have done 1000 IU for a few months with no impact on chronic insomnia.

[shitgoose]

The recommendation is 5,000 to 10,000 iu. 1,000 is what the label on the bottle says.

[dasudasu]

According to whom? NIH says 600 IU for a normal adult (https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessiona...) and recommends a maximum daily intake of 4000 IU (https://ods.od.nih.gov/factsheets/VitaminD-Consumer/).

[SOLAR_FIELDS]

My doctor specifically prescribes 5000 IU as a maintenance dose and 15000 IU to people severely deficient. These are numbers he got from treating hundreds of deficient patients and testing his patients blood levels every 6 months. I imagine a lot less is needed if you are in the sun for a good portion of the day every day but for most of us who spend a decent amount of time inside it seems to be what’s necessary.

[kpfleger]

Did you read the open letter (original link of thread)? There is an entire paragraph and footnote with 2 refs talking about the problem with the current government guidelines.

[throwaway201103]

I've been doing 4,000 iu/day of Vitamin D since March, also supplementing Zinc and C, and taking a standard multivitamin. My entire household got COVID in November and I never became symptomatic.