The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
I personally take 5,000 IUs a day as well, and my levels really hover around 50 nanograms per mill. I don't put sunscreen on all the time. I do put it on my face and I wear a hat, but some of my skin is being exposed, so I do make it from the sun as well.
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I personally try to keep my blood level @ 50ng/ml.
I take 4,000 IU/day and get little sun & take K2.
I usually take 4,000 IU but sometimes I take 2,000 depending on sun exposure. My blood levels hover around 50ng/ml.
I also take vitacost 2,000 IU D3 capsules.
I take synergy once daily because it has 2,000 IU D3 in one pill.
I take 4,000 IU/day but do not get much sun.
IMO, these thresholds aren't high enough. I typically recommend levels between 40-60 ng/mL (100-150 nmol/L) for optimal health and reduced risk of chronic disease.
I take 4000 IU/day (get so sun).
personally, my levels are around 50 ng/mL (I take 5,000 IU per day).
I personally take 4,000 IU a day and my levels um range between 50 to 54 nanograms per Mill which is considered adequate
I personally take 4,000 IUS a day and I get my measure my vitamin D levels measured um ideally quarterly and my levels hover around 50 nanograms per mil
I currently supplement with 4,000 IU's per day and my levels are consistently 50 nanograms per milliliter I do not have any vitamin D related snips known to hamper the production of vitamin D steroid hormone