Vitamin D levels over 150 nanograms associated with somewhat lower haemoglobin, etc (details behind paywall)

The effect of hypervitaminosis D and intoxication on haematological parameters hemogram parameters in patients with very high vitamin D levels

Minerva Endocrinol (Torino) . 2021 Nov 26. doi: 10.23736/S2724-6507.21.03614-9

Adnan Batman 1, Rafiye Ciftciler 2

Background: This study aims to compare the haematological parameters of patients with very high and normal 25-hydroxyvitamin-D3 (25(OH)D3) levels.

Methods: This study was designed as a retrospective cross-sectional study. The patients were divided into three groups according to their 25(OH)D3 levels: groups 1, 2, and 3 are patients with normal 25(OH)D3 levels (30-88 ng/mL), hypervitaminosis D (89-149 ng/mL) and vitamin D intoxication (>150 ng/mL), respectively. According to vitamin D levels, statistical analysis was performed by comparing the biochemical and haematological data between the groups.

Results: This study evaluated 120 patients (40 patients) in three equal groups. A statistically significant difference was found between the three groups in haemoglobin (p = 0.03), haematocrit (p = 0.01), red blood cell levels (p = 0.03), leukocyte count (p < 0.001), neutrophil count (p < 0.001), lymphocyte count (p = 0.006), mean platelet volume (p = 0.04), and neutrophil/lymphocyte ratio (p = 0.03).

In post hoc analysis,

• haemoglobin,

• haematocrit and

• RBC

were significantly higher in group 1 than in group 3 (post hoc Tukey, p < 0.05). A statistically significant negative correlation was noted between 25(OH)D3 level and haemoglobin (r = -0.236), haemotocrit (r = -0.230), and red blood cell (r = -0.265) levels.

Conclusions: Vitamin D intoxication has been observed to affect haemoglobin, haematocrit, and RBC levels negatively. However, more studies are needed to clarify the effects and mechanisms of high vitamin D levels on the haematopoietic system.

When Vitamin D levels are >150 ng, Iron might be needed

The founder of Vitamin D Life has had Vitamin D level >200 ng since 2018
has adjusted cofactors, and is taking 1 Iron pill a week
    2021 blood work was all in a normal range (except for the Vitamin D level)

Anemia is assocated with both very low and very high vitamin D (Mexican seniors) – Oct 2021

Vitamin D Cofactors in a nutshell table show the importance of each

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