I would appreciate comments/tips regarding iron supplementation increasing cholesterol and the problems with supplementing vit d3 without vit k
Iron and cholesterol
‘Your body needs iron for the production of hemoglobin, the specialized protein that gives red blood cells their red color. Hemoglobin carries oxygen in the blood, making it vital to the function of all cells. A high level of iron in the blood can provoke the production of bioactive iron, which can promote oxidative stress. Oxidative stress contributes to atherosclerosis, a condition exacerbated by high cholesterol. In contrast, an iron deficiency does not contribute to cardiovascular problems, but the resulting medical condition of iron-deficiency anemia also causes symptoms.’
Vit D3 without Vit K
How do Vitamin D and calcium work together in our bodies?
Calcium and vitamin D work together to protect your bones—calcium helps build and maintain bones, while vitamin D helps your body effectively absorb calcium. So even if you're taking in enough calcium, it could be going to waste if you're deficient in vitamin D.
The role of vitamin D and its derivatives in vascular calcification is complex. It has long been known that in humans, hypervitaminosis D may be associated with extensive arterial calcium phosphate deposits, mostly in the form of apatite crystals. In experimental animals, the administration of pharmacological doses of vitamin D sterols can lead to widespread arterial calcification, especially in association with favourable conditions such as atherosclerosis, diabetes and chronic kidney disease (CKD) [1–5].
The mechanisms by which high doses of vitamin D or its derivatives induce vascular calcification include an increase in serum calcium and phosphate, the formation of fetuin-A mineral complexes in association with a decrease in free serum levels of fetuin-A  and the local induction of osteochondrogenic programmes with transformation of vascular smooth muscle cells (VSMCs) into osteoblast-like cells .