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Vitamin D3 is better than D2.  Vitamin D3 replacement raised 25(OH)D, whereas vitamin D2 caused a decline in levels.

Vitamin D3 is more potent (87%) and just a better form than is vitamin D2.

This study is misleading.  Their conclusion is that D2 and D3 are equivalent in raising 25-OH vitamin D via po form preferentially over the IM form. However, when you look at the results, the response of D3 was statistically significant over that of D2.  That is the conclusion: vitamin D3 is the optimal form of vitamin D.

Vitamin D3 87% more potent than D2; D3 should be the treatment for vitamin d deficiency

Vitamin D3 is more potent and longer acting than vitamin D2

low Brain dopamine D2 receptors found to be inversely associated with BMI. 

6% relative risk reduction in mortality with vitamin D3 vs. 2% relative risk increase with vitamin D2.

review of study that analyzed 94,000 people on vitamin D3 and D2.

Vitamin D3 better absorbed than D2: and should be the preferential treatment in vitamin D deficiency

vitamin D3 shown to be 87% more potent than vitamn D2

study points to a modest decrease in dopamine and serotonin production in heroic users.  There appears to be a decrease in dopamine production, which could be via a down regulation of tyrosine hydroxylase enzyme and thus release.  Decreased homovanillate also noted.  Other studies have pointed to a decrease/downregulation of D2/D3 receptors.

Anything and everything one would want to know regarding thyroid hormone signaling.  Doctors, especially endocrinologists, need to read this.  T4 is not or is ever inside target cells.  The enzymes, deiodinase types 1, 2, and 3, are what control the thyroid hormone at the cellular levels.  Deiodinase-2 is what generates T3 in the cytosol of the cell.  In contrast, deiodinase-3 is what generates rT3 which is inactive.  High Fat diet increases deiodinase-3.

Oxidative stress/inflammation via HIF-1alpha increase D3 which increases rT3 to increase proliferation in cancer; in contrast, there is a decrease in D1 and D2 to decrease T3 and T4. The question is the systemic versus the TME.

vitamin C shown to interact with dopamine receptors and decrease food intake.

Long term high dose Vitamin D proven to be effective.  No toxicity.

Good review of meds for nausea.