Back to How I Healed Graves’ Disease Naturally | My Exact
Claim
Strong Opposition
quantitative
Analysis v3

When vitamin D is given by injection, more of it enters the bloodstream compared to when it is taken by mouth.

0
Pro
54
Against

Mechanism

Synthesis from 1 study

How it works

Vitamin D taken by mouth gets absorbed straight from the gut into the liver, where it is turned into its active form and released into the blood at higher levels. When injected into muscle, it enters the blood more slowly and less efficiently, resulting in lower overall levels.

Most probable mechanism

In Simple Terms

When vitamin D is taken by mouth, it is absorbed directly from the gut into the bloodstream and carried to the liver, where it is converted into its active form. This form then circulates in the blood at higher levels than when vitamin D is injected into muscle, because the injection route delays absorption and reduces the efficiency of conversion.

Causal chain
1

Vitamin D3 is absorbed from the gastrointestinal tract into the portal circulation after oral administration

Verified by multiple studies
which leads to
2

Absorbed vitamin D3 is transported directly to the liver via the hepatic portal vein

Verified by multiple studies
which leads to
3

Hepatic 25-hydroxylase enzymes convert vitamin D3 into 25-hydroxyvitamin D3, the primary circulating form

Verified by multiple studies
which leads to
4

25-hydroxyvitamin D3 enters systemic circulation at higher concentrations when derived from oral intake compared to intramuscular injection

Verified by multiple studies

Evidence from Studies

Supporting (0)

0

Community contributions welcome

No supporting evidence found

Contradicting (1)

54

Community contributions welcome

54

Comparison of the Effect of Oral Versus Parenteral Vitamin D on Serum Levels of Vitamin D in Premature Infants with Vitamin D Deficiency

Randomized Controlled Trial
Human

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Sign up to see full verdict

Similar Assertions

Before treatment began, people given vitamin D by mouth had the same average blood levels of vitamin D as people given vitamin D by injection.

54
0
76%

If your pancreas isn't making enough digestive juices, taking vitamin D pills won't help because your body can't absorb the vitamin properly—it needs fat to soak it up, and your pancreas isn't helping with that.

29
0
74%

In premature infants with low vitamin D, taking 1,000 IU of vitamin D3 by mouth every day for 15 days leads to higher blood levels of vitamin D than receiving one 15,000 IU injection, even when starting from the same low level.

54
0
74%

In people with type 2 diabetes and early kidney disease, those with higher levels of vitamin D-binding protein in their blood at the start of treatment are less likely to reach healthy vitamin D levels after three months of taking vitamin D supplements.

61
0
70%

Related Content