Vitamin d

Vitamin D supports bone health, but supplementation may impact your body’s natural production.

Strong consensus

For vitamin d optimization.

Sourced from the doctors, PhDs and clinicians behind Entrain. Updated

The strongest voice

“adequate levels of vitamin d uh vitamin k2 magnesium and ironically sodium also because if people are deficient in sodium we will pull sodium out of the bones and when we pull the sodium out of the bones we also pull calcium with it”

a former research biochemist · source video

In their own words

One faithful sentence per source, linked to the moment it was said; quiet chips mark where money is involved.

a licensed acupuncturist and clinician-educator conditional
“Considered helpful in immune regulation for long COVID patients.”

a licensed acupuncturist and clinician-educator · source video · 00:07:00

a clinical nutritionist against
“Vitamin D levels naturally drop in winter due to lack of UVB sunlight, so supplementation to maintain high levels all winter is unnecessary and artificial.”

a clinical nutritionist · source video · 00:18:45

Worth discussing with your GP, especially if you take medication or are pregnant. Entrain describes what is publicly taught; it does not prescribe.

The research our sources reach for

Peer-reviewed papers cited alongside this verdict, linked straight to PubMed.

On 5 September 2026, 340 studies in the library were compared by identifier with 72,389 Retraction Watch entries. No matching notices were found. This check does not establish study quality or validate a health claim.

Methylated b vitamins

Methylated B vitamins can be especially helpful for those with methylation pathway issues.

Strong consensus

“some people take methylated B vitamins to prevent a hangover ... something else which is very gentle and not going to cause any problems will be try methyl glycine or it's called TMG”

a molecular biology PhD · TikTok video

Grass-fed beef

Grass-fed beef offers better nutrition and supports soil and animal health.

Strong consensus

“grass-fed beef insane but how they do the research they take 100 head they put 50 on grain leave 50 on on grass when the ones on grain get fat they kill them all guess what the ones that grass are not as fat or lean”

a licensed acupuncturist and clinician-educator · source video · 00:14:32

Water filtration

Filtering water is a simple way to reduce exposure to unwanted substances.

Strong consensus

“water needs to be filtered and remember in order to filter toxins like that out of the water we must use a reverse osmosis or a distillation type filter”

a clinical nutritionist · source video · 00:06:00