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A comment on Vitamin D3 During Pregnancy and Cognitive Performance at 10 Years. Parent comment

Re:Vitamin D3 During Pregnancy and Cognitive Performance at ... by dheera on Sunday June 07, 2026 @01:24PM (#48436885)
I don't think it invalidates a study as long as you do things on relative terms and have a control group. Another study can see if the same delta effect is reproducible in an e.g. homogeneous Asian population and report on it.

It is probably a logistical nightmare to do a study of this sort in multiple countries and regulatory systems simultaneously.

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Re:Vitamin D3 During Pregnancy and Cognitive Performance at ... by wrsh07 on Sunday June 07, 2026 @01:28PM (#48436924)
It doesn't invalidate the study at all! On the contrary, if you're measuring vitamin d levels from blood tests, it is easy to adjust the dosage to match.

It's just an important factor - if you live much further south or spend a lot of time outdoors, your target dosage will be different than someone in _Denmark_.

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