u/Locksmith-10

Researchers screened older adults and people with darker skin tones in northern Britain for vitamin D levels across the year. More than half of older adults and over 70% of ethnic minority adults had insufficient or deficient vitamin D. Summer sunshine did not fix the problem. Sun exposure alone seems to fall short for these groups at higher latitudes.

This study suggests again that sunlight alone may not maintain vitamin D levels in older or darker-skinned adults at northern latitudes.

Conflict of Interest Disclosure: Study funded by supplement company BetterYou, though the company was not involved in design or analysis.

Study: https://www.nature.com/articles/s41430-026-01760-z

Researchers screened older adults and people with darker skin tones in northern Britain for vitamin D levels across the year. More than half of older adults and over 70% of ethnic minority adults had insufficient or deficient vitamin D. Summer sunshine did not fix the problem. Sun exposure alone seems to fall short for these groups at higher latitudes.

This study suggests again that sunlight alone may not maintain vitamin D levels in older or darker-skinned adults at northern latitudes.

Conflict of Interest Disclosure: Study funded by supplement company BetterYou, though the company was not involved in design or analysis.

Study: https://www.nature.com/articles/s41430-026-01760-z

Authors received funding from NIH, VA Medical Center, and a reproductive longevity consortium. No commercial conflicts declared.

They're not perfect, even here its fair to point out that the line spacing on page 2 is too wide, but tightening it would make the key takeaway harder to catch at a glance. I will try to make it better in the future.

Thanks for the positive private messages :) I will look for more supplements studies in the future

For those of you who've been on NMN/NR for 6+ months, is this changing something for you?

I will continue taking NR tbh.