Published on January 5, 2026
CONGRATULATIONS TO OUR VITAMIN D SCIENTISTS!
A vitamin D paper published in MDPI Nutrients, “Vitamin D: Evidence-Based Health Benefits and Recommendations for Population Guidelines” has been recognized as the most cited paper published in Nutrients in 2025!
Congratulations to the authors – members of GrassrootsHealth’s scientific panel:
- William B. Grant
- Sunil J. Wimalawansa
- Pawel Pludowski
- Richard Z. Cheng
This paper was inspired by our 2024 International Virtual Vitamin D Forum & Expert Panel Discussion, an event organized in response to the latest update in vitamin D guidelines by the Endocrine Society, with the goal of clearing up increasing confusion about vitamin D and conclusions made from vitamin D research. You can view a recordings of the forum and its featured presentations here.
According to Dr. William Grant, the paper is also
“the highest-cited vitamin D paper published in 2025 according to Google Scholar with 95 citations. The next highest one has 57 citations. That should also make it the highest-cited paper in 2025 according to SCOPUS.”
What an impact this paper is making!
“This recognition is not merely an acknowledgment of a single publication, but a validation of the broader path of evidence-based nutritional medicine, orthomolecular medicine, and systems-level approaches to health. I am grateful to my co-authors and to the global scientific community for the continued citations, scrutiny, and discussion,”
said Dr. Richard Cheng in a recent Substack regarding the paper’s special recognition.
Read the paper in Nutrients here and join us tomorrow with Dr. Michael Holick as he touches on this topic and more for our next Vitamin D Study Hour.
How Are Your Levels of Vitamin D and Other Important Nutrients?
Check your vitamin D, omega-3s, magnesium, and other important markers today as part of the vitamin D*action project!
Measure your:
- Vitamin D
- Magnesium PLUS Elements (including zinc, copper, selenium, mercury, cadmium and lead)
- Omega-3 Fatty Acids
- hsCRP (for Inflammation)
- HbA1c (for Blood Sugar)
- and more
Did you know that each of the above can be measured at home using a simple blood spot test? As part of our ongoing research project, you can order your home blood spot test kit to get your levels, followed by education and steps to take to help you reach your optimal target levels. Start by enrolling and ordering your kit to measure each of the above important markers, and make sure you are getting enough of each to support better health and wellbeing!
Start Here to Measure Your Levels
How Can You Use this Information for YOUR Health?
Having and maintaining healthy vitamin D and other nutrient levels can help improve your health now and for your future. Measuring is the only way to make sure you are getting enough!
STEP 1 Order your at-home blood spot test kit to measure vitamin D and other nutrients of concern to you, such as omega-3s, magnesium, essential and toxic elements (zinc, copper, selenium, lead, cadmium, mercury); include hsCRP as a marker of inflammation or HbA1c for blood sugar health
STEP 2 Answer the online questionnaire as part of the GrassrootsHealth study
STEP 3 Using our educational materials and tools (such as our dose calculators), assess your results to determine if you are in your desired target range or if actions should be taken to get there
STEP 4 After 3-6 months of implementing your changes, re-test to see if you have achieved your target level(s)
