Vitamin D and Vitamin A
Studies indicate that Vitamin A can both harm and help Vitamin D
Excessive Vitamin A should be avoided.
See also: Vitamin A Misc
("vitamin A" OR retinol) AND "vitamin d"
PubMed Search in title or abstract 2,056 items as of Aug 2025
Bar graph: 28 papers annually in 2006 has risen to 148 papers by 2023
Vitamin A Deficiency - Wikipedia
The 20 most-visited Vitamin A pages in Vitamin D Life
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Low vitamin A is a problem with high Vitamin D only if not get enough from food - Feb 2025
Vitamin A is stored in the liver and can accumulate to toxic levels (children and >age 50)
items in vitamin A category
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See also web
Eat This Thing Everyday | Age Will Almost Stop Dr, Berg video July 2023
Evidence to Underpin Vitamin A Requirements and UpperLimits in Children Aged 0 to 48 Months: A Scoping Review - Jan 2022 📄 PDF
- fails to make any recommendation
Vitamin A Plays an Essential Role in Setting the Circadian Rhythm and Allowing Good Sleep Jan 2016
Separating fact from fiction on cod liver oil Kresser 2008
Vitamin A blocks Vitamin D Mercola 2010
Vitamin A and D intake in pregnancy, infant supplementation, and asthma development: the Norwegian Mother and Child Cohort
- "CONCLUSIONS:Excess vitamin A (≥2.5 times the recommended intake) during pregnancy was associated with increased risk,..." PDF online
- Overconsumption of vitamin A may increase bone fracture risk Oct 2018
- Mice fed Vitamin A supplements at a similar level (per body weight) to what some humans take
- "...results in decreased bone thickness and an increased fracture risk after just 1-2 weeks"
- The Importance of Real Vitamin A (Retinol) Self-Hacked May 2019