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Fewer cognitive problems if more sun or Vitamin D

Grassroots Health May 2019

Reporting on: Effect of sun exposure on cognitive function among elderly individuals in Northeast China


Cognitive impairment is often a gradual, long-term process that affects many older individuals. In October 2018, results from a study assessing the association between sun exposure and cognitive function were published in the journal Clinical Interventions in Aging. In this study, 1192 participants aged 60 years and older and residing in rural China provided information about their long-term sun exposure behaviors including time of day when outdoors, duration outdoors, and use of sun protection. The research team used the Mini-Mental State Examination (MMSE; maximum score of 30) to assess participant's orientation, memory, language, calculation, and attention.

What were the findings of the study?
As shown in the chart below, the research team found that participants in the high sun exposure group had a higher average MMSE score of cognitive function compared to participants in the medium or low exposure groups (P<0.05). Additionally, those with high sun exposure were more likely to have better cognitive function than those with low sun exposure (P=0.004) after adjusting for dietary intake of vitamin D, vitamin D supplement use and other factors such as age, sex, BMI, and education.

While the most effective time for vitamin D synthesis is mid-day, all three sun exposure groups had relatively low mid-day (11:00 am - 1:00 pm) exposure. The high- and medium- exposure groups spent more time outdoors in the surrounding hours of the morning (8:00 - 11:00 am) and afternoon (1:00 - 4:00 pm) whereas the low-exposure group tended to spend time outdoors during early morning (6:00 - 8:00 am) and late afternoon (4:00 - 6:00 pm).

This study shows that long-term high sun exposure throughout life could reduce the risk of cognitive impairment in the later years of life.

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Overview Alzheimer's-Cognition and Vitamin D starts with

VitaminDWiki: Cognition and Vitamin D

Cognitive category starts with the following
Very brief summary of Cognitive decline
Treatment : Vitamin D intervention slows or stops progression
Prevention : Many observational studies - perhaps Vitamin D prevents
Omega-3 both prevents and treats cognition
Wonder the benefits if both Vitamin D AND Omega-3 were to be used
Dementia page - 50 items

370 items in Cognition category

see also Overview Alzheimer's-Cognition and Vitamin D
Overview Parkinson's and Vitamin D

Studies in both categories of Cognition and:
Cardiovascular (7 studies), Genetics (9 studies), Vitamin D Receptor (16 studies), Omega-3 (49 studies), Intervention (19 studies), Meta-analyses (22 studies), Depression (23 studies), Parkinson's (22 studies)
Click here for details

Poor cognition 26 percent more likely if low Vitamin D (29 studies) – meta-analysis July 2017
Every schizophrenia measure was improved when vitamin D levels were normalized – June 2021
Cognitive Impairment and Dementia often associated with low Vitamin D – April 2020
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VitaminDWiki: Cognition Meta-analysis

Created by admin. Last Modification: Wednesday May 15, 2019 13:25:28 GMT-0000 by admin. (Version 7)

Attached files

ID Name Comment Uploaded Size Downloads
11962 Cognitive China.jpg admin 15 May, 2019 32.84 Kb 565
11961 Effect of sun exposure on cognitive function .pdf admin 15 May, 2019 402.78 Kb 546