mproved Quality of Life – answering such question as
- "During the past four weeks, how much did pain interfere with your normal work?"
- "How much time during the past four weeks have you felt downhearted and depressed?”
- Overall, black Adventist study participants reported better physical and mental quality of life than the U.S. norm,
- in some cases by as much as 4.5 percentage points.
- "This difference is particularly pronounced in older age groups, who progressively demonstrate
- increased mental health—lower depression,
- more energy,
- feeling more calm and peaceful, etc. - relative to the general population.
graphics are in PDF file attached to the bottom of this page
A comment by them "In this study, there was nothing that linked any one nutrient with increased quality of life. There were certain lifestyle behaviors such as not drinking/not smoking/eating a vegetarian diet/church attendance that researchers believed could explain this increased mental/physical quality of life. But vitamin D was not on the list. "
A portion of the improvement in Physical and Mental Quality of life for the Blacks could be due to increased vitamin D
in June 2008 the Adventist Church recommended 20 minutes a day of sun
- “Where possible, exposure of a large area of the body to some 20 minutes of midday sunshine would be the natural way of getting vitamin D; this being impractical for most, supplementation is recommended”
They also have a piece: Vegetarians and Vitamin D
Vitamin D is an important hormone in the prevention of osteoporosis and rickets but beyond that has major functions in the prevention of heart disease, cancers, diabetes and in the regulation of the immune system. Foods naturally rich in vitamin D are all from animal sources: cod liver oil, finfish, and shellfish. The only naturally occurring plant sources of vitamin D are certain mushrooms, in which it is present in only small amounts. There has been concern that vegetarians would have lower blood levels of vitamin D than non-vegetarians.
AHS-2 looked at the vitamin D status of vegetarians, partial vegetarians and non-vegetarians. The results demonstrated that a vegetarian diet was not associated with lower levels of vitamin D. Other factors, such as vitamin D supplementation, degree of skin pigmentation, and amount and intensity of sun exposure had a greater influence on vitamin D levels in blood than diet.
Of the factors mentioned above, degree of skin pigmentation caused the greatest difference in vitamin D concentrations. Regardless of dietary preferences, the percentage of subjects with deficiencies was much higher among Blacks (75.4%) than among Whites (47.5%). This was shown even though other areas, such as vitamin D intake and amount of exposure to the sun, were equal. The reason cited for this outcome is that, when exposed to sufficiently strong sunshine, lighter-skinned persons’ skin can produce relatively high amounts of vitamin D in a relatively short amount of time. Nevertheless, Black subjects generally have good bone health. Whether lower blood vitamin D levels affect other aspects of their health is not yet clear.
Determinants of serum 25 hydroxyvitamin D levels in a nationwide cohort of blacks and non-Hispanic whites.
Cancer Causes Control. 2010 Apr;21(4):501-11. Epub 2009 Dec 11.
Chan J, Jaceldo-Siegl K, Fraser GE.
Department of Epidemiology and Biostatistics, School of Public Health, Loma Linda University, 24785 Stewart St, Loma Linda, CA 92350, USA.
To develop algorithms predicting serum 25 hydroxyvitamin D s25(OH)D for a large epidemiological study whose subjects come from large geographic areas, are racially diverse and have a wide range in age, skin types, and month of blood sample collection. This will allow a regression calibration approach to determine s25(OH)D levels replacing the more costly method of collection and analysis of blood samples.
STUDY DESIGN AND SETTING:
Questionnaire data from a subsample of 236 non-Hispanic whites (whites) and 209 blacks from the widely dispersed Adventist Health Study-2(n = 96,000) were used to develop prediction algorithms for races separately and combined. A single blood sample was collected from each subject, at different times throughout the year.
Models with independent variables age, sex, BMI, skin type, UV season, erythemal zone, total dietary vitamin D intake, and sun exposure factor explained 22 and 31% of the variance of s25(OH)D levels in white and black populations, respectively (42% when combined). UV season and erythemal zone determined from measured UV radiation produced models with higher R (2) than season and latitude.
Combining races with a term for race and using variables with measured UV radiation capture the variance in s25(OH)D levels better than analyzing races separately.
- Overview Dark Skin and Vitamin D
- No – 10 minutes per day of sun-UVB is NOT enough
- Vitamin D Council vs FDA concerning vitamin D deficiency in blacks and others - June 2011
- All items in Dark Skin and vitamin D
- Blacks not taking mulitvitamins were 5X more likely to be vitamin D deficient – June 2011
- Lack of vitamin D closely associated with black health disparities – Nov 2010 - Great charts
- Do blacks have a 5 year life penalty due to low vitamin D
- Dark skin births are much riskier due to lack of vitamin D