An evaluation of the relative contributions of exposure to sunlight and of diet to the circulating concentrations of 25-hydroxyvitamin D in an elderly nursing home population in Boston

Influence of Season and Latitude on the Cutaneous Synthesis of Vitamin D₃: Exposure to Winter Sunlight in Boston and Edmonton Will Not Promote Vitamin D₃Synthesis in Human Skin*

1988 • 1,640 citations

Aging decreases the capacity of human skin to produce vitamin D3.

1985 • 1,404 citations

Harrison's Principles of Internal Medicine.

1987 • 1,211 citations

Changes in Bone Mineral Density of the Proximal Femur and Spine with Aging

1982 • 817 citations

Photosynthesis of Previtamin D ₃ in Human Skin and the Physiologic Consequences

1980 • 742 citations

Sunscreens Suppress Cutaneous Vitamin D₃Synthesis*

1987 • 592 citations

Regulation of Cutaneous Previtamin D ₃ Photosynthesis in Man: Skin Pigment Is Not an Essential Regulator

1981 • 544 citations

Spectral Character of Sunlight Modulates Photosynthesis of Previtamin D ₃ and Its Photoisomers in Human Skin

1982 • 534 citations

Vitamin D and bone health in the elderly

1982 • 515 citations

Human exposure to ultraviolet radiation. Risks and regulations

1987 • 412 citations

Deficient Production of 1,25-Dihydroxyvitamin D in Elderly Osteoporotic Patients

1981 • 373 citations

Seasonal Changes in Human Plasma Levels of 25-Hydroxyvitamin D

1974 • 343 citations

Vitamin-D Synthesis and Metabolism after Ultraviolet Irradiation of Normal and Vitamin-D-Deficient Subjects

1982 • 286 citations

Possible dosimeter for ultraviolet radiation

1976 • 281 citations

Vitamin D status in the elderly: seasonal substrate deficiency causes 1,25-dihydroxycholecalciferol deficiency

1987 • 240 citations

Diet, sunlight, and 25-hydroxy vitamin D in healthy children and adults.

1979 • 234 citations

Nutritional status in a healthy elderly population: vitamin D

1982 • 217 citations

Plasma Levels and Therapeutic Effect of 25-Hydroxycholecalciferol in Epileptic Patients taking Anticonvulsant Drugs

1972 • 215 citations

Osteomalacia: Current Concepts

1978 • 187 citations

Measurement of 25-hydroxyvitamin D in serum and its relation to sunshine, age and vitamin D intake in the Danish population

1979 • 185 citations

Serum Vitamin D₂and Vitamin D₃Metabolite Concentrations and Absorption of Vitamin D₂in Elderly Subjects*

1986 • 159 citations

OSTEOMALACIA–A COMMON DISEASE IN ELDERLY WOMEN

1967 • 141 citations

Hypovitaminosis D and elevated serum alkaline phosphatase In elderly Irish people

1985 • 124 citations

SEASONAL VARIATION IN SERUM-25-HYDROXYVITAMIN-D IN THE ELDERLY IN BRITAIN

1977 • 100 citations

A Seasonal Variation Study of 25-Hydroxyvitamin D₃Serum Levels in Normal Humans

1979 • 93 citations

Vitamin D Intake, Sunlight Exposure and 25-Hydroxyvitamin D Levels in the Elderly during One Year

1984 • 89 citations

Vitamin D nutrition in relation to season and occupation

1981 • 77 citations

Vitamin D from Skin: Contribution to Vitamin D Status Compared with Oral Vitamin D in Normal and Anticonvulsant-Treated Subjects

1982 • 72 citations

Vitamin D Deficiency in Welfare Institutions for the Aged

1980 • 64 citations

Vitamin D requirements for the elderly

1986 • 55 citations

Vitamin D status of the elderly in relation to age and exposure to sunlight.

1984 • 30 citations

SEASONAL CHANGES IN THE BIOCHEMICAL INDICES OF VITAMIN D DEFICIENCY IN THE ELDERLY: A COMPARISON OF PEOPLE IN RESIDENTIAL HOMES, LONG-STAY WARDS AND ATTENDING A DAY HOSPITAL

1986 • 28 citations

Biological effects of ultraviolet radiation

1987 • 27 citations

Correlation of seasonal variation of 25-hydroxycalciferol with UV radiation dose

1980 • 24 citations

Serum levels of vitamin D3 and 25-hydroxyvitamin D3 in elderly and young adults.

1988 • 23 citations