Background/Aim: This paper reviews ecological studies of the ultraviolet-B (UVB)–vitamin D–cancer hypothesis based on geographical variation of cancer incidence and/or mortality rates. Materials and Methods: The review is based largely on three ecological studies of cancer rates from the United States; one each from Australia, China, France, Japan, and Spain; and eight multicountry, multifactorial studies of cancer incidence rates from more than 100 countries. Results: This review consistently found strong inverse correlations with solar UVB for 15 types of cancer: bladder, breast, cervical, colon, endometrial, esophageal, gastric, lung, ovarian, pancreatic, rectal, renal, and vulvar cancer; and Hodgkin’s and non-Hodgkin’s lymphoma. Weaker evidence exists for nine other types of cancer: brain, gallbladder, laryngeal, oral/pharyngeal, prostate, and thyroid cancer; leukemia; melanoma; and multiple myeloma. Conclusion: The evidence for the UVB–vitamin D–cancer hypothesis is very strong in general and for many types of cancer in particular.
What Is Stem Cell Therapy and How Does It Help With Healing and Rejuvenation?
Stem cells support the body’s natural repair processes and can be used to help address a wide range of concerns,
