Meta-analysis of Vitamin D

Created November 2014

Meta-analyses

See also Overview Meta-analysis of Vitamin D

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See also Proof that Vitamin D Works

See also All items in category Intervention Vitamin D items

See also Clinical Trials of vitamin D can have “biological flaws” – Jan 2015

See also Nice description of Meta-Analysis in Scientific American Jan 2014

See also The Misuse of Meta-analysis in Nutrition Research JAMA Sept 2017

". . . they have mixed apples and oranges—and sometimes “apples, lice, and killer whales”—yielding meaningless conclusions"

"In a 2007 review of 111 industry-funded (nutrition) studies, funding source was significantly related to study conclusions"

It does not mention the major problems of Vitamin D Meta-analyses. 1) Dose sizes are ignored: Studies assume benefit from 400 IU is the same as for 4,000 IU2) Durations are ignored: Studies assume benefit of 1 month dosing is the same as 1 year dosing3) Existing Vitamin D levels are often ignored.   Studies ignore that a 20 ng addition to a 10 ng person has vastly more benefit than a 20 ng addition to a 40 ng personA rare example of a good meta-analysis is: one on depression - April 2014Really great medical studies do not blindly give a single supplement/drug to a group, but rather treat the patients as individuals and provide extra Magnesium, Vitamin K2, Omega-3, Vitamin C, etc as needed. These studies, which have the best results, are not Random Controlled Trials and are virtually never included in a meta-analysis.Likewise, the trials which give vitamin D to an entire country, or to all of the patients (immoral not to do so) are never considered by any meta-analysis

Vitamin D has climbed the pyramid for decades, but has not yet reached the top

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International prospective register of on-going systematic reviews: 569 reviews of Vitamin D as of March 2020

PROSPERO

Intervention - Vitamin D includes the following:

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Vitamin D Life - Vitamin D meta-analyses for different health problems

Number of Meta-analyses per health problem

ADHD7, Autism7, Autoimmune5, Back pain5, Bone -8, Breathing35, Cancer - Bladder5, Cancer - Breast24, Cancer - Colon25, Cancer - Liver4, Cancer - Lung7, Cancer - Lymphoma4, Cancer - Pancreatic4, Cancer - Prostate8, Cancer16, Cardiovascular38, Cognitive22, Depression16, Diabetes38, Falls and Fractures23, Fertility and sperm6, Genetics4, Gut9, Hypertension22, Infant-Child23, Inflammation11, Kidney12, Liver4, Metabolic Syndrome5, Mortality 28, Multiple Sclerosis13, Obesity8, Osteoarthritis4, Osteoporosis9, Pain - chronic5, Parkinson12, Pregnancy51, Psoriasis6, Rheumatoid Arthritis8, Seniors13, Skin8, Sleep4, Sports11, Stroke8, Thyroid and parathyroid5, Trauma and surgery19, Tuberculosis14, UV and Vitamin D4, Virus37, Vision6, Women7, Youth4

20 Most-visited pages in Meta-analysis category in Vitamin D Life

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All of the articles in Meta-Analysis - sorted by date

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Short URL =https://is.gd/MetaD

Tags: Details Evidence Meta-analysis