From Examine.com
In addition to the Vitamin D matrix, below, Examine has information on many other supplementsAs of May 2013 their popular supplements were: Fish Oil (725 references), Creatine (471 references), Caffeine (403 references), Agmatine (349 references), Vitamin D (301 references) Coenzyme Q10 (301 references), Melatonin (296 references), Berberine (282 references), Nicotine (255 references), Whey Protein (251 references) Sodium Bicarbonate (247 references), L-Carnitine (246 references)
Grade | Level of Evidence |
---|---|
A | Robust research conducted with repeated double blind clinical trials |
B | Multiple studies where at least two are double-blind and placebo controlled |
C | Single double blind study or multiple cohort studies |
D | Uncontrolled or observational studies only |
Level of Evidence | Effect | Change | Magnitude of Effect Size | Scientific Consensus | Comments |
---|---|---|---|---|---|
A | Risk of Falls | Notable | The risk of falls in the elderly (and subsequently, rate of bone fractures) appears to be significantly reduced with Vitamin D supplementation at 700 IU or greater, with... show | ||
A | Cardiovascular Disease Risk | Minor | There appears to be less risk of cardiovascular disease and related cardiovascular complications with supplementation of 1,000 IU of Vitamin D or higher serum levels of... show | ||
B | Colorectal Cancer Risk | Notable | 100% See study | The association between serum Vitamin D at 37ng/mL and colorectal cancer is is approximately a halving of risk according to one meta-analysis, which is a notable risk reduction | |
B | Bone Fracture Risk | Minor | 100% See study | A decrease in bone fracture risk (nonvetebral and hip) appears to exist when supplemental doses of Vitamin D3 are taken above 800 IU, with this protective effect being... show | |
B | Blood Pressure | Minor | 100% See 2 studies | Both correlational and intervention studies note that higher cohorts of serum Vitamin D have less blood pressure than lower cohorts, establishing a role for Vitamin D in... show | |
B | Parathyroid Hormone | Strong | Vitamin D supplementation is the reference drug for reductions in parathyroid hormone due to directly negatively regulating its secretion | ||
B | Fat Mass | Minor | Mixed effects on overweight/obese persons, but it appears that normalizing a deficiency may aid fat loss in persons of higher body weight. Insufficient evidence to suggest... show | ||
C | All-Cause Mortality | Minor | 100% See 2 studies | Cohorts of people with higher serum Vitamin D appear to die less frequently than cohorts with less serum Vitamin D; this may be heavily influenced by reducing falls in... show | |
C | Insulin Secretion | Minor | An improvement in insulin secretion is noted in diabetics (type II mostly) and in persons at risk for diabetes, which is thought to be secondary to protective effects at... show | ||
C | Insulin Sensitivity | Minor | Improvements in insulin sensitivity can occur secondary to increasing pancreatic insulin secretion | ||
C | Weight | 100% See 2 studies | No significant alterations noted in weight, even when fat mass is lost, in obese persons | ||
C | Triglycerides | Minor | 100% See study | The decrease in triglycerides is present after long term ingestion of Vitamin D, although it isn't to a highly significant degree | |
C | TNF-Alpha | Minor | 100% See study | A decrease has been noted over time relative to placebo, of relatively minor magnitude | |
C | LDL-C | Minor | 100% See study | Either no significant influence on LDL cholesterol or a slight increase (around 5%) has been noted; practical significance of this information unknown | |
C | Metabolic Rate | 100% See study | No detectable influence on metabolic rate over time | ||
C | Influenza | Minor | 100% See 2 studies | May reduce the risk of catching the flu | |
C | Asthma Attacks | Minor | 100% See study | Persons with higher serum vitamin D appear to have less frequency asthmatic attacks relative to persons with lower Vitamin D levels | |
C | Testosterone | Minor | 100% See study | An increase in testosterone has been noted in men with 3,332 IU of Vitamin D over the course of a year | |
C | Functionality in Elderly or Injured | Notable | 100% See study | An improvement in muscular and neural functionality in the elderly is thought to underlie the reductions of fall risk and reduced bone fracture rate seen in elderly cohorts | |
C | HbA1c | 100% See 2 studies | The decrease in HbA1c is statistically insignificant and very small in magnitude, likely not a concern. | ||
C | Interleukin 5 | Minor | 100% See study | An increase in IL-5 has been noted with Vitamin D supplementation | |
C | Lean Mass | Minor | An increase in lean mass has been noted in dieting obese women relative to control (2,000IU) and a trend to reduce lean mass relative to control has been noted in exercising... show | ||
C | Food Intake | 100% See study | No significant alterations in food intake noted with Vitamin D supplementation | ||
C | Endothelial Function | 100% See study | No significant influence on endothelial function | ||
C | Inflammation | 100% See study | No significant influence on select inflammatory cytokines | ||
C | Calcium Absorption | 100% See study | Superloading Vitamin D (rather than staying sufficient) does not appear to further increase absorption rates of calcium, although normalizing a deficiency can aid in absorption... show | ||
C | Symptoms of Systemic Lupus Erythematosus | Minor | 100% See study | Inflammatory symptoms associated with Lupus appear to be reduced with Vitamin D ingestion | |
C | Upper Respiratory Tract Infection Risk | 100% See study | Lack of efficacy in reducing rate of sickness | ||
C | Height | Minor | 100% See study | A higher vitamin D level in serum during growth spurts in children is associated with greater heights during adulthood; currently no evidence to support the role of Vitamin... show | |
C | Symptoms of Tubercolosis | Minor | 100% See study | A decrease in symptoms associated with tuberculosis are noted with Vitamin D | |
C | Insulin | 100% See study | No significant influence on fasting insulin levels | ||
C | Blood glucose | 100% See study | No significant influence on fasting blood glucose levels | ||
C | Power Output | 100% See study | Although a trend to increase power output has been noted, most research suggest no such benefit | ||
D | Risk of Multiple Sclerosis | Notable | 100% See study | The risk of developing MS is significantly reduced by both sunlight, latitude, and supplemental Vitamin D | |
D | Breast Cancer Risk | Minor | 100% See 2 studies | There is less risk of breast cancer associated with Vitamin D supplementation | |
D | Pancreatic Cancer Risk | Minor | 100% See study | Appears to be associated with less risk of pancreatic cancer | |
D | Arthralgia | Minor | 100% See 2 studies | May reduce symptoms of athralgia | |
D | Incidence of Type 1 Diabetes | Minor | 100% See study | May reduce the incidence of type 1 diabetes in offspring and adults when supplemented (for the former, but the mothers) | |
D | Symptoms of Multiple Sclerosis | Minor | 100% See study | There appears to be a lower relapse rate in multiple sclerosis patients when Vitamin D is present at higher concentrations |