15 Supplements Reviewed by a PhD - 62 Studies Later

Supplements Review: Insights from 62 Studies

Overview of the Supplement Assessment Methodology

• The speaker reviews a list of supplements based on findings from 62 studies, using dual criteria: strength of scientific evidence and magnitude of effect.

• Instead of assigning a single letter grade, each supplement is discussed independently to reflect its unique evidence and effects.

• Assessments are outcome-specific; conclusions about one health aspect (e.g., heart health) should not be generalized to others (e.g., bone health).

• A promise is made to provide recommendations at the end, clarifying that this is not personalized advice.

Bourberine for Colon Cancer

• Recent compelling studies show bourberine reduces the number and severity of colon adenomomas compared to placebo.

• Remarkably, participants maintained reduced risk even six years after stopping bourberine intake.

• Effectiveness score rated an A due to strong results; however, strength of evidence receives a C as it relies on a single randomized control trial.

• The effective dose used in studies was 600 mg per day.

Curcumin for Arthritis

• Curcumin shows mild pain relief and improved joint function based on both human clinical evidence and animal mechanistic studies.

• While there are over 30 studies supporting curcumin's benefits, the overall effect size remains mild, leading to a C rating for effectiveness.

• Strength of evidence rated B due to multiple studies with varying quality; doses typically range from 1,000 to 2,000 mg per day.

Uralithna and Immune Aging

• Uralithna is noted for its potential benefits in pain relief for osteoarthritis and improving exercise performance while combating immune decline in older adults.

• Despite impressive claims backed by several randomized control trials, actual functional outcomes often show small effects.

• Strength of evidence rated B due to several human trials; however, effect size receives a D. Typical dosage is around 1,000 mg per day.

Omega-3 Fats and Dementia

• New meta-analysis confirms omega-3 fats' role in reducing dementia risk across various brain disorders with good strength of evidence rated B leaning towards A.

• Immediate effects are small but long-term benefits could be significant; thus effectiveness also rated B.

• Effective doses can vary; low doses like 500 mg may help but optimal benefit appears at around one gram specifically for brain health.

Lithium and Alzheimer's Disease

• Elemental lithium has gained attention for its potential role against Alzheimer's disease supported by multiple human trials alongside recent major research findings.

Effectiveness of Various Supplements

Lithium and Alzheimer's Disease

• Lithium shows a substantial effect size rated at B, indicating potential long-term benefits for brain health, though it is not a cure for Alzheimer's.

• The dosage used in trials is typically around 400 micrograms.

Collagen for Skin Health

• A meta-analysis initially raised concerns about collagen's effectiveness, but further independent studies mostly report positive outcomes for skin benefits.

• The strength of evidence for collagen supplementation is rated as C due to many studies with varying quality; the typical dose is around 10 grams of hydrolyzed collagen.

Mangiferin and Brain Function

• Mangiferin, derived from mangoes, may reduce brain inflammation and improve function; however, most evidence is mechanistic with limited human studies leading to a D rating for both strength of evidence and effect size.

• Recommended daily intake of mangiferin extracts is approximately 400 milligrams.

Collagen for Joint Health

• Collagen supplementation shows mild effects on joint health primarily studied in individuals with arthritis; thus, its effectiveness may be lower in those without significant joint issues.

• The strength of evidence remains around C or possibly B due to numerous studies despite variable quality; the common dosage is also about 10 grams per day or more.

Magnesium's Role in Brain Health

• Evidence regarding magnesium's impact on brain health is convoluted, with some studies suggesting risks associated with excess intake; hence it receives a D rating for strength and an F for effectiveness concerning brain health specifically.

• Recommended dietary allowance stands at approximately 400 mg per day for men and 320 mg for women.

Potassium's Impact on Heart Health

• Potassium plays a crucial role in regulating blood pressure and reducing stroke risk; the strength of evidence supporting this claim rates as solid B while its effectiveness scores an A.

• Balancing potassium intake with sodium can enhance cardiovascular health; consider using potassium chloride salt as an alternative to regular salt when cooking or seasoning food.

Effectiveness of Supplements for Health

MCTs and Rheumatoid Arthritis

• A study indicated some benefit of medium-chain triglycerides (MCTs) on rheumatoid arthritis symptoms, but it had biases that affect its reliability.

• The strength of evidence for MCT effectiveness is rated as D, with a similar effect size rating. More research may change this outlook.

• The dosage used in the study was 30 grams per day.

Methylene Blue and Cognitive Health

• There are few randomized control trials on methylene blue's effects on cognitive health, but some reviews suggest potential benefits.

• Most studies have methodological issues or focus on inconsequential outcomes, leading to inconsistent results regarding dementia.

• The strength of evidence for methylene blue is rated as D, with an effect size also at D until more convincing data emerges.

Muscle Mass Supplements: HMBB and TMG

• HMBB (beta hydroxy beta methylbutyrate) and TMG (trimethyl glycine) show modest benefits for muscle mass when paired with resistance training.

• Evidence quality is fair; strength of evidence is rated C if training occurs, while the effect size remains small. Without exercise, the effect size drops to F.

• Recommended dosing for both supplements is around 2.5 to 3 grams.

Vitamin D and Bone Health

• Vitamin D supplementation can preserve bone health in those deficient but may worsen bone health at very high doses (in tens/hundreds of thousands IU).

• Low doses (<1000 IU) are beneficial for vitamin D-deficient individuals; overall evidence quality is rated B.

• Effectiveness varies based on individual vitamin D status; normal levels yield minimal impact from supplementation.

Summary Recommendations

• Recommended supplements include creatine, omega-3 fatty acids, lutein, and zeaxanthin based on extensive analysis over the past year.

• These supplements support brain function, cardiovascular health, and eye health respectively; they should complement good nutrition and lifestyle habits.