Independent supplement research / cited and compared
Understand what a supplement can do, where the evidence stops, and which products earn a closer look.
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Reference library
Evidence and buying guide
Vitamin D3 supports bone health by enhancing calcium absorption and promoting immune function. It is often used to address deficiency, support mood, and maintain overall wellness, especially for those with limited sun exposure.
Evidence and buying guide
Omega-3 is an essential fatty acid that supports heart health, brain function, and may help reduce inflammation. It is commonly used to promote joint health and immune support.
Evidence and buying guide
Magnesium is an essential mineral that supports muscle and nerve function, promotes relaxation, and contributes to bone health. It is commonly used to alleviate muscle cramps, support sleep quality, and help manage anxiety and stress.
From the research desk
Human trials suggest that L-ornithine may influence subjective fatigue, mood, and some sleep-related measures in healthy adults, but the evidence remains small, short-term, and mostly from Japanese study populations. Cortisol findings are inconsistent, objective sleep evidence is limited, and clinical benefits for diagnosed conditions have not been established.
Human research suggests L-carnosine may influence selected glycation-related and metabolic biomarkers, but evidence remains limited, short-term, and concentrated in people with diabetes or metabolic risk. Healthy-aging findings often involve beta-alanine or anserine-carnosine mixtures rather than isolated L-carnosine.
Human research on alpha-ketoglutarate and aging remains early. A small uncontrolled formulation study and a larger observational cohort reported lower DNA-methylation-based biological-age measures, but neither establishes that AKG slows aging or improves healthspan. A randomized trial has been conducted, yet published results have so far focused on recruitment rather than efficacy.