Comparison
Compare evidence before buying.
Side-by-side scores from cited research. Narrow by category, then pick the exact products you want to weigh against each other.
All productsFitness (7)Skincare (7)Sleep (6)Cognitive Enhancement (4)Heart Health (4)Metabolic Health (4)Nutrition (4)Biomarker Testing (3)Bone & Joint Health (3)Supplements (3)Hormonal Health (2)Immune Health (2)Mental Health (2)Oral Health (2)Recovery (2)Respiratory Health (2)Air Quality (1)Blood Testing (1)Cold Therapy (1)Gut Health (1)Microbiome Testing (1)Red Light Therapy (1)Saunas (1)Vision Health (1)Water Quality (1)Wearables (1)Women's Health (1)
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| Product |  Vitamin D3 5000 IU + K2 (MK-7) 100mcg Sports Research · Immune Health |
|---|---|
| Evidence Score | 77Strong |
| Safety Score | 59Good |
| Effectiveness | 77Strong |
| Research Confidence | 68Good |
| Product Fit | 74Strong |
| Evidence directness | Ingredient-level evidence |
| Papers indexed | 3 |
| Top verified claim | Delivers a supplemental dose sufficient to raise low serum vitamin D over weeks. |
| Price | $21.95 |
| Open evidence page |
Scores reflect cited research, not medical advice. Highlighted cells mark the strongest score per row among the products shown.