Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels vs Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels
Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels (#2, best premium) vs Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels (#4): in our Vitamin D3 + K2 Supplements scoring the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels totals 7.4/10 and…
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Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels
$20.97Check price at iHerbRead full review
Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels
Check price at iHerbRead full reviewTopsFive comparison scores
Side by side
| Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels | Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels | |
|---|---|---|
| Price | $20.97 | — |
| D3 Form and Source | Cholecalciferol; source not stated on the label | Cholecalciferol from lichen (VegaDELight) |
| Vitamin D3 per Serving | 25 mcg (1,000 IU) | 125 mcg (5,000 IU) |
| K2 Form and Source | Menaquinone-7 (MK-7) from natto bean | Menaquinone-7 (MK-7) from chickpea |
| Vitamin K2 per Serving | 120 mcg | 100 mcg |
| Serving Size | 1 softgel | 1 veggie softgel |
| Delivery and Fat Carrier | Gelatin softgel with palm- and coconut-derived MCT | PlantGel softgel with coconut MCT oil and olive oil |
| Dietary and Allergen Notes | No dairy, wheat, gluten, yeast, sesame, egg, fish or shellfish; contains gelatin and beeswax | Certified Vegan and gluten-free; contains coconut |
| Testing Evidence | ISURA Verified Clean and Non-GMO seals | Label states Third Party Tested and cGMP compliant; no named potency certification or public product-specific CoA located |
How they differ in real use
Built from our vitamin d3 k2 supplements scoring, each product's published specifications, and verified owner feedback — not hands-on testing.
Both the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels and the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels made our Top 5 Vitamin D3 + K2 Supplements, at #2 (best premium) and #4. ISURA verification and substantially greater iHerb buying history than Nordic are meaningful strengths. Nordic ranks slightly higher because its D3 dose more closely matches a major adult trial, its excipient list is cleaner and its active-unit value is better. Its transparent vegan sources, oil carrier, 24,000+ reviews and 10,000+ monthly sales justify selection. The heavier-weighted testing evidence and high active-unit price keep it below California Gold Nutrition.
We score vitamin d3 + k2 supplements on Third-Party Testing (30%), Form & Bioavailability (25%), Dose vs Research (20%), Label Transparency (15%) and Value (10%). On that basis the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels totals 7.4 out of 10 and the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels 6.7. The widest gap is Third-Party Testing, where the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels scores 8 against 4 for the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels — independent certification or a published certificate of analysis. Label Transparency also separates them: 9 for the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels versus 7 for the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels. The Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels claws back ground on Form & Bioavailability and Value.
On paper, the specifications that actually differ: D3 Form and Source — Cholecalciferol; source not stated on the label on the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels versus Cholecalciferol from lichen (VegaDELight) on the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels; Vitamin D3 per Serving — 25 mcg (1,000 IU) on the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels versus 125 mcg (5,000 IU) on the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels; K2 Form and Source — Menaquinone-7 (MK-7) from natto bean on the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels versus Menaquinone-7 (MK-7) from chickpea on the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels; Vitamin K2 per Serving — 120 mcg on the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels versus 100 mcg on the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels; Serving Size — 1 softgel on the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels versus 1 veggie softgel on the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels; Delivery and Fat Carrier — Gelatin softgel with palm- and coconut-derived MCT on the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels versus PlantGel softgel with coconut MCT oil and olive oil on the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels.
The Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels lists at $20.97; the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels's current price is on the merchant page. Owners praise the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels for ISURA Verified Clean independently covers the finished product for a broad contaminant panel. and the label discloses 120 mcg of MK-7 sourced from natto bean rather than an unspecified vitamin K blend.; the most common complaint is the softgel contains gelatin, beeswax and caramel color, so it is not vegan and has more excipients than the Nordic formula. Owners praise the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels for the label identifies vegan lichen-derived D3 and chickpea-derived MK-7. and the PlantGel softgel includes coconut MCT oil and olive oil rather than requiring a separate oil carrier.; the most common complaint is at $0.43 per serving, it costs about $0.087 per 1,000 IU of D3 and $0.43 per 100 mcg of K2.
Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels
- ISURA Verified Clean independently covers the finished product for a broad contaminant panel.
- The label discloses 120 mcg of MK-7 sourced from natto bean rather than an unspecified vitamin K blend.
- The softgel contains MCT from RSPO-certified palm and coconut oils.
- The softgel contains gelatin, beeswax and caramel color, so it is not vegan and has more excipients than the Nordic formula.
- Its active-unit costs are approximately $0.35 per 1,000 IU of D3 and $0.29 per 100 mcg of K2.
Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels
- The label identifies vegan lichen-derived D3 and chickpea-derived MK-7.
- The PlantGel softgel includes coconut MCT oil and olive oil rather than requiring a separate oil carrier.
- Certified Vegan and Non-GMO Project Verified seals provide specific dietary verification.
- At $0.43 per serving, it costs about $0.087 per 1,000 IU of D3 and $0.43 per 100 mcg of K2.
- Its 5,000 IU D3 exceeds the adult upper limit, while the Third Party Tested statement does not identify a qualifying certification or public product-specific CoA.
Which should you buy?
The Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels is the better fit for buyers prioritizing named independent contaminant verification and buyers wanting 120 mcg of clearly sourced MK-7 — it is the higher-scoring pick here, chiefly for Third-Party Testing and Dose vs Research. The Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels is the better fit for vegans wanting identified plant sources for both actives and buyers prioritizing an oil-based plant softgel, and the stronger choice if Label Transparency and Form & Bioavailability matter more to you than the overall score. The Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels is a poor fit for vegans; the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels is a poor fit for buyers seeking D3 below the adult upper limit.
Choose the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels if
- Buyers prioritizing named independent contaminant verification
- Buyers wanting 120 mcg of clearly sourced MK-7
Skip it if
- Vegans
- Buyers prioritizing low cost per active unit
Choose the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels if
- Vegans wanting identified plant sources for both actives
- Buyers prioritizing an oil-based plant softgel
Skip it if
- Buyers seeking D3 below the adult upper limit
- Value-focused buyers
Common questions
Is the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels better than the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels?
In our Vitamin D3 + K2 Supplements ranking the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels scores higher overall, 7.4 to 6.7, with the biggest advantage in Third-Party Testing. The Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels is stronger on Label Transparency and Form & Bioavailability, so it is the better pick if those matter most to you.
What is the main difference between the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels and the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels?
The headline spec difference is D3 Form and Source: Cholecalciferol; source not stated on the label on the Natural Factors, Vitamin D3 & K2, 25 mcg (1,000 IU) & 120 mcg, 60 Softgels versus Cholecalciferol from lichen (VegaDELight) on the Sports Research, D3 + K2, 125 mcg/100 mcg, 60 Softgels. In use, the gap that matters most is Third-Party Testing (8 vs 4 in our scoring): independent certification or a published certificate of analysis.