21st Century, 21st Century, Vitamin D3, 25 mcg (1,000 IU), 300 Tablets

Name: 21st Century, Vitamin D3, 25 mcg (1,000 IU), 300 Tablets
Brand: 21st Century
Rating: 4.8 (3051 reviews)

21st Century, Vitamin D3, 25 mcg (1,000 IU), 300 Tablets — product photo 1

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Scored for

Outcome alternatives

21st Century300 count • 300 servingsAvailable now$7.12$0.02 / serving4.8 · 3,051 ratings3 / day

72−15 pts from leader

#696 of 8136 ranked for vitamin d statusLeader · ChildLife Essentials, ChildLife Essentials, Vitamin D3, Natural Berry, 12.5 mcg (500 IU), 1 fl oz (30 ml) — 87

Why this ranks #696 for vitamin d status

Evidence fitVitamin D3 (Cholecalciferol) is the strongest evidence signal for this outcome.
Dose fitVitamin D3 (Cholecalciferol) at 25 mcg sits below the studied 400-5000 IU window.
Price / serving$0.02 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustStrong trust signals — consistently high marks from verified buyer ratings.

Trade-offsPopularity trails the other picks hereDose fit is the weak spot on this list

The numbers · Vitamin D status

What's inside

25 mcgBelow rangebelow the studied 400-5000 IU window

Retailer links may be affiliate links. Rankings and placement are not paid placement.

Open at iHerb

Market trends

Price and daily demand history · last 10 crawls

$9.49+0% vs avg

Jul 18Jul 5

3 / day+0% vs avg

Jul 18Jul 5

Rating history

Rating quality and social-proof history · last 10 crawls

4.80 / 5+0% vs avg

Jul 18Jul 5

3,051+3% vs avg

Jul 18Jul 5

By outcome

vs overall leader for each ranked outcome — open any outcome to see its ranked alternatives.

8 outcomes

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Vitamin D statusScoring−15 pts from leader

Product 72Leader 87

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All-cause mortality−17 pts from leader

Product 70Leader 87

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Bone mineral density−22 pts from leader

Product 70Leader 92

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Fracture risk−23 pts from leader

Product 69Leader 92

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Fall risk−18 pts from leader

Product 69Leader 87

Showing the top 5 of 8 ranked outcomes.

What buyers report

Review Intelligence

4.8/ 5.0 · 3,051 reviews

Neutral read

“Customers consistently praise the high quality, effective dosage, and affordability of this vitamin D supplement. Many appreciate the small tablet size, making it easy to swallow and integrate into daily routines. The product is noted for its positive impact on overall health, particularly in boosting immunity and supporting bone health. Users living in areas with limited sunlight find it especially beneficial during winter months. The packaging is frequently mentioned as strong and reliable, with a generous quantity of tablets per package. Some customers express concerns about the inclusion of calcium, but overall satisfaction remains high with many repeat purchases and recommendations.”

Highlights

Affordable option

Helpful supplement

Energy boost

Good results

Long-lasting value

Small tablets

Boost immunity

Game-changer

Observations

Boosting immune

Concerns

High dosage