21st Century, 21st Century, Vitamin D3, 500 Tablets

Name: 21st Century, Vitamin D3, 500 Tablets
Brand: 21st Century
Rating: 4.8 (3051 reviews)

21st Century, Vitamin D3, 500 Tablets — product photo 1

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Scored for

Outcome alternatives

21st Century500 count • 500 servingsAvailable now$10.44$0.02 / serving4.8 · 3,051 ratings3 / day

73−14 pts from leader

#374 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 #374 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-offsDose fit is the weak spot on this listPopularity trails the other picks here

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

$10.99+0% vs avg

Jul 18Jul 5

3 / day-17% 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−14 pts from leader

Product 73Leader 87

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All-cause mortality−15 pts from leader

Product 72Leader 87

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Bone mineral density−21 pts from leader

Product 71Leader 92

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Fracture risk−22 pts from leader

Product 70Leader 92

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Fall risk−17 pts from leader

Product 70Leader 87

Showing the top 5 of 8 ranked outcomes.

What buyers report

Review Intelligence

4.8/ 5.0 · 3,051 reviews

Neutral read

“Customers highly appreciate the 21st Century Vitamin D3 for its excellent value, affordability, and effectiveness. The product comes in a large bottle of 500 small, easy-to-swallow tablets with a dosage of 1000 IU each, making it convenient for long-term use. Many users have incorporated it into their daily health regimen and report significant improvements in energy levels, immunity, and overall well-being. The supplement is particularly valued during seasons with limited sunlight and has been praised for its quality ingredients and accurate dosage. Customers also commend the good packaging and the brand's reliability compared to other more expensive options.”

Highlights

Affordable option

Helpful supplement

Energy boost

Good results

Long-lasting value

Small tablets

Boost immunity

Game-changer

Observations

Boosting immune

Concerns

High dosage