21st Century, 21st Century, Vitamin C, Prolonged Release, 500 mg, 110 Tablets

Name: 21st Century, Vitamin C, Prolonged Release, 500 mg, 110 Tablets
Brand: 21st Century
Rating: 4.8 (2220 reviews)

21st Century, Vitamin C, Prolonged Release, 500 mg, 110 Tablets — product photo 1

Product photo 1 of 6

Scored for

Outcome alternatives

21st Century110 count • 110 servingsAvailable now$7.59$0.07 / serving4.8 · 2,220 ratings6 / day

86−3 pts from leader

#132 of 4874 ranked for vitamin c statusLeader · Country Life, Country Life, Chewable Acerola, Vitamin C Complex, Berry, 180 Wafers — 89

Why this ranks #132 for vitamin c status

Evidence fitAscorbic Acid is the strongest evidence signal for this outcome.
Dose fitAscorbic Acid at 500 mg lands inside the studied 50-1000 mg window.
Price / serving$0.05 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 C status

What's inside

500 mgIn rangeinside the studied 50-1000 mg 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

$7.99+0% vs avg

Jul 18Jul 5

6 / day-6% 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

2,220+4% vs avg

Jul 18Jul 5

By outcome

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

12 outcomes

Show alternatives

Vitamin C statusScoring−3 pts from leader

Product 86Leader 89

Show alternatives

Antioxidant capacity−11 pts from leader

Product 83Leader 94

Show alternatives

Uric acid−7 pts from leader

Product 78Leader 85

Show alternatives

Common cold duration−32 pts from leader

Product 54Leader 86

Show alternatives

Blood pressure−36 pts from leader

Product 53Leader 89

Showing the top 5 of 12 ranked outcomes.

What buyers report

Review Intelligence

4.8/ 5.0 · 2,220 reviews

Neutral read

“Customers appreciate the high quality and affordability of this Vitamin C supplement. Many highlight its ease on the stomach, small tablet size, and lack of bad taste, making it easy to swallow. The product is praised for its immune-boosting properties and prolonged release feature. Users frequently mention the good packaging and reliable delivery. Several customers are repeat buyers, indicating satisfaction with the results. The flip-top packaging is noted for convenience in pill management. Overall, it's considered a great value for money with trusted ingredients from a reputable brand.”

Highlights

Easy swallow

Boost immunity

Prolonged release

Highly recommend

Affordable & well-packed

Immune system

Flip top

Observations

Effective ingredients

Value for money

Concerns

No concerns surfaced yet