KAL C 1000+, Sustained Release, 250 Tablets supplement bottle
KAL

C 1000+, Sustained Release, 250 Tablets

What We Researched
5 active ingredients analyzed · 3 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
55
Product Score Poor
73
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Ascorbic Acid) 1,000 mg 1,111%
Rose Hips 20 mg *
Bioflavonoid Concentrate (from Citrus) 10 mg *
Hesperidin Concentrate 10 mg *
Rutin Concentrate 10 mg *
Bioavailability Fair

Absorption Rating

  • Vitamin C (as Ascorbic Acid) Fair
  • Rose Hips Fair
  • Bioflavonoid Concentrate (from Citrus) Fair
  • Hesperidin Concentrate Fair
  • Rutin Concentrate Fair
Other Ingredients Fair

Fillers & Additives

No inactive ingredient data available.

Efficacy Poor

Dosage Analysis

  • Vitamin C (as Ascorbic Acid) 1,000 mg Effective
  • Rose Hips 20 mg Under-dosed
  • Bioflavonoid Concentrate (from Citrus) 10 mg Under-dosed
  • Hesperidin Concentrate 10 mg Under-dosed
  • Rutin Concentrate 10 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Ascorbic Acid) 1,000 mg 1,111%
Rose Hips 20 mg *
Bioflavonoid Concentrate (from Citrus) 10 mg *
Hesperidin Concentrate 10 mg *
Rutin Concentrate 10 mg *

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$26$25$24$23$22 Mar 12 $24.00
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
KAL

Founded 1932 · Salt Lake City, Utah, United States · 289 products · kalvitamins.com

Certifications

3 certifications
Nsf Gmp Verified Source
Fda Gmp Inspections Verified Source
Usda Organic Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source

Violation History

1 incident
Lawsuit A consumer class action was filed alleging that the marketing of a dietary supplement violated California's consumer-protection laws.2013Source
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Frequently Asked Questions
Is KAL C 1000+, Sustained Release a good supplement?

KAL C 1000+, Sustained Release, 250 Tablets received a product quality score of 55/100 in GoodSupp's independent analysis, indicating several areas of concern that consumers should review. The product contains 5 active ingredients The manufacturer, KAL, holds a brand trust score of 73/100 with 3 verified certifications including Nsf Gmp, Fda Gmp Inspections, Usda Organic.

What are the ingredients in KAL C 1000+, Sustained Release?

KAL C 1000+, Sustained Release contains 5 active ingredients: Vitamin C (as Ascorbic Acid) (1,000 mg), Rose Hips (20 mg), Bioflavonoid Concentrate (from Citrus) (10 mg), Hesperidin Concentrate (10 mg), Rutin Concentrate (10 mg). Notable high-dose ingredients include Vitamin C at 1,111% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is KAL C 1000+, Sustained Release safe to take?

KAL C 1000+, Sustained Release, 250 Tablets has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is KAL a trustworthy supplement brand?

KAL receives a brand trust score of 73/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1932 and headquartered in Salt Lake City, Utah, United States, the company offers 289 products in their lineup. They hold 3 verified certifications including Nsf Gmp, Fda Gmp Inspections, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: KAL has 1 historical regulatory incident on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.