Douglas Laboratories Ascorbplex 1000™ (Buffered Vitamin C)
vs
Metagenics Kaprex
Supplement Comparison

  • Blend: Metagenics Kaprex has 2.8× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 10 nutrients compared
Bar chart: per-serving label amounts and listed forms for Douglas Laboratories Ascorbplex 1000™ (Buffered Vitamin C) vs Metagenics Kaprex.

Frequently asked questions

Which active ingredients does Douglas Laboratories Ascorbplex 1000™ (Buffered Vitamin C) have?

  • Vitamin C appears as Calcium, Magnesium, Potassium Ascorbates and Ascorbic Acid
  • Calcium appears as Calcium Ascorbate and Carbonate Complex
  • Magnesium appears as Magnesium Ascorbate and Oxide Complex
  • Potassium appears as Potassium Ascorbate and Chloride Complex
  • Blend appears as Citrus Pectin and Citrus Bioflavonoids Complex

Which active ingredients does Metagenics Kaprex have?

  • Blend appears as Proprietary Blend Tetrase Rosemary Leaf Extract Oleanolic Acid from Olive Leaf Extract

Which categories do Douglas Laboratories Ascorbplex 1000™ (Buffered Vitamin C) and Metagenics Kaprex belong to?

  • Single Vitamin
  • Joint Formula

What health concerns do Douglas Laboratories Ascorbplex 1000™ (Buffered Vitamin C) and Metagenics Kaprex address?

  • Antioxidant Support
  • General Health
  • Immune System Support
  • Anti-Inflammatory Support
  • Joint & Bone Health

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Douglas Laboratories Ascorbplex 1000™ (Buffered Vitamin C): 1 tablet
    • Metagenics Kaprex: 1 softgel
  • Vitamin C
    • This supplement has 1000 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Calcium
    • This supplement has 90 mg
    • Recommended Dietary Allowance in men: 1000 mg
    • Recommended Dietary Allowance in women: 1000 mg
    • Tolerable Upper Intake Level: 2500 mg
  • Potassium
    • This supplement has 60 mg
    • Adequate Intake in men: 3400 mg
    • Adequate Intake in women: 2600 mg
    • Tolerable Upper Intake Level: Not established

Last updated: January 3, 2026

  • Sources & Methodology: Nutrient data and forms are taken directly from Supplement Facts labels. Reviewed and standardized by the VIOscan Research Team. Learn more on the Methodology page.
  • We show the Recommended Dietary Allowance (RDA) when available. If no RDA exists, we show the Adequate Intake (AI). Tolerable Upper Intake Levels (UL) are used for upper limits. Unless otherwise noted, RDAs shown correspond to healthy adults aged 19–50 years and are sex-specific. Separate values exist for 51–70 years and >70 years, and pregnancy and lactation are excluded. All values come from the Dietary Reference Intakes (DRIs) published by the National Academies of Sciences, Engineering, and Medicine (NASEM), Food and Nutrition Board (FNB).
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  • Editorial standards: we provide independent, impartial and objective data analysis.
  • This analysis is for educational purposes only. It is not a substitute for medical advice.
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  • Author: VIOscan Research Team