Thorne Basic Nutrients 2/Day - NSF
vs
Douglas Laboratories Natural C
Supplement Comparison

  • Vitamin C: Douglas Laboratories Natural C has 4.0× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 49 nutrients compared
Bar chart: per-serving label amounts and listed forms for Thorne Basic Nutrients 2/Day - NSF vs Douglas Laboratories Natural C.

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Frequently asked questions

Which active ingredients does Thorne Basic Nutrients 2/Day - NSF have?

  • Vitamin A appears as Beta Carotene
  • Vitamin A appears as Retinyl Palmitate
  • Vitamin C appears as Ascorbic Acid
  • Vitamin D appears as Cholecalciferol (D3)
  • Vitamin E appears as d-Alpha Tocopheryl Acid Succinate
  • Vitamin E appears as Gamma Tocopherol
  • Vitamin K appears as Vitamin K1 Phytonadione
  • Vitamin K appears as Vitamin K2 Menaquinone-4 (MK-4)
  • Vitamin B1 (Thiamin) appears as Thiamin HCl
  • Vitamin B2 (Riboflavin) appears as Riboflavin 5-Phosphate Sodium
  • Vitamin B3 (Niacin) appears as Niacinamide
  • Vitamin B6 (Pyridoxine) appears as Pyridoxal 5-Phosphate
  • Vitamin B9 (Folate) appears as L-5-Methyltetrahydrofolate
  • Vitamin B12 (Cobalamin) appears as Methylcobalamin
  • Vitamin B7 (Biotin) appears as D-Biotin
  • Vitamin B5 (Pantothenic Acid) appears as Calcium Pantothenate
  • Calcium appears as TRAACS Calcium Bisglycinate Chelate, Dicalcium Phosphate, Calcium Laurate, Calcium Pantothenate
  • Iodine appears as Potassium Iodide
  • Magnesium appears as TRAACS Magnesium Bisglycinate (Albion)
  • Zinc appears as TRAACS Zinc Bisglycinate (Albion)
  • Selenium appears as L-Selenomethionine
  • Copper appears as TRAACS Copper Bisglycinate (Albion)
  • Manganese appears as TRAACS Manganese Bisglycinate (Albion)
  • Chromium appears as TRAACS Chromium Nicotinate Glycinate Chelate (Albion)
  • Boron appears as Bororganic Glycine Complex
  • Lutein appears as Lutein Marigold Flower Extract

Which active ingredients does Douglas Laboratories Natural C have?

  • Vitamin C appears as Ascorbic Acid
  • Citrus Bioflavonoid Complex

Which categories do Thorne Basic Nutrients 2/Day - NSF and Douglas Laboratories Natural C belong to?

  • Multivitamin
  • Single Vitamin

What health concerns do Thorne Basic Nutrients 2/Day - NSF and Douglas Laboratories Natural C address?

  • Antioxidant Support
  • Nerve Health & Comfort Support
  • Blood Sugar Support
  • Brain, Focus & Cognitive Function
  • General Health
  • Healthy Aging & Longevity
  • Heart & Cardiovascular Health
  • Immune System Support
  • Joint & Bone Health
  • Skin, Hair & Nail Health
  • Respiratory Health

Which product has a higher amount of Vitamin C per serving?

  • Douglas Laboratories Natural C has the highest total amount of Vitamin C: 1000 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Thorne Basic Nutrients 2/Day - NSF: 2 capsules
    • Douglas Laboratories Natural C: 1 tablet
  • Vitamin A
    • This supplement has 1050 mcg RAE
    • Recommended Dietary Allowance in men: 900 mcg RAE
    • Recommended Dietary Allowance in women: 700 mcg RAE
    • Tolerable Upper Intake Level: 3000 mcg RAE
  • Vitamin C
    • This supplement has 250 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Vitamin D
    • This supplement has 2000 IU
    • Recommended Dietary Allowance in men: 600 IU
    • Recommended Dietary Allowance in women: 600 IU
    • Tolerable Upper Intake Level: 4000 IU
  • Vitamin E
    • This supplement has 40.5 mg
    • Recommended Dietary Allowance in men: 15 mg
    • Recommended Dietary Allowance in women: 15 mg
    • Tolerable Upper Intake Level: 1000 mg
  • Vitamin K
    • This supplement has 400 mcg
    • Adequate Intake in men: 120 mcg
    • Adequate Intake in women: 90 mcg
    • Tolerable Upper Intake Level: Not established
  • Vitamin B1 (Thiamin)
    • This supplement has 50 mg
    • Recommended Dietary Allowance in men: 1.2 mg
    • Recommended Dietary Allowance in women: 1.1 mg
    • Tolerable Upper Intake Level: Not established
  • 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

Last updated: January 29, 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).
  • Transparency: We’re funded by our users. We don’t have sponsors or affiliate links, and we don’t sell supplements.
  • 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