Source Naturals Systemic C supplement bottle
Source Naturals

Systemic C

What We Researched
9 active ingredients analyzed · 4 inactive ingredients decoded · 1 brand certification checked · 1 retailer compared · Last updated: Mar 2026
73
Product Score Fair
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Total Carbohydrates 1 g 1%
Vitamin C (as Calcium Ascorbate) 1000 mg 1667%
Calcium (as Calcium Ascorbate) 110 mg 11%
N-Acetyl Cysteine 120 mg
Alpha-Lipoic Acid 100 mg
Quercetin 50 mg
Citrus Bioflavonoid Complex 40 mg
Grape seed extract 30 mg
Bioavailability Very Good

Absorption Rating

  • Total Carbohydrates Fair
  • Vitamin C (as Calcium Ascorbate) Good
  • Calcium (as Calcium Ascorbate) Good
  • N-Acetyl Cysteine Good
  • Alpha-Lipoic Acid Fair
  • Quercetin Fair
  • Grape seed extract Good
Other Ingredients Excellent

Fillers & Additives

  • Gelatin
  • Maltodextrin
  • Silica
  • Magnesium Stearate
Efficacy Very Poor

Dosage Analysis

  • Vitamin C (as Calcium Ascorbate) 1000 mg Effective
  • Calcium (as Calcium Ascorbate) 110 mg Under-dosed
  • N-Acetyl Cysteine 120 mg Under-dosed
  • Alpha-Lipoic Acid 100 mg Under-dosed
  • Quercetin 50 mg Under-dosed
  • Grape seed extract 30 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 5 kcal
Total Carbohydrates 1 g 1%
Vitamin C (as Calcium Ascorbate) 1000 mg 1667%
Calcium (as Calcium Ascorbate) 110 mg 11%
N-Acetyl Cysteine 120 mg
Alpha-Lipoic Acid 100 mg
Quercetin 50 mg
Citrus Bioflavonoid Complex 40 mg
Grape seed extract 30 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Price Comparison

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

Brand Trust Report
Source Naturals

Founded 1982 · Scotts Valley, CA, USA · 837 products · sourcenaturals.com/

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
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Frequently Asked Questions
Is Source Naturals Systemic C a good supplement?

Source Naturals Systemic C received a product quality score of 73/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 9 active ingredients with 60 servings per container. Of the 4 inactive ingredients, 3 are rated safe and 0 are flagged for review. The manufacturer, Source Naturals, holds a brand trust score of 66/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Source Naturals Systemic C?

Source Naturals Systemic C contains 9 active ingredients: Calories (5 kcal), Total Carbohydrates (1 g), Vitamin C (as Calcium Ascorbate) (1000 mg), Calcium (as Calcium Ascorbate) (110 mg), N-Acetyl Cysteine (120 mg), Alpha-Lipoic Acid (100 mg), and 3 more. Notable high-dose ingredients include Vitamin C at 1667% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Source Naturals Systemic C safe to take?

Source Naturals Systemic C 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 Source Naturals a trustworthy supplement brand?

Source Naturals receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1982 and headquartered in Scotts Valley, CA, USA, the company offers 837 products in their lineup. They hold 1 verified certifications including Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. No regulatory violations or FDA warning letters were found in our research.

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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.