California Gold Nutrition Quercetin Plus with Quercetin, Vitamin C, Citrus Bioflavonoids, Bromelain, Turmeric and Vitamin C, 100 Tablets supplement bottle
California Gold Nutrition

Quercetin Plus with Quercetin, Vitamin C, Citrus Bioflavonoids, Bromelain, Turmeric and Vitamin C, 100 Tablets

What We Researched
6 active ingredients analyzed · 8 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
75
Product Score Fair
79
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as ascorbic acid) 250 mg 278%
Manganese (as amino acid chelate) 10 mg 435%
Quercetin 500 mg
Citrus Bioflavonoids 100 mg
Bromelain (1,800 GDU/g) (from Pineapple) 50 mg
Turmeric Extract (Curcuma longa) (rhizome) (Standardized to 95% Curcuminoids) 50 mg
Bioavailability Fair

Absorption Rating

  • Vitamin C (as ascorbic acid) Fair
  • Manganese (as amino acid chelate) Good
  • Quercetin Fair
  • Citrus Bioflavonoids Fair
  • Bromelain (1,800 GDU/g) (from Pineapple) Good
  • Turmeric Extract (Curcuma longa) (rhizome) (Standardized to 95% Curcuminoids) Poor
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Cellulose Gum
  • Silicon Dioxide (Silica)
  • Vegetable Stearin
  • Food Glaze
  • Magnesium Stearate
  • Calcium Silicate
  • Modified Cellulose
Efficacy Fair

Dosage Analysis

  • Vitamin C (as ascorbic acid) 250 mg Effective
  • Manganese (as amino acid chelate) 10 mg High
  • Quercetin 500 mg Effective
  • Citrus Bioflavonoids 100 mg Under-dosed
  • Bromelain (1,800 GDU/g) (from Pineapple) 50 mg Under-dosed
  • Turmeric Extract (Curcuma longa) (rhizome) (Standardized to 95% Curcuminoids) 50 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as ascorbic acid) 250 mg 278%
Manganese (as amino acid chelate) 10 mg 435%
Quercetin 500 mg
Citrus Bioflavonoids 100 mg
Bromelain (1,800 GDU/g) (from Pineapple) 50 mg
Turmeric Extract (Curcuma longa) (rhizome) (Standardized to 95% Curcuminoids) 50 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Cellulose Gum Safe

Thickens and stabilizes supplement formulations.

Silicon Dioxide (Silica) Generally_safe

It is used as a flow agent to prevent clumping and improve powder flow.

Vegetable Stearin Generally_safe

It is used as a lubricant or release agent in supplement manufacturing.

Food Glaze Generally_safe

It is used to improve the appearance and protect the supplement.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Calcium Silicate Safe

Prevents ingredient clumping during manufacturing.

Modified Cellulose Safe

Creates vegetarian capsule shells with controlled dissolution.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$35$34$33$32$31 Mar 12 $33.17
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
California Gold Nutrition

Founded 2013 · Irvine, California, United States · 406 products · californiagoldnutrition.com/

Transparency

5 claims
Third Party Testing Claim — Verified Source
Coa Availability — Verified Source
Testing Lab Disclosure — Claimed
In House Testing — Verified Source

Violation History

6 incidents
Recall California Gold Nutrition Daily Prenatal Multi, Ultamins Women's Multivitamin, and Ultamins Women's 50+ Multivitamin2025-06-26Source
Fda Warning Public health warning against the purchase and consumption of unregistered food supplement: CALIFORNIA GOLD NUTRITION Baby Liquid Vitamin D3.2025-01-10Source
Fda Warning Public health warning against the purchase and consumption of unregistered food product: CALIFORNIA GOLD NUTRITION Stabilized R-Lipolic Acid.2024-04-12Source
Fda Warning Public health warning against the purchase and consumption of unregistered food product: CALIFORNIA GOLD NUTRITION Silymarin Complex.2024-04-12Source
Fda Warning Public health warning against the purchase and consumption of unregistered food supplement: CALIFORNIA GOLD NUTRITION PQQ 20mg.2024-02-01Source
Fda Warning Public health warning against the purchase and consumption of unregistered food supplement: CALIFORNIA GOLD NUTRITION DAIRY ENZYMES.2019-09-26Source
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Frequently Asked Questions
Is California Gold Nutrition Quercetin Plus with Quercetin, Vitamin C a good supplement?

California Gold Nutrition Quercetin Plus with Quercetin, Vitamin C, Citrus Bioflavonoids, Bromelain, Turmeric and Vitamin C, 100 Tablets received a product quality score of 75/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 6 active ingredients with 100 servings per container. Of the 8 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, California Gold Nutrition, holds a brand trust score of 79/100.

What are the ingredients in California Gold Nutrition Quercetin Plus with Quercetin, Vitamin C?

California Gold Nutrition Quercetin Plus with Quercetin, Vitamin C contains 6 active ingredients: Vitamin C (as ascorbic acid) (250 mg), Manganese (as amino acid chelate) (10 mg), Quercetin (500 mg), Citrus Bioflavonoids (100 mg), Bromelain (1,800 GDU/g) (from Pineapple) (50 mg), Turmeric Extract (Curcuma longa) (rhizome) (Standardized to 95% Curcuminoids) (50 mg). Notable high-dose ingredients include Vitamin C at 278% DV, Manganese at 435% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is California Gold Nutrition Quercetin Plus with Quercetin, Vitamin C safe to take?

California Gold Nutrition Quercetin Plus with Quercetin, Vitamin C, Citrus Bioflavonoids, Bromelain, Turmeric and Vitamin C, 100 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 California Gold Nutrition a trustworthy supplement brand?

California Gold Nutrition receives a brand trust score of 79/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2013 and headquartered in Irvine, California, United States, the company offers 406 products in their lineup. Note: California Gold Nutrition has 6 historical regulatory incidents on record, which are factored into the trust score.

When to take digestive enzymes?

Timing can affect how well your body absorbs and utilizes supplements. As a general rule: fat-soluble vitamins (A, D, E, K) and omega-3s are best taken with meals containing fat. Water-soluble vitamins (B vitamins, vitamin C) can be taken anytime but are often recommended with breakfast. Minerals like calcium and magnesium may be better absorbed when split between meals. Iron absorbs best on an empty stomach but can cause nausea — taking it with vitamin C improves absorption while reducing stomach upset. Probiotics are often recommended on an empty stomach (before breakfast) for optimal survival through stomach acid. Consistency matters more than perfect timing — taking supplements at the same time each day helps build a reliable habit.

Do digestive enzymes make you poop more?

The effects of supplements on the body vary based on the specific ingredients, dosages, and individual factors. Quality clinical research is the best guide for understanding what supplements actually do versus marketing claims. Be cautious of products that promise dramatic results — legitimate supplements support health gradually, not overnight. Checking the ingredient label, understanding the dosages, and reviewing the scientific evidence are essential steps before starting any supplement. GoodSupp evaluates over 250,000 products based on published research and evidence-based criteria.

Do digestive enzymes help with bloating?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

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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.