Respond Immune Complex

product on market Tablet or Pill Sundown Organics 🟢 Safety: 100/100
Brand: Sundown Organics
🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 43% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

1 Tablet(s) Serving Size
Other Combinations Product Type
43% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
20 mg (22% DV)
10 mcg (50% DV)
✅ Within RDA (0.7× RDA of 0.015 mg) 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.01mg UL 0.1mg
5.5 mg (50% DV)
✅ Within RDA (0.5× RDA of 11 mg) 📚 258 studies (Tier A: 6, B: 134)
RDA 11mg This product: 5.5mg UL 40mg
27.5 mcg (50% DV)
✅ Within RDA (0.5× RDA of 0.055 mg) 📚 172 studies (Tier A: 0, B: 67)
RDA 0.055mg This product: 0.0275mg UL 0.4mg
35 mg
📊 Market median: 340.0mg (243 products) 📚 3 studies — no high-quality reviews
This product: 35mg
organic Shiitake Mushroom
35 mg
organic Maitake Mushroom
30 mg

Other Ingredients

Tapioca Dextrose Fermentation Blend organic Bamboo extract organic Rice extract Blend organic Safflower Oil organic Oats Maltodextrin organic Sunflower Lecithin organic Palm Oil organic Guar Gum

Label Claims — Verification

❓ Nutrient
❓ All Other
❓ Structure/Function
All Other (99% of products) Structure/Function (83% of products) Nutrient (54% of products)

Target Groups

Adult (18 - 50 Years) Organic Gluten Free Dairy Free

Product Information

📋 Directions for Use

Directions: For adults, take one (1) tablet daily, preferably with a meal.

Once daily

⚠️ Warnings & Precautions

As a reminder, discuss the supplements and medications you take with your health care providers.

Contains soy ingredients.

Warning: If you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use.

Discontinue use and consult your doctor if any adverse reactions occur.

Keep out of reach of children.

Tamper resistant: Do not use if seal under cap is broken or missing.

🧪 Formulation Notes

Nutrients incorporated into a Fermented Blend

Non-GMO No gluten No wheat No milk No lactose No artificial color No artificial flavor No artificial sweetener No preservatives No peanuts No tree nuts No fish Sodium free

Certified Organic by Quality Assurance International

Gluten free Dairy free Non-GMO

Stay strong with Vitamin C, D3 and Zinc plus Organic Mushrooms

Sundown believes in living clean...and being transparent. That's why you won't find genetically modified ingredients, gluten, wheat, dairy, lactose or artificial flavors in any of our products. Now, we're going one step further with our USDA Certified organic Supplements that are 100% free of synthetic dyes. Now there's a clean, organic choice you can feel good about.

Stay strong with our Respond Immune Complex containing key immune supporting Vitamins C and D3 along with Selenium and Zinc. Organic mushrooms Reishi, Shiitake and Maitake have been used fr their traditional health properties in Chinese and Japanese cultures for thousands of years.

USDA Organic

Additional Information

Store at room temperature and avoid excessive heat.

Tree-free carton Made from 100% sugar cane fiber Eliminates Wood-based processes Renewable resource Removes carbon dioxide from the atmosphere

Quality Assurance International Certified Organic

Made in the USA with select ingredients from around the world

Coated paper box US only how2recycle.info

USDA Organic

Organic, Clean Nutrition In a world of choice, living your best becomes a collaboration between you...and you. When your well-being is important, living clean is a conscious choice you make.

Product Details

DSLD Entry Date 2019-12-22
Product Type Other Combinations
Form Tablet or Pill
Brand Sundown Organics
DSLD ID 212235
Data Updated 2026-04-11

Research Evidence

371 Research Sources
54 Avg Quality Score
148 Meta Analysis
82 Systematic Review
71 Rct
62 Clinical Trial
2 Regulatory Source
1 Cochrane Review
1 Narrative Review
1 Other
1 Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
PubMed DOI Cochrane
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
PubMed DOI Cochrane
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
PubMed DOI Cochrane
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
PubMed DOI Cochrane
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
PubMed DOI Cochrane
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
PubMed DOI Cochrane
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
PubMed DOI
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024
PubMed DOI
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
PubMed DOI
View all evidence for Vitamin C →

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