🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • Limited research evidence available for ingredients
B Label Compliance Grade

Product Label

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Label Data

1 Vegetable Capsule(s) Serving Size
30 Servings
Other Combinations Product Type
0% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
200 mg (222% DV)
N-Acetyl-L-Cysteine
100 mg
Porcine Kidney, Powder
300 mg
📊 Market median: 200.0mg (198 products) 📚 6 studies — no high-quality reviews
This product: 100mg
Stinging Nettle Root Extract
50 mg
100 mg
📊 Market median: 200.0mg (136 products) 📚 3 studies — no high-quality reviews
This product: 100mg

Other Ingredients

Cellulose Microcrystalline Cellulose Ascorbyl Palmitate Silicon Dioxide

Label Claims — Verification

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

Target Groups

Adult (18 - 50 Years) Gluten Free Dairy Free

Product Information

📋 Directions for Use

Suggested use: Take one to two capsules no more than 15 minutes before the consumption of histamine-rich foods, or take as directed by your healthcare practitioner.

⚠️ Warnings & Precautions

G.I. Hist Support does not manage or address antibody-related food allergies.

Caution: Consult your healthcare practitioner before use, especially if you are pregnant or nursing.

Keep out of reach of children.

Avoid if allergic to pork or any other ingredient. This formula is not effective for symptoms of immune-related food allergies, such as peanuts, shellfish, etc., or for gluten intolerance due to sensitivity or celiac disease.

Professional use only

🧪 Formulation Notes

G.I. Hist Support is a formula designed to assist patients who have trouble processing external sources of histamines from foods and nutritional elements. This formula especially helpful for those with genetic weaknesses of A01C (Diamine Oxidase), the main enzyme responsible for the degradation of ingested histamine. Each ingredient is clinically tested to assist with histamine degradation and the oxidative stress created by histamines.

Free of: Wheat, gluten, yeast, soy, dairy products, fish, shellfish, peanuts, tree nuts, egg, ingredients derived from genetically modified organisms (GMOs), artificial colors, artificial sweeteners, or artificial preservatives.

Supports healthy degradation of food-derived histamine Professional Grade

Additional Information

Storage: Keep lid tightly closed and in cool, dry area.

GMP Good Manufacturing Practices Consistent Quality

Exclusive Formula

Product Details

UPC / SKU 8 58104 00616 5
DSLD Entry Date 2025-03-25
Product Type Other Combinations
Form Capsule
DSLD ID 327675
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
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
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
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
View all evidence for Vitamin C →

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