Rugby Oyster Shell Calcium 500mg Tablets supplement bottle
Rugby

Oyster Shell Calcium 500mg Tablets

What We Researched
· 10 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
86
Product Score Good

Product Analysis

Transparency Fair

Supplement Facts

No supplement facts data available.

Bioavailability N/A

Absorption Rating

No ingredient forms matched our reference database.

Other Ingredients Good

Fillers & Additives

  • Acacia
  • Maltodextrin
  • Croscarmellose Sodium
  • Microcrystalline Cellulose
  • Hypromellose
  • Soy Polysaccharide
  • Polydextrose
  • Titanium Dioxide High
  • Sodium Lauryl Sulfate Low
  • Talc And Triglycerides
Efficacy N/A

Dosage Analysis

Dosage data not available for assessment.

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Acacia Generally_safe

It is used as a binder or thickener.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Soy Polysaccharide Unknown
Polydextrose Generally_safe

It is used as a filler, to add bulk, and as a prebiotic fiber.

Titanium Dioxide Caution

Used as a whitening agent in tablet coatings and capsules.

Sodium Lauryl Sulfate Caution

It is used to help mix oil and water-based ingredients.

Talc And Triglycerides Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$12$11$10$9$8 $10.34
Target

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

Brand Trust Report
Rugby

Founded 1961 · Livonia, Michigan, USA · 135 products · majorrugby.com/

Transparency

1 claim

Violation History

4 incidents
Recall All liquid products manufactured by PharmaTech LLC and distributed by Rugby Laboratories2017-08-10Source
Recall Rugby Natural Iron Supplement tablets2013-01-17Source
Recall Rugby Children's Pain & Fever Concentrated Drops (Acetaminophen Drops)2011-07-21Source
Lawsuit Failure to have an effective system to identify and report suspicious orders of controlled substances.2011Source
Related Supplements
Frequently Asked Questions
Is Rugby Oyster Shell Calcium 500mg Tablets a good supplement?

Rugby Oyster Shell Calcium 500mg Tablets received a product quality score of 86/100 in GoodSupp's independent analysis, indicating strong overall quality. Of the 10 inactive ingredients, 3 are rated safe and 2 are flagged for review.

Is Rugby Oyster Shell Calcium 500mg Tablets safe to take?

Rugby Oyster Shell Calcium 500mg Tablets has been analyzed for ingredient safety across all its components. Of 10 inactive ingredients, 3 are rated safe. 2 ingredients are flagged for review: Titanium Dioxide, Sodium Lauryl Sulfate. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

What is magnesium good for?

Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

How much magnesium per day?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What is zinc good for?

Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

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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.