Rugby Oysco 500 + Vitamin D Calcium Carbonate with Vitamin D for Bone Strength supplement bottle
Rugby

Oysco 500 + Vitamin D Calcium Carbonate with Vitamin D for Bone Strength

What We Researched
2 active ingredients analyzed · 15 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
62
Product Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D-3 (as cholecalciferol) 200.0 IU 50%
Calcium (as oyster shell) 500.0 mg 50%
Bioavailability Excellent

Absorption Rating

  • Vitamin D-3 (as cholecalciferol) Good
  • Calcium (as oyster shell) Good
Other Ingredients Very Poor

Fillers & Additives

  • Croscarmellose Sodium
  • Hypromellose
  • Microcrystalline Cellulose
  • Titanium Dioxide High
  • Soy Polysaccharide
  • Sodium Lauryl Sulfate Low
  • Talc High
  • Acacia
  • Mineral Oil Medium
  • Starch
  • Sucrose
  • FD&C Yellow #5 Medium
  • Fd&c Yellow #6. May Contain Corn Starch High
  • Magnesium Trisilicate
  • Silica And Pregelatinized Calcium Phosphate With Vitamin D (Cholecalciferol) And Vitamin K
Efficacy Fair

Dosage Analysis

  • Vitamin D-3 (as cholecalciferol) 200.0 IU Under-dosed
  • Calcium (as oyster shell) 500.0 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D-3 (as cholecalciferol) 200.0 IU 50%
Calcium (as oyster shell) 500.0 mg 50%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Microcrystalline Cellulose Safe

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

Titanium Dioxide Caution

Used as a whitening agent in tablet coatings and capsules.

Soy Polysaccharide Unknown
Sodium Lauryl Sulfate Caution

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

Talc Avoid

It is used to improve powder flow and prevent clumping.

Acacia Generally_safe

It is used as a binder or thickener.

Mineral Oil Caution

It is used as a lubricant or emollient.

Starch Generally_safe

It is used as a filler, binder, or thickener.

Sucrose Generally_safe

It is used as a sweetener.

FD&C Yellow #5 Caution

It is added to supplements to provide color.

Fd&c Yellow #6. May Contain Corn Starch Unknown
Magnesium Trisilicate Unknown
Silica And Pregelatinized Calcium Phosphate With Vitamin D (Cholecalciferol) And Vitamin K Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$11$10$9$8$7 $8.54
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
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Frequently Asked Questions
Is Rugby Oysco 500 + Vitamin D Calcium Carbonate with Vitamin D for Bone Strength a good supplement?

Rugby Oysco 500 + Vitamin D Calcium Carbonate with Vitamin D for Bone Strength received a product quality score of 62/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 2 active ingredients with 30 servings per container. Of the 15 inactive ingredients, 3 are rated safe and 4 are flagged for review.

What are the ingredients in Rugby Oysco 500 + Vitamin D Calcium Carbonate with Vitamin D for Bone Strength?

Rugby Oysco 500 + Vitamin D Calcium Carbonate with Vitamin D for Bone Strength contains 2 active ingredients: Vitamin D-3 (as cholecalciferol) (200.0 IU), Calcium (as oyster shell) (500.0 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Rugby Oysco 500 + Vitamin D Calcium Carbonate with Vitamin D for Bone Strength safe to take?

Rugby Oysco 500 + Vitamin D Calcium Carbonate with Vitamin D for Bone Strength has been analyzed for ingredient safety across all its components. Of 15 inactive ingredients, 3 are rated safe. 4 ingredients are flagged for review: Titanium Dioxide, Sodium Lauryl Sulfate, Mineral Oil. '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.