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LABDOOR SCORE
81.5 of 100
Quality Rank 14 of 20

Value Rank 8 of 20

Ratings and Key Data

One serving of Kirkland Signature Extra Strength Vitamin D3 measured 2200 IU of vitamin D3, 10% over its label claim. Due to higher than claimed levels of vitamin D, two servings of this product also exceed the 4000 IU daily Upper Limit (UL) by 10%.

Label Accuracy
Product Purity
Nutritional Value
Ingredient Safety
Projected Efficacy
  • Analytical Tests 9
  • Serving Size 1 Tablet
  • Price/Serving $0.02
  • Vitamin D/Serving 2200 IU (as cholecalciferol/D3)
  • Watchlist Ingredients Caramel Color
  • Purity Tests Pass (heavy metal content below 1 PPM)