Life Extension Buffered Vitamin C Powder 454 Grams

Brand: Life Extension
Category: Vitamin C
Recorded price: $34.99; 7 Sep 2026
Price per serving: $0.42

Supplement facts

Serving size: 5.4 Gram(s)
Servings per container: 84

Ingredient	Amount per serving	% daily value
Vitamin C	4000 mg	4,444%
Calcium	145 mg	11%
Magnesium	55 mg	13%
Zinc	2 mg	18%
Potassium	365 mg	8%

Other ingredients

None

Directions on the label

Read the entire label and follow the directions carefully prior to use. Directions: Mix one (1) teaspoon of BUFFERED VITAMIN C POWDER into a glass of water. Wait for the fizz to stop before consuming. The minerals buffer out the normally acidic vitamin C to make a pleasant tasting drink.

Label data from the Dietary Supplement Label Database.

Label data as of 10 Sep 2026

Product score

50 / 100Fair

Category average: 83.2 / 100
Average for similar products: 60.6 / 100

This jar supplies a substantial vitamin C serving in a buffered powder, but its directed 4,000 mg daily serving is at least twice the adult vitamin C UL.

Score before rubric limits: 82.5 / 100.

Scoring criteria

Quantity
100 / 100
The directed serving provides 4,000 mg of vitamin C, an ample supplemental amount for the stated general role.
Form
85 / 100
Buffered vitamin C is less acidic than ordinary ascorbic acid, a recognized practical tolerability advantage, though no special absorption advantage is established.
Convenience
100 / 100
The directions specify one teaspoon daily, matching the 5.4 g serving and the 84 servings per container.
Label accuracy
100 / 100
The listed vitamin C and mineral amounts are consistent with the stated serving and directions.
Purity
75 / 100
No specific purity controls or product-specific contamination concerns are provided.
Cofactors
0 / 100
The listed minerals serve as buffering constituents rather than separately quantified complementary ingredients.