Life Extension Buffered Vitamin C | 454.6 Grams Powder (Multi-Pack), supp.tips

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

A clearly labelled, substantial vitamin C serving in a buffered powder, but its fixed daily dose is high enough to exceed the US adult upper intake level.

Score before rubric limits: 87.5 / 100.

Scoring criteria

Quantity
100 / 100
The labelled routine supplies 4,000 mg vitamin C, a substantial supplemental amount that is adequate for the stated general supplementation role.
Form
85 / 100
The buffered mineral formulation reduces the acidity of vitamin C compared with unbuffered ascorbic acid, a relevant potential tolerability advantage for this drink.
Convenience
100 / 100
The directions specify one teaspoon daily, matching the 5.4 g serving; this is one measured powder portion per day.
Label accuracy
100 / 100
The matched panel gives consistent amounts for vitamin C and the listed buffer minerals, with no evident contradiction.
Purity
75 / 100
No product-specific purity testing or other evidence supporting an adjustment is supplied.
Cofactors
0 / 100
The declared calcium, magnesium, zinc and potassium are identified as buffering minerals, not as separately quantified complementary ingredients.