SFI Health Ester-C - 500mg of buffered, non-acidic Vitamin C for immune support.
SFI Health Ester-C - 500mg of buffered, non-acidic Vitamin C for immune support.

Klaire Labs/SFI Health

Ester-C®

$30.99

SIZE: 100 Capsules

*Free shipping applies to orders shipped within the Lower 48 States.


Free shipping on orders over $99.
SKU: KL2128 Categories: , , Tags: , , Product Brand:

The Promise

Product identity & formulation Buffered, non‑acidic Vitamin C in a hypoallergenic capsule

Patented Ester‑C® as calcium L‑ascorbate plus vitamin C metabolites in a vegetarian capsule; free of common allergens.

Ingredient identity

Ester‑C® (calcium L‑ascorbate) — a patented, non‑acidic form of vitamin C with vitamin C metabolites.

Amount per capsule

Each capsule provides 500 mg Vitamin C (as Ester‑C®) and 55 mg calcium (from calcium L‑ascorbate).

Formulation & delivery

Vegetarian hard capsule (hydroxypropyl methylcellulose) with microcrystalline cellulose, stearic acid, and silicon dioxide.

Dietary & quality facts

Hypoallergenic: free of milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten; no artificial colors, flavors, or preservatives.

Why It Works

Distinct formulation facts Concrete compositional and tolerance details that set this formula apart

Specific amounts, buffered form, and metabolite presence support gentler digestion and consistent dosing.*

01

Buffered with calcium

Vitamin C is present as calcium L‑ascorbate, which neutralizes acidity compared with ascorbic acid.

02

Exact potency

500 mg Ester‑C® per capsule (provides 556% Daily Value for vitamin C per serving).

03

Vitamin C metabolites included

Manufacturing process yields vitamin C metabolites alongside mineral ascorbates.

04

Capsule composition

Delivered in a vegetarian hydroxypropyl methylcellulose capsule with standard excipients.

Reviews

Customer Reviews

Your Journey

How to use & safety Clear directions, storage, and precautionary notes

Follow labeled dosing and consult a healthcare professional when indicated.

Serving

Suggested use

Take 1 capsule, 1 to 2 times daily with food or as directed by a healthcare professional.

Container details

Servings per container

Serving size: 1 capsule. Servings per container: 100.

Precautions

Consultation advised

If you are pregnant, nursing, have a medical condition, or are taking prescription drugs, consult your physician before using this product.

Storage & safety

Keep out of reach

KEEP OUT OF REACH OF CHILDREN. Contains no common allergens listed on label.

Product education

Ester-C®: Gentle, Buffered Vitamin C Support*

Ester-C® is a patented, non-acidic form of Vitamin C that is uniquely formulated to be gentle on the stomach. Created through a special process that results in a mixture of mineral ascorbates and vitamin C metabolites, this formula is an ideal choice for anyone who wishes to increase their intake of Vitamin C, especially those who have difficulty tolerating regular, more acidic forms of the vitamin. It provides powerful support for a healthy immune system and antioxidant protection.*

How It Works: A Patented, Non-Acidic Formula

This supplement delivers a buffered form of Vitamin C that is well-tolerated and easy for the body to digest.

Gentle on the Stomach
Standard ascorbic acid can sometimes cause gastrointestinal discomfort in sensitive individuals. Ester-C® is buffered with calcium, which neutralizes its acidity. This allows for comfortable digestion, even at higher doses, making it easier to maintain consistent supplementation.

Enhanced with Metabolites
The unique, patented process used to create Ester-C® results in the presence of vitamin C metabolites. These compounds are believed to help enhance the absorption and utilization of Vitamin C within the body, ensuring you get the full benefit of this essential nutrient for immune and antioxidant support.*

  • A patented, non-acidic form of vitamin C that is gentle on the stomach
  • Ideal for individuals sensitive to regular ascorbic acid
  • Provides powerful immune system and antioxidant support*
  • Features a unique mixture of mineral ascorbates and vitamin C metabolites
  • A clean, hypoallergenic formula free of common allergens

Supplement record

Review serving details and ingredients for this product.

Supplement Facts:
Suggested Use: Take 1 capsule, 1 to 2 times daily with food or as directed by a healthcare professional.
Serving Size: 1 Capsule
Servings Per Container: 100
Ingredient Amount %DV
Vitamin C (as calcium L-ascorbate) Ester-C®‡ 500 mg 556%
Calcium (as calcium L-ascorbate) Ester-C®‡ 55 mg 4%
Other ingredients: Vegetarian capsule (hydroxypropyl methylcellulose, water), stearic acid, microcrystalline cellulose, and silicon dioxide.
Warning If you are pregnant, nursing, have a medical condition, or taking prescription drugs, consult your physician before using this product. KEEP OUT OF REACH OF CHILDREN.
Allergy Information Free of the following common allergens: milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, and gluten. Contains no artificial colors, flavors, or preservatives.

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