Ester-C®

Single Vitamin & Mineral

Brand: Klaire Labs

CapsuleSingle Vitamin and MineralOff Market

Product label for Ester-C — Click to view full label

Net Contents

100 Vegetarian Capsule(s)

Serving Size

1 Capsule(s)

Servings Per Container

100

Supplement Form

Capsule

Bar Code (UPC/SKU)

8 28054 00212 8

Product Version

ETC rev180118.06

Label Analysis

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

2Active Ingredients

2 distinct active ingredients are disclosed in Supplement Facts.

100%Amount Transparency

Every active ingredient discloses a specific amount per serving.

2% Daily Value Coverage

2 ingredients report a %DV; 1 meet or exceed 100% DV.

1Dietary Attributes

Label states: Gluten-Free.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen Guide

Contains

Milk
Egg
Fish
Shellfish
Tree Nuts
Peanut
Wheat
Soy
Gluten

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Supplement Facts

Serving Size: 1 Capsule(s) · 1–2 per day

Ingredient	Amount Per Serving	% Daily Value
Ester-C(Vitamin C)	500 mg	556%
Ester-C(Calcium)	55 mg	4%

Not Present

Other Ingredients

Vegetarian CapsuleMicrocrystalline CelluloseL-LeucineSilicon Dioxide

Target Groups

Adult (18 - 50 Years)Gluten FreeDairy Free

Label Claims

NutrientAll Other

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

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

Warnings & Precautions

Precautions re: Pregnant or Nursing or Prescription Medications

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

Precautions re: Children

Keep out of reach of children.

Precautions re: All Other

Do not use if shrinkwrap is broken or missing.

Storage

Store in a cool, dry place (59 degrees F - 85 degrees F) away from direct light.

Formulation

Formulation re: Does NOT Contain

Free of the following common allergens: Milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, and soybeans. Contains no artificial colors, flavors, or preservatives.

Formula re: Contains

Ester-C calcium ascorbate is a non-acidic form of vitamin C manufactured by a unique water-based process that combines calcium with vitamin C. This process creates a patented mixture of mineral ascorbates and vitamin C metabolites.

Formulation re: Other

Produced under a strict quality management system in compliance with Good Manufacturing Practices (GMPs) and third-party quality certifications.

FDA Statements

FDA Statement of Identity

Vitamin C Supplement

Other Label Statements

Brand IP Statement(s) re: (c), (TM), (SM)

Ester-C and Ester-C are registered trademarks of the Ester-C Company. U.S. patent Nos. 6,878,744 and 6,197,813.

Brand IP Statement(s) re: (c), (TM), (SM)

SFI

Manufacturer & Distributor

Manufacturer

SFI USA

Reno, NV, 89521

Market Reference

$6.59 – $274.20· 40 listings

SFI Health Ester-C 100 Capsules
Village Green Apothecary5.0(5)
$30.99
SFI Health Ester-C Bio 100 Capsules
SFI Health5.0(2)
$40.99
Ester-C
SFI Health
$30.99
Klaire Labs Ester-C Bio - Buffered Vitamin C with Bioflavonoids Rutin & French Maritime Pine Extract - Immune & Antioxidant Support - Hypoallergenic (
GoSupps.com5.0(5)
$89.99
Klaire Labs Multi-Element Buffered C
Pine Street Clinic4.9(13)
$59.99
10 x Ester C Bio 100 capsules - SFI Health/Klaire Labs
Naturitas5.0(1)
$274.20
Klaire Labs Ester-C Bio 100 Count
OVitaminPro.com5.0(2)
$40.99
Klairs Freshly Juiced 35 ml
YesStyle.com4.7(22000)
$13.69

Where to Buy Locally

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

LeSante Nutrition
5.0 (6)
Vitamin & supplements store
70 SW Century Dr #100-403, Bend, OR 97702
Directions (541) 414-3336
Ascension-rx
5.0 (1)
Vitamin & supplements store
105 SW Hayes Ave C, Bend, OR 97702
Directions (541) 306-6757
Earth Angel Wellness
5.0 (42)
Vitamin & supplements store
525 Glen Creek Rd NW #230, Salem, OR 97304
Directions (503) 558-3776
Helios Farms LLC
4.3 (12)
Farm
2077 Skelly S Rd, Yoncalla, OR 97499
Directions (541) 908-0561
Walgreens
2.9 (156)
Vitamin & supplements store
124 Lancaster Dr SE, Salem, OR 97317
Directions (503) 428-5004
CVS
3.7 (3)
Vitamin & supplements store
1514 SW Highland Ave, Redmond, OR 97756
Directions (541) 548-6041
True Health DPC
4.9 (59)
Doctor
106 McClaine St, Silverton, OR 97381
Directions (503) 523-0268
CVS
2.7 (7)
Vitamin & supplements store
1900 NE 3rd St #111, Bend, OR 97701
Directions (541) 389-1717

Research & Studies

Determination of plasma and leukocyte vitamin C concentrations in a randomized, double-blind, placebo-controlled trial with Ester-C®
SH Mitmesser, Q Ye, M Evans, M Combs - Springerplus, 2016 - Springer
… of vitamin C in plasma (reflective of recent intake) and leukocytes (reflective of tissue stores and influences on immune function) from a novel vitamin C formulation, Ester-C ® . …
201663 citations
Enhanced Vitamin C delivery: A systematic literature review assessing the efficacy and safety of alternative supplement forms in healthy adults
PC Calder, RB Kreider, DL McKay - Nutrients, 2025 - mdpi.com
… Commercially available oral supplemental forms of vitamin C alternative to conventional ascorbic acid include Ester C ® , which is a combination of calcium ascorbate and vitamin C …
202520 citations
Clinical Resources
M our Board - Children - community.napnap.org
… of other symptoms) that persists >3 days should be evaluated by your health care provider. … a healthy body as well as combating diarrheal illnesses. Brands that we trust: Klaire Labs …
Thyroid Pharmacist
WCH Loss - thyroidpharmacist.com
… Ester-C, a natural, water soluble version of Vitamin C, is added to increase intestinal … Although I believe that healthy hair comes from within, external factors, such as the shampoo that …

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2022-06-16. DSLD Label ID: 264870. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.