Antioxidant & Longevity · Immune · Skin Hair & Nails
Vitamin C 1,000 mg – 120 servings
✓90-DAY MONEY-BACK GUARANTEE
$29.99$0.24 PER SERVING
Vitamin C is water-soluble, so the body cannot store it and takes what it needs from each day's supply. This is the higher-strength option: a full 1,000 mg of ascorbic acid in one capsule, the exact amount printed on the label. One hundred and twenty capsules, four months at one a day.*
Supports immune function
Provides antioxidant protection
Supports collagen production
Supports skin and connective tissue
Supports bones, cartilage and blood vessels
The higher-strength option
THIRD-PARTY TESTEDcGMP FACILITYVEGAN CAPSULENON-GMOCOA PER LOTGLUTEN-FREE
How to take
Adults take 1 capsule daily with food, or as directed by a healthcare professional.. Consistency matters more than timing — pick a moment you'll remember daily.
Consult a healthcare professional before use if pregnant or nursing, taking medication, or if you have kidney stones, kidney disease, or another medical condition. Large amounts of vitamin C may cause digestive discomfort in some people. Keep out of reach of children.
Consult a healthcare professional before use if pregnant or nursing, taking medication, or if you have kidney stones, kidney disease, or another medical condition. Large amounts of vitamin C may cause digestive discomfort in some people. Keep out of reach of children.
Quality & testing
Manufactured in the USA in a cGMP-certified facility. Raw materials are tested and qualified before use, and every finished batch is verified by an independent lab for identity, potency, heavy metals, and microbials. Results publish on this page per lot.
Shipping & subscription
Subscribe at any frequency — every month, every 2 months or every 3 months — and save 10%. Subscribe to a second product and every subscription goes to 20%. Free shipping on subscriptions, and you can pause, skip or cancel anytime from your account — no phone calls, no hoops.
What it supports
+
Supports immune function
Vitamin C supports the normal function of the immune system, day to day.
+
Provides antioxidant protection
A water-soluble antioxidant that helps protect cells from oxidative stress.
+
Supports collagen production
Vitamin C is required for the body to synthesise collagen, the protein in skin, cartilage, bone and blood vessels.
+
Supports skin and connective tissue
Through its role in collagen formation, it supports skin, connective tissue and cartilage.
+
Supports bones, cartilage and blood vessels
Collagen built with vitamin C is structural to bone, cartilage and blood-vessel walls.
+
The higher-strength option
1,000 mg in a single capsule, twice the amount of our 500 mg, with the exact figure printed on the label.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Higher strength, one capsule.
Vitamin C (as Ascorbic Acid) 1,000 mg
| Vitamin C 1,000 mg | Vitamin C 1,000 mg, 60 ct | Low-dose multivitamins | |
|---|---|---|---|
| 1,000 mg per capsule | ● | ● | — |
| Exact amount on the label | ● | ● | Varies |
| 120 capsules per bottle | ● | — | Varies |
| COA published every lot | ● | — | — |
GENERAL FORM COMPARISON — INDIVIDUAL PRODUCTS VARY BY BRAND
What's happening
while you wait.
*INDIVIDUAL RESULTS VARY. THESE STATEMENTS HAVE NOT BEEN EVALUATED BY THE FDA.
Inside the formula
Vitamin C (as Ascorbic Acid) 1,000 mg
Vitamin C is an essential, water-soluble nutrient the body can neither make nor store, so what matters is what arrives each day. This is the higher-strength option in the range: 1,000 mg of ascorbic acid in a single capsule, for people who already know they want more than a standard serving. It supports normal immune function, works as a frontline antioxidant, and is required for the body to build collagen — the structural protein behind skin, cartilage, bone and blood vessels. Being water-soluble, what the body does not use it simply passes.
Frequently asked
questions
How do I know what's on the label is in the bottle?
Trust should be verifiable. Every batch we produce is tested by an independent laboratory, and the certificate of analysis for your exact lot is published on this page — potency, heavy metals, microbials. Testing begins the moment a raw material arrives, continues through production, and no batch is released until every result clears. The label is a claim. The COA is the proof.
How do you choose your ingredients and doses?
We formulate from peer-reviewed clinical research and dose to match it. We select the highest-grade material available for each ingredient, in the form the body absorbs best, and where a patented or branded form is the one that has actually been studied, that is the one we use. Every active appears at its exact amount, with no proprietary blends and nothing added that doesn't need to be there.
Where are CoreLabs supplements made?
In our own cGMP-certified facility in California's Central Valley. Manufacturing in-house means quality is our responsibility at every step rather than a supplier's promise. Raw materials are purchased through established US suppliers who import and qualify them, and every material is tested against our own specification before it enters production — wherever it originated.
Why are CoreLabs supplements more expensive?
Because of what goes in. We buy the highest grade of each raw material, in the most absorbable form, and we work with the branded and patented ingredient houses whose material the clinical research was actually run on — names like Lonza, Albion, RIBUS, Sabinsa and Indena. Wherever possible those materials are made domestically. Our capsules are titanium-dioxide free. Then it is made in our own facility and third-party tested batch by batch. Every one of those choices costs more than the alternative, and the price reflects it. Anyone can claim quality — we publish ours.
How is this different from your 500 mg?
Same ascorbic acid, twice the strength — 1,000 mg in one capsule rather than 500 mg. Both are 120 capsules at one a day. Pick by how much you want.
Is 1,000 mg a lot?
It is a higher-strength serving and well tolerated by most adults. Vitamin C is water-soluble, so what the body does not use it passes. Large amounts can cause digestive discomfort in some people, and anyone prone to kidney stones should check with a healthcare professional first.
When should I take it?
One capsule daily with food. Taking it alongside an iron supplement helps with iron absorption.
Does this contain bioflavonoids?
No. This is ascorbic acid on its own at 1,000 mg. Some vitamin C products add citrus bioflavonoids alongside it. If that combination is what you are looking for, this is not that product.