C-Fence® (Sustained-Release Vitamin C — Nutriventia)

C-Fence® is a sustained-release vitamin C from Nutriventia, engineered to release gradually over about 12 hours for a 24-hour presence in the blood from a single daily dose. The slow release is designed to improve uptake and reduce the digestive upset of high-dose plain vitamin C.

C-Fence is researched primarily for Immune Support and Antioxidant. Vitamin C supports normal immune function and is studied for modestly reducing the duration of the common cold.

The clinically studied dose is Commonly providing a standard daily vitamin C dose in one sustained-release serving. Always follow the product label and check with a healthcare provider for personal advice.

For most healthy adults, C-Fence is well tolerated at studied doses. Reported effects can include: Generally well-tolerated. Very high doses can cause digestive upset or loose stools. It may also interact with some medications. C-Fence is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Possible interactions include: Generally compatible with medications. High-dose vitamin C can affect some lab tests; tell your doctor. If you take prescription medication, check with a pharmacist or doctor before using it.

NutraSmarts rates the evidence for C-Fence as Strong (4 out of 5). It is backed by 1 clinical trial and 1 cited reference summarized on this page. A higher rating reflects more, larger, and better-designed human studies.