The Anticancer Actions of IV Vitamin C: Mechanisms, Dosing, Safety Labs, and Integration with Oncology Care

Researched and written by Keith Bishop, Clinical Nutritionist, Cancer Coach, and Founder of Prevail Over Cancer™, and the Prevail Protocol™

High-dose intravenous vitamin C (IVC) has reemerged as a promising adjunctive therapy in integrative oncology. Modern research highlights its unique pharmacology, potential anticancer mechanisms, and its ability to support patients undergoing chemotherapy, radiation, and immunotherapy. This guide breaks down the science, dosing considerations, safety labs, and clinical integration—supported by peer-reviewed medical literature.

What Makes IV Vitamin C Different From Oral Vitamin C?

Oral vitamin C absorption is tightly limited by intestinal transporters, which cap blood levels even at high doses. In contrast, IV administration bypasses intestinal absorption and produces blood concentrations 100–500× higher than those required for a...

A science-backed breakdown of allulose, xylitol, and other metabolic sweeteners — and how they shape glucose, insulin, oxidative stress, and the metabolic terrain that affects cancer growth.

"Allulose and Cancer” Is Becoming a Key Question

Researched and written by Keith Bishop, Integrative Cancer Educator, Clinical Nutritionist, Cancer Coach, Founder of Prevail Protocol™ and Prevail Over Cancer™, and Retired Pharmacist

Cancer cells rely heavily on glucose uptake and glycolysis, even when oxygen is available — the hallmark Warburg effect.[i] Because of this metabolic preference, sweeteners that raise glucose and insulin can create a terrain more favorable to cancer progression, while sweeteners that stabilize metabolic pathways may support better outcomes.

Among all sweeteners, allulose is emerging as one of the most metabolically unique, with early research suggesting potential relevance to cancer metabolism.

This article provides a deep, evidence-based look at allulose and ca...