The PK Protocol: IV Therapy for Complex Chronic Illness and Cellular Repair

Dr. Rev. Isabel Sharkar

Dr. Isabel Sharkar, NMD, is co-founder of Indigo Integrative Health Clinic in Washington, D.C., a thriving clinic that has been serving the local community in health restoration and body optimization for over a decade. Being in constant pursuit for truth and healing Dr. Isabel graduated in 2011 from Southwest College of Naturopathic Medicine as a Doctor of Naturopathic Medicine.

Author profile
Caroline Hoeffgen

Caroline serves as Chief Operating Officer of Indigo Integrative Health Clinic, where she drives the expansion of Indigo’s pioneering root-cause approach to medical care.

Drawing on her extensive experience as a Parsley Health provider, educator and board-certified Health Coach, Caroline combines operational leadership with clinical insight to advance Indigo’s mission of delivering transformative, personalized care.

Author profile

By Caroline Hoeffgen, COO, BCHC, JD | Reviewed by Dr. Isabel Sharkar, NMD | May 2026

Chronic illness is rarely just one problem. It's a cascade — damaged cells, overwhelmed detox pathways, neurological strain, and persistent inflammation feeding into each other.

The PK Protocol addresses all of it at the cellular level.

Key Takeaways

  • The PK Protocol is a specialized IV therapy centered on Phosphatidylcholine (PC) — a molecule essential for healthy cell membrane function
  • It supports detoxification, energy production, neurological health, and cellular repair simultaneously
  • Glutathione — the body's master antioxidant — is a key component, protecting cells from oxidative stress and supporting immune function
  • It is particularly beneficial for chronic fatigue, Lyme disease, mold toxicity, autoimmune conditions, and persistent inflammation
  • The protocol includes additional cofactors that support methylation, DNA repair, mood regulation, and brain and nerve function

What Is the PK Protocol?

The PK Protocol is a comprehensive IV therapy built around Phosphatidylcholine (PC) — a phospholipid that forms the structural foundation of every cell membrane in the body.

When cell membranes are damaged — through chronic infection, toxin exposure, inflammation, or oxidative stress — cellular communication breaks down. Nutrients can't get in. Waste can't get out. Energy production suffers. And the downstream effects ripple through every system in the body.

The PK Protocol repairs this foundation, restoring the cellular integrity that complex chronic illness quietly erodes.

Phosphatidylcholine: The Core of the Protocol

Phosphatidylcholine is the primary therapeutic agent in the PK Protocol. Here's what it does:

  • Cell membrane repair — Restores damaged membranes, improving cellular communication and function throughout the body
  • Detoxification support — Facilitates the removal of toxins from cells, reducing the burden on the liver and lymphatic system
  • Organ function — Supports improved function across multiple organs, with particular benefit for the brain and nervous system
  • Neurological repair — Helps rebuild and protect neurons, making it especially valuable for patients with neurological symptoms or cognitive decline

Glutathione: The Master Antioxidant

Glutathione is a critical component of the PK Protocol — and one of the most important molecules in the body for managing oxidative stress and immune function.

  • Cell protection — Neutralizes free radicals and reduces inflammation, protecting cells from ongoing damage
  • Detoxification — Enhances the liver's ability to process and eliminate harmful toxins
  • Immune support — Strengthens immune response, helping the body fight infections and recover more effectively

Glutathione levels are frequently depleted in patients with chronic illness, making IV replenishment particularly impactful.

Supporting Cofactors

The PK Protocol also includes a carefully selected combination of cofactors that work alongside PC and glutathione to support:

  • Energy production and mitochondrial function
  • Methylation and DNA synthesis and repair
  • Mood regulation and neurotransmitter balance
  • Brain and nerve function
  • Lipid synthesis and cellular communication
  • Gene regulation and epigenetic health

This is what distinguishes the PK Protocol from a single-nutrient IV — it addresses multiple interconnected systems simultaneously.

Who Is the PK Protocol For?

The PK Protocol is particularly well-suited for individuals dealing with:

  • Chronic fatigue and low energy that hasn't responded to other interventions
  • Neurological symptoms — brain fog, memory issues, cognitive decline
  • Lyme disease and co-infections
  • Mold toxicity and environmental illness
  • Autoimmune conditions and persistent inflammation
  • Detoxification challenges and toxic burden

If you've tried other approaches without meaningful improvement, cellular-level repair may be the missing piece.

Final Thoughts

Complex chronic illness requires a complex solution — one that addresses root causes rather than managing symptoms in isolation.

The PK Protocol does exactly that: restoring the cellular foundation that chronic illness disrupts, supporting the body's own capacity to detoxify, repair, and heal.

If you're living with a condition that conventional medicine hasn't been able to resolve, the PK Protocol may be worth exploring.

Book a free Discovery Call

Questions? Reach us at discovery@indigohealthclinic.com or (202)840-6622, Monday–Friday, 9AM–5PM EST.

Medical Disclaimer

This content is provided by Indigo Integrative Health Clinic for educational purposes only. It does not constitute medical advice, a diagnosis, or a treatment recommendation, and does not establish a provider-patient relationship. Individual health conditions vary — information presented here may not apply to your specific situation. Always consult a qualified, licensed healthcare provider before making decisions about your health, medications, supplements, or treatment plan.

Featured in
Related articles

Continue reading

View all articles

Lyme disease shares key symptoms with fibromyalgia, multiple sclerosis, and chronic fatigue syndrome, so it can be mistaken for any of them. It is also over-diagnosed in people who do have one of those conditions. The honest answer is that Lyme is worth confirming or ruling out with a knowledgeable clinician, not assumed in either direction.

Most people leave a Hashimoto's diagnosis with a prescription and no explanation for why it started. You are told your immune system is attacking your thyroid, and that you will likely take levothyroxine for life. What you are rarely told is why this started now, when other people carry the same risk genes and never get sick.

Scientists at MIT engineered mice that fight off Lyme and pass that protection to their pups. In a 2026 study, ticks that fed on these mice picked up almost no Lyme. It is a real step toward fewer infected ticks, but it does little for anyone who already has it.