Some patients do everything right
and still don't get better.

You've tried adjusting medications, optimizing the diet, and ordering every relevant lab. But the patient sitting across from you is still stuck.

You know exactly which ones. The one whose fasting glucose won't budge despite being on metformin and eating well. The one whose inflammatory markers stay elevated no matter what you prescribe. The one with an autoimmune condition that keeps progressing despite standard therapy.

These patients aren't stuck because they're non-compliant or because you missed something. They're stuck because their physiology needs an intervention that was never part of your training. That intervention is therapeutic fasting.

Fasting has clinical evidence spanning nearly every major specialty. Here's a partial look at the data.

Metabolic disease

In a randomized trial of T2DM patients, 47% achieved diabetes remission after 3 months of an intermittent fasting protocol, with the majority sustaining remission at 12 months.

Yang et al., Journal of Clinical Endocrinology & Metabolism 2023

Cardiovascular disease

In a 10-week alternate-day fasting trial, LDL cholesterol dropped by up to 25%, triglycerides fell by up to 32%, and LDL particle size shifted toward larger, less atherogenic particles.

Varady et al., European Journal of Clinical Nutrition 2013

Chronic inflammation

Alternate-day fasting has reduced hs-CRP by up to 48% in clinical trials.

Razavi et al., International Journal of Vitamin and Nutrition Research 2021

Autoimmune and immune dysfunction

In a randomized trial of 97 patients with Crohn's disease, three monthly cycles of a fasting-mimicking diet produced clinical response in 69% and remission in 65%.

Kulkarni et al., Nature Medicine 2026

Cancer

In the DIRECT trial, a fasting-mimicking diet during neoadjuvant chemotherapy tripled the odds of radiological response and quadrupled the odds of near-complete pathological response.

de Groot et al., Nature Communications 2020

Neurological disease

In a pooled analysis of fasting and epilepsy, 61% of patients remained seizure-free during fasting periods, with reductions in focal and myoclonic seizure frequency.

Epilepsy & Behavior 2026, systematic review and meta-analysis

"The best outcomes don't come from adjusting the prescription or ordering more labs. They come from reaching the layer of physiology that neither one touches. That's what fasting does."

Why one intervention reaches so many conditions

Fasting works because it acts on physiology that sits upstream of most chronic disease.

01 Metabolic switching from glucose to ketone body utilization

02 Autophagy and clearance of dysfunctional proteins and organelles

03 Immune cell turnover via hematopoietic stem cell activation

04 Mitochondrial biogenesis and selective mitophagy

These aren't disease-specific effects. They're foundational physiology that influences how nearly every chronic condition progresses. That's why the evidence shows up in so many different places. But knowing fasting works isn't the same as knowing how to use it. That's what this playbook gives you.

What's inside the playbook

Clinical Framework

When fasting belongs in the treatment plan and when it doesn't

Six clinical indications where fasting adds something no dietary modification can replicate. Not disease categories. Clinical situations you'll recognize from your own patient panel, each one mapped to the reasoning that justifies adding fasting to their plan.

Patient Selection

Contraindications, caution criteria, medication red flags, and a pre-prescribing checklist

Six absolute contraindications. Fourteen caution populations with specific action-before-starting guidance for each, including detailed SGLT2 inhibitor management. A medication red flags table. Nine termination criteria. A pre-prescribing checklist you can run through before starting any patient on any protocol.

Modality Selection

The modality depends on severity and patient capacity, not the diagnosis.

A three-tier framework matched to the depth of intervention needed, plus an evidence reference table grading the data for ten clinical goals so you know exactly how much confidence to bring to the conversation.

Protocols

Parameter tables for every modality. Ready to prescribe.

Each protocol is built as a clinical reference table: what to set, what to monitor, what to adjust, and what to tell the patient. Includes circadian timing guidance, medication adjustment protocols, and electrolyte supplementation tiered to the intensity of the fast.

Lab Panel

The lab panel to order before and after every fasting intervention

A standard panel for every fasting patient and an extended panel for higher-intensity protocols. Includes draw timing, markers that fasting predictably alters and how to interpret them, and reassessment intervals matched to each modality.

Andrew Reid

I built Medgeeks in 2013 to help clinicians navigate the cases that standard training doesn't prepare you for. Over 10,000 clinicians have purchased our frameworks because they're built on primary literature, not simplified guidelines. This playbook came out of the same process, and it's what I teach clinicians and what I use in practice.

Physician Assistant (UC Davis) · Personalized Nutrition (UConn) · Precision Nutrition (UConn) · Dietetics (Cal State LA) · Founder, Medgeeks (2013)

Some patients do everything right and still don't get better.