How to Build an Unstoppable Immune System
Find the gaps in your immune routine. Give each layer a job.
Drop your email and I’ll send you the guide.
Run your supplements through a five-question screen. See where they overlap and what the evidence says before buying another bottle.
Here’s what you get.
- 01
The five-question screen
Run any product through it. If you cannot name the gap it fills, it has not earned a place.
- 02
Start with the question
Match the problem you actually have to the layer that addresses it, instead of buying all five.
- 03
Three decisions, not five purchases
What the plan looks like when it works: fewer products, each with a job and a review date.
THE CORE IDEA
You do not need more “boost.” You need every layer covered.
A strong immune strategy is a system: good inputs, intact barriers, clear signals, fast recognition, and adaptive memory. The guide turns that system into decisions you can use.
Look inside first
Three real pages, before you give an email.
No sign-up to see these. They are unedited pages from the 26-page PDF, so you can judge the guide instead of a cover.
The five-question screen
Run any product through it. If you cannot name the gap it fills, it has not earned a place.
Start with the question
Match the problem you actually have to the layer that addresses it, instead of buying all five.
Three decisions, not five purchases
What the plan looks like when it works: fewer products, each with a job and a review date.
THE FIVE-LAYER MAP
26 PAGES- 01
Signal
Zinc
Immune-cell development and coordination.
- 02
Command
Vitamin D3
Receptor-driven control of immune genes.
- 03
Gut wall
Butyrate
Barrier fuel and regulatory signaling.
- 04
Front door
Lactoferrin
Mucosal defense and iron control.
- 05
Scouts
AHCC
A standardized extract studied for dendritic-cell activity.
MORE THAN A LIST
Build it. Buy it. Track it.
The PDF goes beyond the five supplements and shows how to use the idea as an actual decision system.
- The foundation that comes before supplements
- Forms and label details that change the product
- A one-job-per-layer pairing system
- A 30-day setup with evidence-matched review windows
- A baseline-versus-sick-day distinction
- Twenty-one linked papers and official sources
GET THE FIELD GUIDE
Know what your immune routine is missing.
Use the five-layer checklist to choose your next step and give every product a clear job.
Honest fit
Who this helps, and who should skip it.
Worth your time if
- You have a shelf of immune products and no idea which ones overlap.
- You want to know what comes before supplements.
- You want a review date attached to each thing you try.
Skip it if
- You want a stack to buy today. The guide is built to talk you out of most of it.
- You want dosing prescriptions. Study amounts here describe research, not a plan for you.
Before you download
The questions people actually ask.
Is this five supplements you want me to buy?
The opposite. There is no affiliate link, no product pick, and a page that says so directly. The five-question screen exists to cut products, and the worked example ends with three decisions rather than five purchases.
Why is there no recommended brand?
Because I have not found one worth naming for this category yet. The guide gives you the screen I would use instead, covering form, dose transparency and what the label hides.
Does "unstoppable" mean it prevents illness?
No, and the guide is blunt about it. It separates baseline support from sick-day use, and it says plainly that a symptom-day count over one month is not proof of prevention.
Why is it free?
Because I want more people running careful experiments on themselves, and because some readers eventually become Rebody Health customers. That is the whole model. No upsell arrives with the guide.
What happens to my email address?
You get the guide, then AI Biohacking, which is what I am testing and measuring on myself. You also get the revised guide whenever the research changes. One click unsubscribes and the address is never sold or shared.
What you are getting
1,000+ people already have this guide.
- 26 pages
- 21 linked papers
- Five-question product screen
- 30-day setup with review windows
- Last checked
- October 4, 2026. I recheck the papers behind each layer, and revise the guide when the evidence changes.
- When it changes
- The revised guide goes to everyone on the list. You do not have to come back for it.
- Who wrote it
- Nick Locascio. AI entrepreneur, founder of Rebody Health, co-founder of Booth AI (YC). My health experiments are personal experience, not medical advice. See the work behind it.
The rest of the field guides
Every one is free, and built the same way.
This is an educational decision guide, not individualized medical care. Study amounts describe research; they are not personal prescriptions.