The custom GPT that told me to stop taking glycine | James Grant | Healthier Ep 2

Healthier: Building Health & Fitness Businesses · Feb 12, 2026 · 29m

James walks through how he built a custom GPT that knows his blood work, health goals, and red lines — and how it recently told him to stop taking glycine.

In this episode, you'll see:

- How to build a custom GPT that acts as your personal supplement advisor

- A prompting technique that compensates for gaps in your own knowledge

- Why stacking similar supplements can work against you (and how AI catches it)

- How to design 8-12 week experimental review protocols with pass/fail criteria

- When to default to your doctor and when AI is the better prep tool

Timestamps

00:00 Introduction

00:30…