Heal Thy Self with Dr. G

I Tested My Fish Oil at Home (45% Chance Yours Is Already Rancid) | Heal Thy Self w/ Dr. G #490

June 4, 2026·9 min
Episode Description from the Publisher

There is a 45% chance the fish oil sitting in your cabinet right now is already oxidized. And rancid omega-3s do not just fail to help you. Research shows they generate pro-inflammatory byproducts that work against everything you are taking fish oil for. Dr. G breaks down exactly how this happens, how to test what is in your cabinet tonight with zero equipment, and what to actually look for before you buy another bottle. In this episode, you will learn:  • The two oxidation markers most brands count on you never knowing about, the peroxide value and the anisidin value, and the total oxidation score that tells you whether your fish oil is actually fresh  • Why the number on the front of your fish oil bottle is not the amount of omega-3s you are getting, and the simple math that reveals whether you have been underdosing for years  • The at-home test you can do right now with one capsule, a pin, and 30 seconds that will tell you immediately whether to keep your fish oil or throw it away Plus the specific brands that passed Dr. G's independent investigation for certificate of analysis standards, packaging, storage, meaningful EPA and DHA doses, and proper oxidation scores. Timestamps: 0:00 - Intro 1:00 - The George Washington University Study That Exposed What's on Shelves  1:46 - Peroxide Value, Anisidine Value & the TOTOX Score Explained  2:18 - Why Fish Oil Is One of the Most Chemically Fragile Supplements You Can Buy  3:10 - What Legitimate Brands Do to Protect Their Oil (And What to Look For)  3:39 - The Label Scam: 1,000mg of Fish Oil Is Not 1,000mg of Omega-3s  4:24 - What a Clinically Meaningful Dose of EPA and DHA Actually Looks Like  5:09 - Three Questions to Ask Any Fish Oil Brand Before You Buy  7:00 - How to Test the Fish Oil in Your Cabinet Right Now  8:08 - The Brands That Passed Dr. G's Investigation Learn more about your ad choices. Visit megaphone.fm/adchoices

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