Banned 45 Years Ago, Still in Your Body: The Truth About PCBs

Banned in 1979. Still in your food. Here's how to clear it.

The United States banned polychlorinated biphenyls (PCBs) in 1979.

They're still in your fish. Your dairy. Potentially your furniture. They never left.

I didn’t come to this as an academic exercise. CIRS, a toxin-triggered autoimmune condition, forced me to learn about environmental toxins fast. PCBs were one of the first things I found.

The EPA classifies them as probable human carcinogens, linked to thyroid dysfunction, weakened immunity, heart disease, type 2 diabetes, and lower IQ in children exposed before birth.

The frustrating part?

Many people living a genuinely healthy lifestyle are still consuming them every week without knowing it.

Here’s what’s actually going on — and what you can do about it.

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Why Is a Banned Chemical Still Everywhere?

How does a chemical banned over forty years ago still end up in your body?

It comes down to three things.

Persistence. PCBs don’t break down like organic material. They cycle between air, water, and soil and just keep going. Their chemical structure resists natural breakdown. Some linger in the environment for a century.

Bioaccumulation. A small fish eats contaminated plankton. A bigger fish eats that small fish. Each step up the food chain, the PCB concentration multiplies. By the time it reaches your plate, the levels have compounded through the entire food chain. That process is called bioaccumulation.

Slow clearance. Once PCBs are in your body, they don’t leave fast. They store in fat tissue and take years to clear. You can’t fast your way out of this in a week. But there are real things you can do. I’ll share them below.

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What PCBs Actually Do to Your Body

Here’s the part that got my attention when I was deep in my CIRS research.

PCBs don’t just cause one problem. They disrupt multiple systems at once.

A 2022 review in PMC laid it out clearly: thyroid disruption, liver and kidney damage, neurological deficits, immune suppression, and connections to heart disease, obesity, and type 2 diabetes.

For anyone dealing with chronic fatigue, mystery inflammation, or an autoimmune condition, this isn’t a theoretical risk. It’s likely a contributing factor.

The immune system angle hit me hardest.

Animal studies link PCBs to autoimmune disorders. In humans, higher PCB exposure correlates with higher autoantibodies. Those are the markers that show up in conditions like Hashimoto's thyroiditis and type 1 diabetes.

— Dr. Joseph Pizzorno, Founder of Bastyr University & author of The Toxin Solution

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The Biggest Sources in Your Diet

01 — Farmed salmon.

This one stings because salmon is supposed to be a health food.

But it’s the farming process, not the fish itself, that’s the problem.

A landmark 2004 study in Science analyzed over two metric tons of farmed and wild salmon globally. Farmed Atlantic salmon had nearly 8 times more PCBs than wild-caught.

How it works: Farmed salmon eat fishmeal pellets made from smaller ocean fish. Those fish absorb PCBs from contaminated water. The PCBs concentrate in the oil. The salmon eat the pellets and store the PCBs in fat. Then you eat the salmon.

Worth knowing: Norwegian monitoring data from 2006 to 2021 shows PCB levels in farmed salmon have declined as the industry shifted toward more plant-based feed. Progress is real. But contamination still exists, and sourcing still matters, especially in the U.S. market.

02 — Non-organic dairy, beef, and chicken.

Same logic applies. Conventional feed can carry PCB contamination. The fat in conventional animal products concentrates whatever is in that feed. Eating regular dairy and meat every day means a steady, low-level PCB drip at every meal.

03 — Your building.

Older buildings, especially those built before 1980, may have PCBs in caulking, paint, fluorescent light ballasts, and sealants. If you live in or are renovating an older home, this is worth knowing.

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What to Actually Do About It

The goal isn’t a sterile, panicked life.

It’s reducing your total toxic load by making a few strategic swaps.

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Step 01 — Upgrade Your Seafood

Wild-caught fish is a better starting point than conventional farmed. But sourcing still matters within that category.

I’ve been eating Seatopia for months.

They third-party lab test every fish for heavy metals, PCBs, and other contaminants, and their regenerative aquaculture model skips the artificial dyes and contaminated fishmeal.

You can actually see what’s in your fish before you order. The quality is genuinely exceptional. My girlfriend usually hates seafood. Now she’s practically addicted to their shrimp.

For verified wild-caught Alaskan salmon, Vital Choice is a reliable source.

02 — Filter Your Water

PCBs show up in water supplies near industrial sites, old infrastructure, and agricultural runoff.

A reverse osmosis filter handles PCBs, PFAS, heavy metals, and pesticides in one move.

If you spend money on one household upgrade this year, this is it.

I use Aquatru. Here’s why it stands out:

• Certified to NSF standards to remove 84 contaminants including PFAS, lead, fluoride, microplastics, and pesticides

• Third-party Tap Score lab rating: 96 out of 100

• Costs $0.12 per gallon — cheaper than bottled water

• One set of filters replaces 4,500 plastic water bottles

• No plumbing required — plug-and-play setup

• Remineralizes the water after filtering, which matters for hydration and energy production

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Step 03 — Source Cleaner Meat and Dairy

Same bioaccumulation logic applies to meat and dairy.

Conventional feed carries PCB contamination. The fat in those animal products concentrates whatever is in the feed.

Few brands I trust:

• Force of Nature — Regenerative agriculture standard. Zero pesticides or synthetic chemicals anywhere in the supply chain. Some of the cleanest beef available.

• Frankie’s Free Range Meats — Pasture-raised, free-range, and transparent about sourcing.

• Local regenerative dairy — Find a farm near you if you can. At minimum, go organic. The goal is simple: break the contaminated-feed cycle at the source.

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Step 04 — Sweat Regularly

Research confirms that PCBs, flame retardants, phthalates, and pesticides can all be excreted through sweat. Saunas, vigorous exercise, and hot yoga all help move PCBs out of fat tissue. Infrared saunas in particular are studied for their role in clearing fat-soluble toxins.

They're one of the most accessible and affordable detox tools available, and the benefits go way beyond detox. Better sleep, improved skin, muscle preservation.

I’ve written a full breakdown on saunas here

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Step 05 — Rethink Your Furniture

Older foam furniture, especially pieces made before 2015, may contain legacy flame retardants linked to PCB-like compounds.

Ben Greenfield, one of the most thorough biohackers out there, uses Essentia mattresses. They’re made from organic natural memory foam, GOTS-certified cotton, and zero toxic adhesives. If you want to go deep on your sleep environment, that’s where I’d start.

For the rest of your furniture, look for GREENGUARD Gold certification. That standard confirms low chemical emissions and rules out the worst flame retardants.

Avocado and Medley are both solid brands that meet it.

You don’t have to replace everything at once. Start with where you spend the most time: your bed.

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Quick Recap — Your PCB Reduction Checklist

01. Swap your seafood. Choose wild-caught over farmed. Seatopia and Vital Choice are the two I trust most.

02. Filter your water. Get an RO system. Aquatru removes 84 contaminants, costs $0.12/gallon, and needs zero installation.

03. Clean up your meat and dairy. Force of Nature, Frankie’s Free Range, local regenerative farms. Skip the conventional fat.

04. Sweat more. Infrared sauna is the highest-leverage option. Hot yoga and intense exercise work too. PCBs leave through fat-bound sweat.

05. Upgrade your sleep environment. Start with your mattress. Essentia for non-toxic organic. Look for GREENGUARD Gold on everything else.

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The Bottom Line

PCBs were banned before most of us were born.

They’re still showing up in your food, your water, and your body, and they were one I never even thought about until my health forced me to.

But awareness is the whole game. You can’t fix what you don’t see.

Choose better seafood. Filter your water. Source cleaner animal products. Sweat regularly. These aren’t extreme protocols. They’re small upgrades that stack. Fewer toxins mean more energy, clearer thinking, and a more resilient immune system.

More information on toxins is coming in this series. Check back every week. We’re building a simple, real-world detox plan step by step.

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Want Help Building Your Personal Detox Protocol?

I work 1-on-1 with people to cut through the noise and build a plan that actually fits your life, your budget, and your biology. No extreme protocols. No guru nonsense. Just what works.

Please shoot me a message, or comment down below and we will talk!

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The Products I Actually Use

I’m building a dedicated resource page with every brand, product, and protocol mentioned across this newsletter — all tested, all vetted, all stuff I personally use. Coming soon. Check the homepage for more information.

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Sources: EPA on PCBs · Carpenter DO, PubMed 2006 · Hites RA et al., Science 2004 · Benedetti D et al., PMC 2022 · EWG Farmed Salmon Study · Sweating & Toxin Excretion, PMC · Norwegian Salmon Monitoring 2006–2021 · ATSDR on PFAS Half-Life