🧪 GLUTATHIONE — PART 2 · Peptides: Out of the Shadows

🧪 GLUTATHIONE — PART 2

THE DELIVERY PROBLEM

Now we get into the part that probably matters most to anyone actually considering glutathione:

How do we get more of it into the body? There are several different approaches, and they are often discussed as though they're interchangeable.

They're not.

🔬 APPROACH #1 — PRECURSORS

One approach is to give the body more of the raw materials it needs to manufacture its own glutathione.

This is where NAC (N-acetylcysteine) and glycine come into the discussion.

NAC supplies cysteine, while glycine supplies another of the amino acids required for glutathione production. The strategy is straightforward: Provide more of the necessary building materials → let the body manufacture more glutathione itself.

You're not actually taking glutathione. You're trying to increase the body's ability to make it.

💊 APPROACH #2 — STANDARD ORAL GLUTATHIONE

The second approach seems even simpler: Take glutathione itself.

But now we run directly into the digestive system. When we swallow something, it doesn't simply travel from our mouth directly into our bloodstream. It has to survive the stomach, digestive enzymes and the intestinal environment before it can be absorbed.

And glutathione is a tripeptide. Our digestive system is specifically designed to break peptides and proteins down into smaller components. So the question with standard oral glutathione becomes:

How much of what I swallow actually survives the process and becomes available to the body?

📊 ABSORPTION vs. BIOAVAILABILITY

These two terms are frequently treated as though they mean the same thing.

They don't.

Absorption refers to a substance crossing from the digestive tract into the body.

Bioavailability refers to how much of the administered compound actually becomes available to circulation in a usable form.

That's why the number printed on the front of a supplement bottle doesn't necessarily tell us how much we're actually getting. Taking 500 mg does not automatically mean 500 mg becomes biologically available.

🫧 APPROACH #3 — LIPOSOMAL GLUTATHIONE

This is where supplement manufacturers tried to solve the oral-delivery problem. Instead of sending glutathione through the digestive tract completely exposed, liposomal delivery packages it inside microscopic lipid structures made primarily from phospholipids.

In plain English: Think of the glutathione as the cargo and the liposome as a tiny fat-based protective carrier. The goal is to protect more of that cargo during digestion and improve delivery. So now we have:

STANDARD ORAL - Glutathione enters the digestive system largely exposed.

versus

LIPOSOMAL - Glutathione enters packaged inside a lipid-based delivery system intended to improve its stability and absorption.

That sounds great. But there's an important distinction.

⚠️ SO DOES LIPOSOMAL ACTUALLY WORK BETTER?

This is where the marketing gets ahead of the research. The theory behind liposomal delivery makes sense: package glutathione inside a lipid-based carrier in an attempt to protect it during digestion and improve delivery. But “liposomal” does not automatically mean better absorbed, and it certainly doesn't mean “oral IV.”

There is some human research showing that liposomal glutathione can increase glutathione levels in the body. The problem is that the human evidence is still very limited. One frequently cited study involved only 12 people.

And when we step back and look at oral glutathione research as a whole, the results haven't been completely consistent. Some studies have shown little or no meaningful increase, while others have demonstrated increases in glutathione stores with ordinary oral glutathione.

More recent research is also beginning to compare different delivery technologies, including liposomal and micellar formulations—and we still don't have enough large, independent human trials to declare one oral delivery system the clear winner.

So at this point I think the fairest conclusion is:

Liposomal glutathione is a promising delivery strategy—not a proven shortcut around the digestive system. The science hasn't caught up with the marketing yet.

🧩 THREE ROUTES — THREE DIFFERENT STRATEGIES

Now the options become much easier to separate.

PRECURSORS - Supply raw materials and rely on the body to manufacture more glutathione.

STANDARD ORAL GLUTATHIONE - Supply the finished molecule and rely on the digestive and absorption process.

LIPOSOMAL GLUTATHIONE - Supply the finished molecule inside a delivery system designed to improve oral absorption.

These are three different biological strategies.

Which is why simply comparing the milligrams on the label doesn't tell us which approach is actually delivering the most usable glutathione.

But there's still another way to approach the entire problem.

💉 REMOVE THE DIGESTIVE TRACT FROM THE EQUATION

Instead of trying to improve oral delivery...Bypass it. Injectable

Injectable glutathione changes the delivery question because we're no longer asking the compound to survive the digestive tract before becoming available to the body. And once we move into injectable glutathione, another compound enters this discussion in a much bigger way:

Vitamin C.

v Why pair Vitamin C with glutathione?

v What role does Vitamin C play in the redox system?

v Why is injectable Vitamin C a very different animal from injectable glutathione?

And then we get to the question that originally sent me down this rabbit hole:

Your Body Your Code

CAN GLUTATHIONE AND VITAMIN C ACTUALLY GO INTO THE SAME SYRINGE?

That's Part 3.

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🧪 GLUTATHIONE — PART 2