DPP-IV · GLP-1 · GIP

Your body already makes the hormone that says you're full. An enzyme destroys it in minutes.

GLP-1 and GIP are the hormones behind the world's most talked-about weight-loss drugs — and your gut already produces them after every meal. DPP-IV is the enzyme that switches them off almost immediately. PlantDPP is a plant-derived ingredient designed to get in its way.

Plant-derived from spirulina
Oral — no injection
Works with natural biology
Active hormone remaining after a meal
100% 50% 0% 0 min 120 min
Left alone DPP-IV slowed down
Illustrative concept chart — shapes shown for teaching purposes, not measured data.
What happens when you eat

A helpful signal, built and torn down in minutes

The whole cycle takes minutes. Step four is the one most people have never heard of — and it's where this entire story lives.

1

You eat

Food arrives in your small intestine.

2

Gut sends signals

Specialized cells release hormones called incretins — GLP-1 and GIP.

3

Body responds

Insulin is released, the liver slows sugar output, and the brain registers fullness.

4

Signal switched off

An enzyme called DPP-IV destroys those hormones within minutes.

Meet the hormones

GLP-1 and GIP — your body's own metabolic messengers

Made by sensor cells scattered through your gut lining, released within minutes of eating. The blockbuster weight-loss drugs are engineered copies of GLP-1 — your body makes the real thing after every meal.

GLP-1
Glucagon-Like Peptide-1 · half-life ≈ 2 minutes
  • Tells the pancreas to release insulin — only when blood sugar is actually high
  • Tells the liver to stop pushing stored sugar into the bloodstream
  • Tells the stomach to empty more slowly
  • Tells the brain that you've eaten enough
GIP
Glucose-dependent Insulinotropic Polypeptide
  • Released from K-cells higher up in the small intestine
  • Like GLP-1, signals the pancreas to release insulin after a meal
  • Switched off by the same enzyme, for the same structural reason
  • Both hormones carry alanine in position two — DPP-IV's target site
The enzyme

DPP-IV: molecular scissors with a very specific taste

Dipeptidyl Peptidase-4 — the name is the job description. It snips exactly two amino acids off the end of a protein chain, wherever the second bead is alanine or proline.

His
Ala
Glu
Gly
Thr
Phe
Thr
Ser

GLP-1's chain — position two is alanine, so DPP-IV cuts here. Once those first two beads are gone, the hormone no longer fits its receptor. It still exists — it just stops working.

It was already there

DPP-IV isn't released in response to your meal — it's built into cell surfaces throughout your body, all the time: gut lining, kidneys, blood vessels, liver, immune cells. On T-cells it's better known as CD26. Standing infrastructure, not a response — which is exactly why a gentle, food-based slowdown makes more sense than a hard blockade.

Two approaches

Add a copy — or protect your own

There are two very different ways to work with this system.

Approach A

Add a copy — the injectable drugs

A laboratory-built copy of GLP-1 is injected. It's deliberately redesigned so DPP-IV can't cut it — so it lasts for days instead of minutes.

  • Very powerful
  • Prescription and injection
  • Overrides the natural system
Approach B

Protect your own

Instead of adding a copy, get in the way of DPP-IV so the hormone your body already made survives longer.

  • Gentler, supportive effect
  • Oral — no injection
  • Works with natural biology
This is where PlantDPP sits.
Important: the injectable drugs are engineered to resist DPP-IV. Slowing DPP-IV down does nothing for someone already taking them — these are alternatives, not partners.
The ingredient

What PlantDPP is

A group of tiny protein fragments — peptides — made from spirulina, shaped so DPP-IV grabs them instead of grabbing your hormones. These peptides don't exist in ordinary spirulina powder; they're created during manufacturing.

1

Spirulina

A protein-rich algae eaten as food for decades.

2

Its proteins

Long chains, folded up. Not active this way on their own.

3

Cut apart

An enzyme snips the chains into thousands of short fragments.

4

Sorted

Only the smallest, most useful fragments are kept.

5

PlantDPP

A dried powder standardized by how well it blocks the enzyme.

Why this matters commercially: because the active pieces are made rather than extracted, a competitor can't simply buy them. The know-how for the cutting step is protected as a trade secret.
The advantage

A swallowed capsule delivers to exactly the right place

This is the single most important thing to understand about why a food-based ingredient could work at all. Everything happens in the same few square inches of gut wall.

Everything is co-located

L-cells and K-cells release the hormones, vagus nerve endings wait to carry the signal, and DPP-IV sits anchored on the gut surface — all in the same wall.

A pill for the bloodstream struggles

It has to survive digestion, cross the gut wall, get past the liver, and still be present in useful amounts. Most of it never makes it.

PlantDPP doesn't need to

It's already where it needs to be the moment the capsule opens — at its highest concentration, in direct contact with the enzyme it's meant to slow down.

Taken with a meal, everything lines up: the peptides are in the gut at the same moment food is passing through, hormones are being released, and DPP-IV is at work. On an empty stomach there's little hormone to protect — so the dose is timed to meals.
The evidence

What has been shown so far

Being straight about this: everything proven to date is in test tubes and animals. Promising — but not the same as proven in people.

In the test tube

Spirulina peptides measurably block DPP-IV — shown by several independent research groups.

Peptides identified

Individual active fragments have been isolated and their sequences read.

In animals, by mouth

Oral dosing lowered fasting blood sugar and improved glucose tolerance in diabetic mice.

Survives digestion

Digestion appears to improve, not destroy, the activity — encouraging for an oral product.

In humans

Not yet done — for this ingredient or any of its type. This is the gap the planned clinical study is designed to fill.

This is nutrition, not medication. Expect a nudge, not a transformation — and treat every claim on this page as a hypothesis pending the completion of human clinical study.
The whole story

Eight sentences, start to finish

  1. 01

    Sensor cells in your gut wall detect food and release two hormones — GIP from the upper gut, GLP-1 from further down.

  2. 02

    These hormones are why swallowing sugar triggers far more insulin than injecting it — they do 40–65% of the work.

  3. 03

    An enzyme called DPP-IV snips two amino acids off each hormone and switches it off within minutes.

  4. 04

    It can do that because both hormones carry the same amino acid in position two. Destroying them is a side effect of a general-purpose tool.

  5. 05

    Slow DPP-IV down, and your own hormones last longer — no injection, nothing artificial added.

  6. 06

    PlantDPP is a set of spirulina-derived peptides shaped to get in the enzyme's way, created during manufacturing rather than extracted.

  7. 07

    Taken with a meal, a swallowed capsule delivers them straight to the gut wall — the exact place hormones are released and destroyed.

  8. 08

    Laboratory and animal evidence is encouraging. Human evidence doesn't exist yet — and producing it is the point of the plan.

Common questions

If the hormones die in minutes, why would this matter for hours?

Why do I feel full for hours if the hormone only lasts minutes? +

Because the two-minute lifespan describes a single molecule, not the whole signal. Your gut keeps releasing more GLP-1 and GIP for as long as food is moving through — often an hour or two. Slowing the destruction side shifts the balance up, without making any more hormone. GLP-1 is also only one voice in the chorus: stomach stretch, PYY, CCK, dropping ghrelin, and slower stomach emptying all contribute to feeling full.

Does taking this compete with prescription GLP-1 drugs? +

No. PlantDPP is positioned for people who are not on GLP-1 drugs, or who are transitioning off them — not as an add-on to active prescription therapy. The injectable drugs are engineered to resist DPP-IV, so slowing DPP-IV down has no effect on them.

Why does a swallowed capsule make sense, rather than an injection? +

The hormones, the nerve endings that respond to them, and most of the DPP-IV that destroys them are all concentrated in the same few square inches of gut wall. A swallowed capsule delivers its contents directly into that space — at its highest concentration, in direct contact with the enzyme — without needing to survive digestion, cross the gut wall, or circulate through the blood in meaningful amounts.

What's actually been proven? +

Test-tube inhibition of DPP-IV by spirulina-derived peptides, identification of the active fragments, and favorable results in oral animal studies. No human clinical study of this ingredient — or any ingredient of its type — has been completed yet. That study is the point of the plan, and everything about expected effects in people remains a hypothesis until it reads out.

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