What are immune peptides?

Immune peptides are short chains of amino acids that act as messenger molecules, carrying immune information between cells. The most-studied immune peptide is the transfer factor, identified in 1949, which transfers immune knowledge from one immune system to another.

Are transfer factor peptides a vitamin or a stimulant?

Neither. Transfer factor peptides are immune messenger molecules, not vitamins, minerals, or stimulants. Instead of adding a nutrient or pushing the system harder, they share information immune cells can act on.

What is Transfer Factor Max?

4Life Transfer Factor Max is the most advanced formula in the line: 900 mg of transfer factor peptides from plant, cow colostrum, and chicken egg, plus PhytoFactor and IP-6. It supports the four R's — recognize, respond, remember, and repair — in 120 veggie capsules.

PhytoFactor is plant-based 4Life transfer factor from the seeds of Brassica napus — the world's first-ever vegan transfer factor, featured in Transfer Factor Max.

Immune Peptides & Transfer Factor Peptides — Borrowed Immunity

Original intelligence

What if you could raise your immune IQ?

Your immune system runs on information — the better it's educated, the smarter it acts. Immune peptides are how that education gets passed from one immune system to the next. Think of it as your body's original intelligence.

01

Smarter, not louder

It isn't about cranking your immune system into overdrive — an overreacting immune system causes as many problems as a sluggish one. A higher immune IQ means a smarter, better-informed response.

02

Knowledge has to be passed on

Your immune cells learn. Every threat they recognize, they can remember — but that knowledge has to be handed to the next generation of cells. That hand-off is everything.

03

Messengers carry the lesson

Immune peptides are the couriers that carry those lessons from one cell to another. Nature has used them for millions of years to pass immune wisdom from mother to newborn.

So if a sharper immune system comes down to better information — what's actually delivering it? Let's meet the messenger.

The education

So… what exactly is an immune peptide?

Peptides are short chains of amino acids — the body's natural "text messages." Immune peptides are a special class that carry instructions between immune cells.

In plain English: they're tiny molecular memos that say, "Here's what a threat looks like. Recognize it. Respond to it. Remember it — and now, help repair what it leaves behind."

One of the most studied of these messengers was first identified in 1949 and named the transfer factor — because it literally transfers immune knowledge from an experienced immune cell to a naïve one. It's how a newborn inherits immune wisdom from its mother's first milk.

The exciting part: these messengers aren't unique to humans. They're highly conserved across mammals — which means the immune education stored in one source can be shared with another. That single insight became the foundation of an entire category of immune support.

But where does that immune education actually come from? The answer spans a hen house, a dairy barn — and now, something no one saw coming.

Where it comes from

Three sources. One amazing discovery.

For decades, transfer factors came from two places in nature. Then science found a third — and it changed what immune support could be. Tap each source to explore.

Three sources, one kind of message. So what does that message actually do once it's inside you?

How transfer factors work

The 4 R's of a smarter immune system.

Transfer factors don't force your immune system to do anything. They hand it better information — so it can recognize, respond, remember, and now repair, all on its own.

The 1st R · within minutes

Recognize

Helps immune cells identify what to keep and what to clear — faster and more accurately than they would alone.

The 2nd R · within ~2 hours

Respond

Supports a measured response that clears flagged threats while leaving healthy cells untouched — then cleans up after.

The 3rd R · over time

Remember

Reinforces immune memory, so newly regenerated cells inherit the wisdom of experienced ones for next time.

New · with Max

The 4th R · now, with Max

Repair

The newest breakthrough: Transfer Factor Max is clinically shown to mobilize millions of stem cells for targeted repair.

It sounds almost too elegant to be real. So here's the part that matters: someone has spent 25 years making it real.

The breakthrough you came here for

Meet 4Life Transfer Factor

For over 25 years, one company has built its entire science around this single idea: that immune education can be extracted, concentrated, and shared. 4Life pioneered the patented process to do exactly that.

✓Sourced from nature. Concentrated immune peptides from chicken egg yolk, cow colostrum — and now plant sources (PhytoFactor™).

✓Patented & proprietary. A multi-patented extraction and concentration process unique to 4Life.

✓Clinically observed. A 600 mg daily serving has been shown to support immune activity within two hours.

✓Trusted worldwide. Used by families in more than 50 countries for everyday immune support.

The hero formula · Most advanced

Clinically Proven 4Life Transfer Factor Max with PhytoFactor and IP-6 bottle, 120 veggie capsules

PhytoFactor™ IP-6 Clinical-Strength

Transfer Factor Max

4Life's most advanced formula — 900 mg of plant, colostrum & egg peptides (all four types of Transfer Factor), plus PhytoFactor™ and IP-6.

✦ New · launching July 1 — be among the first

--days

--hrs

--min

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90%+ immune cell coverage — broadest-spectrum yet¹Breadth of immune cell types supported, per 4Life clinical white paper (Gardner et al., 2026).
2-hour immune system activation²Clinically shown to support immune activity within two hours — Yu et al., Curr. Issues Mol. Biol. 2024.
Mobilizes stem cells for targeted repair — the 4th R³Clinically shown to mobilize stem cells for targeted repair — 4Life clinical report (Jensen et al., 2026).

3PEPTIDE SOURCES

90%+CELL COVERAGE

120VEGGIE CAPS

Start with Max →

30-day money-back guarantee.4Life backs every product 100%. Not satisfied? Full refund.

Explore Max & PhytoFactor → · or see the full family below.

Choose your fit

The Transfer Factor family

Five flagship formulas, one foundation. Start simple or go all-in — every one is backed by the same 30-day guarantee.

Foundational

Classic

Patented Immune Support · 90 veggie capsules

★★★★★ 5.0 (314)

$48.00 · 90 caps

Peptides from colostrum
Balances the immune system
Increases Natural Killer (NK) cells

Get Classic →

Tri-Factor®

Advanced Immune Support · 60 veggie capsules

★★★★★ 5.0 (407)

$53.00 · 60 caps

Peptides from colostrum & egg
2-hour immune system activation
Increases NK, B & T cells

Get Tri-Factor →

4Life Transfer Factor Tri-Factor Citrus Cream Chewables bottle, 90 tablets

Easy to take

Tri-Factor® Chewable

Citrus Cream Chewables · 90 tablets

★★★★★ 5.0 (271)

$54.00 · 90 tablets

Same Tri-Factor support, no water needed
Great-tasting citrus cream — kid-friendly
Increases NK, B & T cells

Get Chewable →

Powerful

Plus® with Zinc

Powerful Immune Support · 60 veggie capsules

★★★★★ 5.0 (1,212)

$70.00 · 60 caps

Boosts, balances & educates immunity
Added zinc for extra support
Adds macrophage activation

Get Plus →

Want the most advanced formula? That's Transfer Factor Max ↑ — featured above, with peptides from plant, colostrum, and egg.

Save 15% with the Loyalty Program. Earn 15% back in points every month, redeem them for free products, and lock in member pricing on every reorder.

Find your fit

Which one is right for you?

Every formula shares the same foundation — they differ in sources, breadth of immune support, and format. Here's the whole family at a glance.

	ClassicFoundational	Tri-Factor®Advanced	ChewableAdvanced	Plus®Powerful	The heroMaxMost advanced
Rating	★★★★★ 5.0 · 314	★★★★★ 5.0 · 407	★★★★★ 5.0 · 271	★★★★★ 5.0 · 1,212	New · July 1
Best for	Everyday basics	Most popular all-rounder	No pills / ages 2+	Extra support	The complete formula
Format	Capsule	Capsule	Citrus-cream chewable	Capsule	Capsule
Peptide sources	Cow	Cow + Egg	Cow + Egg	Cow + Egg	Cow + Egg + Plant
Immune cells supported	NK	NK · B · T	NK · B · T	NK · B · T · Macrophages	NK · B · T · Neutrophils · Macrophages
Standout	Patented immune support	Tri-Factor® blend	Great-tasting, kid-friendly	+ Zinc & mushroom blend	PhytoFactor™, IP-6 & stem-cell repair
Size	90 capsules	60 capsules	90 tablets	60 capsules	120 capsules
Price	$48	$53	$54	$70	July 1
	Classic →	Tri-Factor →	Chewable →	Plus →	Max →

Swipe to compare · all backed by 4Life's 30-day money-back guarantee

Your immune IQ

Not sure where to start?

Answer three quick questions and we'll point you to the transfer factor that fits you best.

Extracted, never invented

Nature's first supplement — simply captured

Transfer factors aren't engineered in a lab. They're immune messengers nature has relied on for millions of years — gently extracted from their natural sources and concentrated into a capsule, so your immune system can borrow the wisdom.

Works with your body

It supports an educated, balanced immune response instead of forcing your system into overdrive — the way thoughtful daily wellness should feel.

Simple to keep up

One small daily capsule. No routine to overhaul, nothing to remember beyond your morning — which is exactly why people actually stick with it.

A track record you can trust

A multi-patented process, sourced from nature, used in 50+ countries for over 25 years — and backed by a 30-day money-back guarantee.

5.0★

avg. on top sellers

2,200+

verified 5-star reviews

50+

countries

28 yrs

of research

Verified ratings from 4Life's product pages (e.g., Tri-Factor 5.0★ from 408 reviews, Plus 5.0★ from 1,212). Want named quotes too? Add genuine customer reviews — only authentic ones, per FTC guidelines.

Grounded in science

Not a trend — a 25-year body of research.

The transfer factor on this page isn't a buzzword. 4Life Research has studied it since 1998, with patented sources, independently certified manufacturing, and peer-reviewed publications behind the science.

Watch: the science of 4Life Transfer Factor — straight from the company that pioneered it.

6 + 38

U.S. and international patents protecting 4Life Transfer Factor processes and formulas.

NSF GMP

Registered manufacturing — independently audited Good Manufacturing Practices.

Since 1998

An in-house PhD R&D team plus a global Health Sciences Advisory Board.

Peer-reviewed

Published studies, white papers, and a Prescribers' Digital Reference (PDR) listing.

Four proprietary, named sources of transfer factor peptides: UltraFactor® & NanoFactor® (cow colostrum), OvoFactor® (chicken egg yolk), and PhytoFactor™ (plant).

Registered facility

Patent protected

Money-back guarantee

Accredited business

Select references: independent laboratory studies report that core 4Life Transfer Factor products bolster Natural Killer (NK) cell activity while activating B cells, T cells, and macrophages.† Vetvicka V., Vetvickova J. (2019) J Nutr Health Sci 6(3):301; Vetvicka V., Fernandez-Botran R. (2020) Int Clin Pathol J 8(1):1; Andersen A. et al. (2021) J Immunol Methods 499; Yu L. et al. (2024) Curr. Issues Mol. Biol. 46:6710-6724. Some results are from laboratory or preclinical studies. Explore the full record on 4Life's Science and Studies & Publications pages.

† These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

Trend vs. truth

Peptides are having a moment. Here's what's real.

"Peptide" is suddenly the word of the year — so it's worth separating the hype from the science.

Myth

"Immune peptides are a brand-new trend."

✓ Fact

Transfer factor — a specific immune peptide — has been studied since 1949 and refined by 4Life for 28 years.

Myth

"More immune 'boosting' is always better."

✓ Fact

An overreacting immune system causes problems too. Transfer factor supports a balanced, smarter response — not overdrive.

Myth

"All peptides do the same thing."

✓ Fact

Transfer factors are immune messenger molecules that carry knowledge between cells — a different job than collagen or cosmetic peptides.

Honest answers

Questions people ask first

Neither. Transfer factors are immune messenger molecules, not vitamins, minerals, or stimulants. Rather than adding a nutrient or pushing your system harder, they share information your immune cells can act on. Many people take them alongside their usual vitamins.

4Life concentrates transfer factor peptides from three natural sources, each with its own patented or proprietary process: cow colostrum (UltraFactor® and NanoFactor®), chicken egg yolk (OvoFactor®), and — newest — plant seeds (PhytoFactor™, from Brassica napus, the world's first vegan transfer factor). Filtering preserves the immune messengers so each serving is consistent.

The aim of transfer factors is balance, not overdrive. They support a more educated response — helping the immune system recognize and respond appropriately rather than simply turning everything up. If you have an autoimmune condition or take medication, talk with your healthcare provider first.

It's a simple daily capsule. Immune support is cumulative — it's about consistency over time, the way good habits work. Most people make it a permanent part of their morning routine rather than something they take only when they feel run down.

Start with the Tri-Factor® Formula — it's the flagship, the most popular, and the easiest introduction. Drop your email below and I'll personally send you a simple starter guide and the direct link, so you can learn at your own pace before deciding.

Kevin and Courtney Moore — independent 4Life distributors

From your distributors

Why we share this

Peptides are suddenly everywhere — the word's on every label this year. But 4Life has been doing the real science of immune peptides for 28 years, long before it was a trend. We've been here since the early days: taking transfer factor ourselves, sharing it with the people we love, and watching the research grow right alongside the company that pioneered it.

So while everyone else is just discovering "peptides," we're standing on something that's been quietly proven for nearly three decades. We're not a faceless store — we're real people who believe in this. If you have a question or aren't sure where to begin, we'd genuinely love to help you find your starting point.

— Kevin & Courtney MooreIndependent 4Life Distributors · info@4lifetransferfactorproducts.com

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