What Is SignalSource™ Technology? The Science of Cellular Communication in Skincare

SignalSource™ is Angela Caglia Skincare’s proprietary, patent-pending cell-signaling complex, built from human mesenchymal stem cell conditioned media. It delivers exosomes, growth factors, cytokines, bio-identical peptides, and antioxidants in a single clinical-grade blend. SignalSource™ is the technology that powers the Cell Forté™ Collection.

In this article

• What is SignalSource™ technology?
• The five active components in SignalSource™
• How SignalSource™ is made
• Why mesenchymal stem cells matter for skin
• What this means for your skin
• The Cell Forté™ Collection
• Frequently asked questions
• References

What is SignalSource™ technology?

SignalSource™ is a clinical-grade, cell-signaling complex created from human mesenchymal stem cell (MSC) conditioned media. It does not contain stem cells. It harvests the molecules those cells produce — the messengers that carry instructions from one skin cell to the next — and pairs them with a curated profile of bio-identical synthetic peptides and antioxidants.

This is what cosmetic chemists call a cell-free approach. Nothing in the bottle relies on living cells. The science is upstream: stem cell scientists grow donor MSCs in a controlled lab, feed them the salts and nutrients they need, and capture the conditioned media those cells secrete. That media carries the active payload — billions of exosomes, dozens of growth factors and cytokines — which is then blended with synthetic peptides and antioxidants into the final complex.

The result is a regulatory-safe, ethically sourced, biologically active cell-signaling complex. Not stem cells. The molecules they make.

The five active components in SignalSource™

SignalSource™ delivers five categories of skin-active molecules. Each plays a distinct role in supporting the look and feel of healthy, well-functioning skin.

Exosomes

Exosomes are nanoscale lipid vesicles, roughly 30 to 150 nanometers in diameter, that cells use to communicate with one another. They carry signaling cargo — proteins, lipids, RNA fragments — from cell to cell. In skin biology, MSC-derived exosomes are studied for their role in supporting the natural renewal cascade and the activity of fibroblasts, the cells responsible for collagen and elastin organization.

Growth factors

Growth factors are proteins that bind to receptors on skin cells and influence cell behavior — proliferation, migration, and differentiation. SignalSource™ contains the broad growth factor profile that mesenchymal stem cells naturally produce: the kind of biological signaling a young, well-functioning skin cell receives constantly from its neighbors.

Cytokines

Cytokines are small signaling proteins that coordinate communication between cells, including the responses that govern soothing and barrier support. The cytokine profile in SignalSource™ mirrors what MSCs themselves secrete in tissue.

Peptides

Peptides are short chains of amino acids that act as targeted signaling molecules in skin. SignalSource™ adds a curated set of bio-identical synthetic peptides chosen to complement the biological cargo from the conditioned media. These peptides are selected for visible-aging concerns: firmness, elasticity, and the appearance of fine lines.

Antioxidants

Antioxidants neutralize free radicals from UV exposure, pollution, and metabolic stress. SignalSource™ pairs its biological signaling cargo with a curated antioxidant blend, so the formula supports skin in two directions at once: signaling renewal and protecting against oxidative damage.

How SignalSource™ is made

The SignalSource™ process happens in three stages, all performed at a cGMP-certified stem cell research lab. The diagram at the top of this article walks through the same flow visually.

Step 1: Source. A single source — about one teaspoon — of human mesenchymal stem cells is extracted from adipose tissue (fat) of a healthy, consenting adult donor aged 20 to 22, performed by a plastic surgeon. The tissue is shipped frozen to a cGMP-certified stem cell research facility. A single source is then expanded in the lab over years — no new harvests required.

Step 2: Culture. Stem cell scientists grow the MSCs by hand, in small batches, feeding them the salts and nutrients they need to thrive. As the cells live and grow, they secrete their full signaling cargo into the surrounding media.

Step 3: Capture and blend. The conditioned media — now rich in billions of exosomes, growth factors, and cytokines — is collected and characterized. It is then blended with a curated profile of clinically studied peptides and antioxidants. That blend is the SignalSource™ complex that goes into every Cell Forté™ product.

Why mesenchymal stem cells matter for skin

Mesenchymal stem cells (MSCs) are sometimes described as the foundational cell of regenerative medicine. They are studied across orthopedics, wound research, and dermatology for their role in tissue maintenance and the way they communicate with surrounding cells through signaling molecules — the same family of molecules SignalSource™ harvests.

The exosome and conditioned-media category in skincare is not a single thing. Different brands use different cell sources, and the source matters:

• Adipose-derived MSCs (AD-MSC). The source used for SignalSource™. Sourced from consenting adult donors. Widely accepted for ethical sourcing.
• Umbilical cord-derived material. Used by some competitors. Effective, but raises sourcing questions for some buyers.
• Platelet-derived material. A different biological category entirely — circulatory rather than mesenchymal signaling.
• Synthesized molecular complexes. Lab-synthesized blends that are not derived from cells at all.

SignalSource™ is built on adipose-derived material from consenting adult donors, processed in an FDA-regulated research institution, under cGMP pharmaceutical-grade manufacturing standards.

What this means for your skin

Cell Forté™ products powered by SignalSource™ are formulated for a specific job: to support the skin’s own renewal communication, while delivering cosmetic peptides and antioxidants for visible smoothness, firmness, and tone. The formulas are designed to be gentle enough for daily use, layer well with your existing routine, and feel weightless on the skin.

Real customers describe the experience consistently:

“Best skin care product I have ever used with the fastest results. I have tried many products and this one impressed me immediately. My skin is smoother and softer and my wrinkles are diminished.”
— Verified review, Cell Forté Serum

“I have been using this for about a year and while it seems expensive it’s replaced retinol, vitamin C and other serums. I like what I see and I feel better about my skin heading to 70 soon. Worth every penny. A lifetime subscriber.”
— Verified review, Cell Forté Serum

“Thank you, Angela, for bringing such a technical advancement in skin care to us all. Bravo.”
— Verified review, Cell Forté Serum

The Cell Forté™ Collection

SignalSource™ powers every product in the Cell Forté™ Collection:

• Cell Forté Serum — the hero serum and the most concentrated SignalSource™ expression in the line.
• Cell Forté Eye Crème — the only Angela Caglia product with a third-party instrumental clinical study (Essex Testing Clinic, 31 women, 8 weeks).

Shop Cell Forté Serum

Frequently asked questions

What is SignalSource™ technology?

SignalSource™ is Angela Caglia Skincare’s proprietary, patent-pending cell-signaling complex. It is built on conditioned media derived from human adipose mesenchymal stem cells, and delivers exosomes, growth factors, cytokines, bio-identical peptides, and antioxidants in a single clinical-grade blend.

Does SignalSource™ contain stem cells?

No. SignalSource™ does not contain stem cells. It contains the molecules stem cells produce — the signaling cargo, captured from the conditioned media those cells secrete. The brand positions this as “not stem cells, the molecules they make.”

Where does the source material come from?

From adipose tissue donated by healthy, consenting adult donors aged 20 to 22, with the procedure performed by a plastic surgeon. The tissue is shipped to a cGMP-certified stem cell research facility, where the cells are expanded and cultured under pharmaceutical-grade conditions. A single original source has supported years of conditioned-media production — new harvests are not required.

What is conditioned media?

Conditioned media is the nutrient-rich liquid that surrounds cells during lab culture. As the cells grow, they secrete their full signaling cargo — exosomes, growth factors, cytokines — into that media. The media is then collected and the active molecules harvested. Nothing in conditioned media is a living cell.

How is SignalSource™ different from other exosome serums?

Three differences. First, source: SignalSource™ uses adipose-derived material from consenting adults, not umbilical cord or platelet-derived material. Second, manufacturing: cGMP pharmaceutical-grade processing in an FDA-regulated research institution. Third, formulation: SignalSource™ is a complete cell-signaling complex, not just exosomes — it pairs the conditioned-media cargo with bio-identical peptides and antioxidants in one blend.

Is SignalSource™ vegan?

No. SignalSource™ is derived from human cells (the donor adipose tissue) and is therefore not vegan. It is, however, cruelty-free: no animal testing is involved, and the cell source is from a single consenting adult donor expanded over time, not from ongoing harvests.

Is SignalSource™ FDA-approved?

No. Cosmetics in the United States are not approved by the FDA. SignalSource™ is manufactured at a cGMP-certified facility within an FDA-regulated research institution — that addresses manufacturing standards and is distinct from drug approval. Cell Forté™ products are cosmetics, not drugs.

Which products contain SignalSource™?

SignalSource™ powers the Cell Forté™ Collection, including Cell Forté Serum and Cell Forté Eye Crème.

References

1. Hade MD, Suire CN, Suo Z. Mesenchymal Stem Cell-Derived Exosomes: Applications in Regenerative Medicine. Cells. 2021;10(8):1959. PMC8392689
2. Han G, Kim H, Kim DE, et al. The Potential of Bovine Colostrum-Derived Exosomes and MSC-Derived Exosomes in Skin Regeneration: A Comprehensive Review. International Journal of Molecular Sciences. 2024. MDPI
3. Mendt M, Kamerkar S, Sugimoto H, et al. Generation and testing of clinical-grade exosomes for pancreatic cancer. JCI Insight. 2018. (Methodology reference for cGMP exosome manufacturing.) JCI Insight

Last updated: May 2026. Educational content. Not intended as medical advice. Cell Forté™ products are cosmetics intended for the appearance of skin.