EXO C-SERUM Vitamin C Treatment

Route: Topical application to facial or target skin areas.

Apply a thin layer of serum to cleansed, dry skin in the morning (vitamin C serums are classically morning preparations, as they protect against daytime oxidative stress). Follow with a broad-spectrum SPF ≥30 sunscreen. Gently massage into skin until absorbed. Avoid contact with eyes. Note: to preserve GHK-Cu activity in any co-prescribed copper peptide products, apply this vitamin C serum in the morning and copper peptide preparations in the evening (as vitamin C can oxidize the copper ion in GHK-Cu).

Application timing and frequency are prescriber-determined. Typical clinical practice:

• Apply once daily in the morning to freshly cleansed skin, followed by sunscreen.
• A small amount (pea-to-quarter-teaspoon size for the full face) is generally sufficient.
• Consistent use over 8–12 weeks is required before formal clinical evaluation of pigmentation and skin quality improvement.

• Vitamin C: Donates electrons to neutralize reactive oxygen species (ROS) generated by UV radiation and environmental oxidants, preventing lipid peroxidation and oxidative DNA damage in skin cells; acts as a required cofactor for prolyl hydroxylase and lysyl hydroxylase, enzymes that stabilize the collagen triple helix by hydroxylating proline and lysine residues — essential for collagen cross-linking and dermal tensile strength; inhibits tyrosinase by reducing its copper cofactor (Cu²⁺ → Cu⁺), blocking the conversion of tyrosine to melanin; may also act as a TGF-β inducer, further stimulating collagen gene expression.
• Exosome/EV Complex: Nano-vesicles internalized by skin cells deliver cargo including VEGF, KGF, and anti-inflammatory miRNAs; promote fibroblast proliferation, collagen production, and angiogenesis; suppress NF-κB-mediated inflammatory signaling, complementing vitamin C's antioxidant protection with receptor-mediated regenerative signaling.

Clinical Context: EXO C-SERUM is intended for use in prescriber-directed anti-aging, photo-damage, and dyspigmentation protocols. Vitamin C is a well-established dermatological ingredient with evidence supporting its use for fine lines, hyperpigmentation, skin brightening, and UV protection enhancement (as an adjunct to sunscreen, not a replacement). The exosome component adds a regenerative dimension by delivering growth factor signaling that goes beyond topical antioxidant therapy alone.

Monitoring Considerations:

• Assess skin tone, brightness, fine-line appearance, and tolerability at 8–12 weeks.
• Advise on the importance of daily sunscreen use, as vitamin C itself does not provide SPF protection but enhances overall photoprotection when combined with sunscreen.

Contraindications:

• Known hypersensitivity to ascorbic acid, any stabilized vitamin C derivative, or other serum components.

Warnings & Precautions:

• Vitamin C (especially L-ascorbic acid at low pH) can cause tingling or stinging on sensitive or compromised skin during initiation.
• Ascorbic acid is unstable and may oxidize in the formulation, turning orange/brown; an oxidized preparation should not be used and should be replaced.
• Do not apply simultaneously with preparations containing copper peptides (GHK-Cu); apply at separate times of day to prevent deactivation of the copper complex.
• For topical use only. Avoid ocular contact.

Drug Interactions:

• Topical copper peptides (GHK-Cu): concurrent application in the same session can oxidize and inactivate the copper peptide; separate application to different times of day.
• Benzoyl peroxide: oxidation of vitamin C may occur; separate application is advisable.

Common Side Effects: Mild stinging, tingling, or transient erythema, especially at higher ascorbic acid concentrations or on sensitive skin. Generally resolves with continued use. Skin oxidation discoloration of the serum is a product stability issue, not a skin adverse effect.

Store at controlled room temperature (20–25°C / 68–77°F) or as directed on the label. Protect from light and heat, as ascorbic acid is highly sensitive to oxidation by light and air. Keep tightly sealed. Do not expose to freezing temperatures. Use before the BUD assigned by Genesis Compounding. Discard if the serum turns dark orange or brown (indicating oxidation of vitamin C).

Why combine vitamin C with exosomes?

Vitamin C provides antioxidant protection and collagen co-factor support at the biochemical level. Exosomes add cell-to-cell signaling that directly activates fibroblasts to produce more collagen and dampens inflammation — targeting skin aging through complementary pathways that vitamin C alone cannot address.

Why does my serum sometimes turn orange or brown?

This discoloration indicates that vitamin C (ascorbic acid) has oxidized — a natural instability of this ingredient when exposed to air, light, or heat. An oxidized preparation has reduced efficacy and should be replaced. Proper storage (cool, dark, tightly sealed) slows oxidation.

Can I use this alongside my copper peptide preparation?

Not in the same application session. Vitamin C can oxidize and deactivate copper peptides (GHK-Cu). Apply vitamin C in the morning and copper peptide preparations in the evening, as directed by your prescriber.

Is this FDA-approved?

No. This is a 503A compounded preparation made by Genesis Compounding per prescriber specifications. It is not an FDA-approved drug product.

Should I apply sunscreen after this serum?

Yes — always. Vitamin C helps protect against UV-induced oxidative damage but does not itself block UV radiation. Follow this serum with a broad-spectrum SPF ≥30 sunscreen every morning.