Root Surge.

Ingredient research

Why AHK-Cu?

AHK-Cu is a copper-binding tripeptide studied in isolated human hair follicles and cultured dermal papilla cells. That laboratory research informs our interest in the ingredient for scalp-focused cosmetic formulas; it does not promise a specific result for every formula or person.

Opal discloses the AHK-Cu concentration in every formula and keeps the product promise focused on the appearance and feel of hair and scalp.

Product Documentation

Root Surge — full documentation

Everything on the label and in the formula, in plain language. High-potency targeted scalp serum with 2.5% AHK-Cu to support a fuller-looking appearance at the temples, part line and crown.

• Active2.5% pure Alanine/Histidine/Lysine Polypeptide Copper HCl
• UseTargeted
• Size30 mL / 1 fl oz
• Dosage0.5 mL — approximately 8–10 drops — once daily

Protocol

Step-by-step application

Apply directly to scalp skin, not the hair shaft, and allow a clean absorption window.

• 1. Scalp PreparationApply to a clean, dry, or towel-damp scalp. Part hair in sections so the dropper deposits serum directly onto scalp skin.
• 2. DispensingFor Root Surge, dispense 3–4 drops per temple and 3–4 drops across the vertex/crown.
• 3. DistributionUsing dry fingertips, massage the serum into the scalp with circular pressure for 60 seconds. Do not rinse out.
• 4. Absorption WindowAllow 15–20 minutes for the serum to dry before applying secondary styling products, leave-in conditioners, or going to sleep.

Expectations

Routine expectations

• Weeks 1–3Routine familiarization. With consistent use, the scalp may feel clean and comfortably conditioned.
• Weeks 4–8Keep the routine consistent and observe how the scalp and hair look and feel over time. Individual experiences vary.
• Weeks 12–16If you track progress, use photos taken in consistent lighting and from consistent angles rather than relying on day-to-day changes.
• Weeks 24+Review the appearance of your hair and scalp against your own starting point. Stop use if irritation occurs and seek professional advice for persistent concerns.

Safety

Handling, incompatibilities & disclaimer

• The 24-Hour Patch TestBefore initial scalp use, apply 2–3 drops to the inside of your wrist or behind the ear. Allow 24 hours to check for hypersensitivity or localized redness.
• Chemical IncompatibilitiesDo not combine in the same application window with strong direct acids such as glycolic or salicylic acid, high-strength L-ascorbic acid, or products containing chelating agents such as EDTA.
• Storage & HandlingKeep tightly sealed in a cool, dry area away from direct sunlight. Optimal temperature: 15°C–22°C / 59°F–72°F. The natural deep cobalt-blue color is derived from copper ions; no artificial colorants are added.