The formula avoids synthetic dyes, which is a plus for reactive scalps. However, it contains several botanical extracts (burdock, black radish) and active complexes. If you have a history of contact dermatitis, fragrance allergy, or known sensitivity to plant extracts, do a patch test: apply a drop behind the ear or on the inner forearm, leave for 24 hours, and watch for redness, itching, or swelling.
On colored, bleached, permed, or relaxed hair: the serum targets the scalp, not the hair shaft, so it does not strip color or interfere with chemical treatments. It can actually be helpful after frequent coloring or heat styling, when the root area feels stressed. Arginine and inulin add a light conditioning effect without weighing hair down.
If irritation occurs — persistent itching, burning, flaking, or rash — stop use and rinse the scalp with water. Consult a pharmacist or dermatologist if symptoms don't resolve within a few days. Store at room temperature, cap tightly after use, and use within 12 months of opening for best efficacy.