The label's claims check out — this is a legitimate, evidence-backed anti-dandruff formulation

• Ketoconazole IP 2.0% w/v
• Zinc Pyrithione 1.0% w/v
• Shampoo base q.s., colored with Erythrosine

1. "Ketoconazole is a medically proven ingredient that treats the root cause of dandruff" — True. Dandruff and seborrheic dermatitis are strongly linked to overgrowth of the yeast Malassezia on the scalp. Ketoconazole is an antifungal that reduces this yeast population, addressing the underlying driver rather than just symptoms - confirmed across multiple standard references (Jawetz Melnick & Adelberg's Medical Microbiology; Harrison's Principles of Internal Medicine; Fitzpatrick's Dermatology).
2. "Zinc pyrithione is a proven medicinal agent against the root cause of dandruff" — True, with a caveat on mechanism. Zinc pyrithione also has antifungal activity against Malassezia (via membrane depolarization, per a 2018 Scientific Reports study), and some texts describe it as also normalizing epithelial keratinization/sebum turnover. So it's a genuine, well-established anti-dandruff agent, though its primary mechanism is anti-Malassezia rather than purely "keratolytic."
3. Combining the two is a real, studied approach. A landmark trial (Piérard-Franchimont et al., Skin Pharmacol Appl Skin Physiol 2002) directly compared 2% ketoconazole vs 1% zinc pyrithione shampoos in severe dandruff/seborrheic dermatitis - both were effective, with ketoconazole showing a slightly larger effect (73% vs 67% improvement in a related trial). Combination products pairing the two are a recognized commercial/clinical formulation strategy to leverage both agents' antifungal action.