Exhibit 99.1 Hain Celestial Reports Fiscal Third Quarter 2024 Financial Results Fuel and Focus Efforts Generated by Hain Reimagined Strategy Drive Gross Margin Expansion, Strong Operating Cash Flow and Improvement in Leverage to 3.9x HOBOKEN, N.J., May 8, 2024 — Hain Celestial Group (Nasdaq: HAIN), a leading global health and wellness company whose purpose is to inspire healthier living through better-for-you brands, today reported financial results for its fiscal third quarter ended March 31, 2024. “We hav ...