Stay Hydrated with Natural Seawater Electrolytes Natural, cold micro-filtered seawater Convenient packaging for on-the-go hydration Achieve optimal performance with QuintEssential® 3.3 Hypertonic Elixir. This seawater supplement contains naturally-occurring electrolytes, giving you complete hydration before, during, and after any strenuous activity, or whenever your body needs re-mineralization.