Nootropics Market Size, Share & Industry Analysis, By Product Type (Synthetic, Natural/Herbal, and Others), By Ingredient (Caffeine, L-Theanine, Bacopa Monnieri, Ginkgo Biloba, Choline Compounds, and Others), By Indication (Memory Enhancement, Attention & Focus, Mood, Stress & Sleep Support, Anti-aging & Brain Health, Sports, Energy & Performance, and Others), By Formulation (Tablets, Capsules, Powder, Gummies, and Others), By Distribution Channel (Drug Stores & Retail Pharmacies, Supermarkets/Hypermarkets, Online Channels, and Others), and Regional Forecast, 2026-2034