Do Adjunctive Therapies with Natural Products Improve Periodontal Clinical Parameters After Non-Surgical Treatment? A Systematic Review and Meta-Analysis. - de Molon, Rafael Scaf; Rodrigues, Joao Victor Soares; de Avila, Erica Dorigatti; da Silva Barbirato, Davi; Franco Moura, Joao Pedro; Monteiro, Gabriele Vanzela; Alves, Marcos Vinicius; Theodoro, Leticia Helena; Vernal, Rolando; Teughels, Wim (International Journal of Molecular Sciences, 2026)