ISSA Certified Personal Trainer | Nutrition Specialist (Boston University)

Naithen Matthews is an ISSA-certified personal trainer and a nutrition graduate from Cornell University, with advanced graduate study (MS and PhD level work) in Nutrition & Metabolism focusing on nutrient metabolism, energy balance, chronic disease mechanisms, and obesity.

With over five years of experience in fitness coaching and more than two years of writing in the health and wellness space, Naithen specializes in metabolism, women’s health, weight management, and natural wellness. He is passionate about turning complex science into clear, practical guidance that anyone can understand.

Naithen’s work reflects strong E-E-A-T principles, combining real-world coaching experience with evidence-based nutrition knowledge to help readers make safe, informed, and confident health decisions.