Andrew Ossa, RD

Hi, I’m Andrew Ossa, a bilingual Registered Dietitian, Personal Trainer, and founder of OSSA Nutrition. I bring over a decade of experience in clinical nutrition, fitness coaching, and performance training to help clients reach their health and body composition goals through a personalized and evidence-based plans.

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I specialize in sports nutrition, weight loss, and personal training, creating customized nutrition and fitness plans for sports like wrestling, bodybuilding, and active individuals to make this a sustainable lifestyle. My coaching is practical, empowering, and rooted in science. After every session my expectation is for you to leave more knowledgeable and empowered to take action.

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When working together, we’ll begin with an initial consultation to assess where you are in your nutrition and fitness journey. I take the time to understand your goals, current habits, challenges, and overall lifestyle. From there, we build an individualized plan short term and long term that may include:

* Ongoing check-ins to monitor progress and adjust your strategy

* Macro guidance and food log reviews to ensure your intake supports your goals

* Supplement recommendations tailored to your needs and lab data

* Workout program development with strength and conditioning protocols

* Exercise form reviews to maximize performance, build lean muscle mass and reduce injury risk. 

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My goal is to give you not only the plan but also the education and confidence to take control of your health and performance.

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Before launching my private practice, I earned my degree in Nutrition and Dietetics from Cal State Long Beach and completed a comprehensive one-year Dietetic Internship, training in both acute and performance settings including UCLA Sports Nutrition, St. Mary’s Medical Center, and West Residential Care. I’ve served as a Renal Dietitian Specialist III at DaVita Kidney Care, where I managed complex medical nutrition therapy and coached patients with chronic conditions.

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What sets me apart is my ability to bridge the gap between expert nutrition and fitness coaching. I’ve worked with competitive athletes, weekend warriors, and everyday individuals designing programs that align with their lifestyle, cultural background, and personal goals. I’m here to meet you where you’re at, whether you’re aiming to make weight for a competition, lose body fat, gain muscle, or simply develop healthier habits that stick.

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Outside of my professional work, I enjoy bodybuilding, home renovation projects, and tending to my garden of fruit and vegetable trees. I’m proud of my Mex-Colombian roots, and if I’m not coaching or training, you’ll probably find me enjoying a fresh roasted cup of coffee in a cozy cafe or going to the park with my son.

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So if you’re ready to improve your relationship with food, build confidence in your body, and take a sustainable approach to your health and fitness goals, I’d love to support you on that journey.