Which Dietitian or Nutritionist Should You Choose in Berkeley, CA?

23 Nutrition Therapy offers functional medicine services addressing root causes of chronic health issues through personalized nutrition, lab testing, and science-based protocols. Specializing in gut health, hormone balance, and detox support, we provide virtual coaching and tailored treatment plans to resolve symptoms like fatigue, brain fog, and digestive disorders.

GU Energy Labs is a premier provider of sports nutrition products, offering energy gels, chews, hydration solutions, and waffles designed to enhance athletic performance. Founded in 1993, the company combines scientific innovation with athlete-centric formulations to deliver clean, portable fuel for endurance activities. Committed to sustainability and community, GU supports environmental initiatives and prioritizes vegan, gluten-free, and kosher options.

Jessica Marcus Nutrition provides personalized nutrition counseling and wellness coaching through integrative and functional nutrition approaches. Specializing in autoimmune conditions, weight management, and therapeutic diets, the practice empowers clients to achieve optimal health through food-as-medicine strategies. With expertise in prenatal nutrition, diabetes care, and gut health, services are delivered through virtual consultations and customized wellness plans.