Dr. Claire Graser

Areas of Expertise: Women’s Health + Hormones
Locations: Marina/Cow Hollow and Virtual

As a healthcare professional, Dr. Claire focuses on integrative women’s health, balancing hormones, and addressing thyroid and adrenal dysfunction concerns. Her expertise extends to chronic UTI, HPV, and cervical dysplasia treatment. In her practice, she integrates conventional and functional medicine lab testing to inform diagnoses and guide her treatment approach.

Working closely with her patients, Dr. Claire develops comprehensive, personalized treatment plans. These plans are not just about medications but about a holistic approach to health. This includes: tailored nutrition advice, lifestyle counseling, manual therapies, botanical medicine, nutraceuticals, and, when necessary, hormone therapies. She aims to partner with each patient, ensuring their unique health needs and goals are met with the utmost care and professionalism.

Book Your Free 10-Minute Meet-&-Greet with Dr. Claire:
Click Here to Book Online at Marina/Cow Hollow
Text/Call to Book: (415) 580-0033
Email to Book or with Questions: luxeservices@b12love.com

Dr. Kieu Nguyen

Areas of Expertise: Women’s Health + Hormones, Nutrition + Weight Loss
Locations: Embarcadero Center (SF), Montclair, and Virtual

Dr. Kieu began her medical journey at the National University of Health Sciences in Chicago, Illinois, where she graduated in 2019. This education laid the groundwork for her holistic approach to medicine, emphasizing the treatment of the whole person, not just the symptoms. She is dedicated to foundational healing practices that are essential for long-term wellness and health.

Dr. Kieu’s passion lies in helping individuals find balance in their hormonal and digestive health. Through her practice, she strives to unravel the complex interactions between different bodily systems. She believes that understanding and addressing these interactions are key to restoring and maintaining health. She focuses on individualized care, recognizing that each patient presents a unique set of challenges and requires a tailored approach to treatment.

Moreover, her approach to healthcare extends beyond the physical aspects—she is a firm believer in the strength of patient education and empowerment. By providing her patients with the knowledge and tools they need to take charge of their health, Dr. Kieu aims to foster a collaborative environment where healing and wellness are a shared journey.

In her practice, she integrates both traditional and modern medical techniques, always staying abreast of the latest research and advancements in the field. This blend of practices allows her to offer the most effective treatments, ensuring that her patients receive the highest standard of care. Dr. Kieu’s ultimate goal is to guide her patients toward a harmonious state of health where they can lead fulfilling and vibrant lives.

Book Your Free 10-Minute Meet-&-Greet with Dr. Kieu:
Click Here to Book Online at Embarcadero Center
Click Here to Book Online at Montclair
Text/Call to Book Virtual: (415) 580-0033
Email to Book or with Questions: luxeservices@b12love.com

Dr. Sima Shafiei

Areas of Expertise: Women’s Heath, Hormone Health, Sexual Health, Aesthetics
Locations: Mill Valley, Novato, Pleasanton, Walnut Creek, and Virtual

Dr. Sima Shafiei began her career as a medical doctor in 1996, serving her community as a Family Doctor, and after her residency as an obstetrician and gynecologist—these experiences have shown her the limits of modern medicine. After moving to Toronto, Canada, with her family, she embarked on a journey to become a Doctor of Naturopathy.

As both an MD and ND, Dr. Sima is uniquely positioned to explore and dig into the root causes of illness and overall lack of well-being. She has more than a decade of experience in treatment and surgeries in women’s diseases, and more than five years of practice in Naturopathic Medicine. Dr. Sima has significant experience in women’s health in both conventional and alternative medicine.

Dr. Sima’s interests include: women’s health, fertility, skin health, and cosmetics. She always discusses the benefits of being friendly with nature in all aspects of life, and healthy living by paying attention to the body and the mind in order to create a personalized balance within the human body as a whole.

Book Your Free 10-Minute Meet-&-Greet with Dr. Sima:
Click Here to Book Online at Mill Valley
Click Here to Book Online at Novato
Click Here to Book Online at Pleasanton
Click Here to Book Online at Walnut Creek
Text/Call to Book Virtual: (415) 580-0033
Email to Book or with Questions: luxeservices@b12love.com

Lin Rubio, Nurse Practitioner

Areas of Expertise: Regenerative Medicine, Aesthetics, Nutrition + Weight Loss
Locations: Novato, Walnut Creek, and Virtual

Lin began her career in healthcare as a phlebotomist before transitioning into nursing, ultimately becoming a Registered Nurse. With extensive experience in ICU settings, she developed a calm, focused approach to care—grounded in both precision and compassion. In 2024, her commitment to advancing patient care led her to earn a Master’s Degree as a Nurse Practitioner.

Now serving clients at B12 LOVE, Lin is dedicated to promoting patient safety, education, and overall wellness. She encourages healthy lifestyle choices and is passionate about empowering her clients through knowledge and personalized care. As a bilingual provider fluent in Spanish, Lin is especially committed to supporting the Hispanic community.

Book Your Free 10-Minute Meet-&-Greet with Lin:
Click Here to Book Online at Novato
Click Here to Book Online at Walnut Creek
Text/Call to Book Virtual: (415) 580-0033
Email to Book or with Questions: luxeservices@b12love.com

Dr. Muhammad Mansour

Areas of Expertise: Regenerative Medicine (using ultrasound-guided imagery), IV Nutrient + Chelation Therapy, Ozone + Laser Therapy

Locations: Campbell, Mill Valley, and Virtual

Dr. Brooke Campbell

Areas of Expertise: Women’s Health + Hormones, Nutrition + Weight Management, Diabetes, Cardiovascular Disease

Locations: Greenbrae, Mill Valley, and Virtual

Dr. Brooke Campbell began her career in healthcare as a nutrition researcher and elementary school health coordinator, where she developed a deep appreciation for the role of nutrition in long-term wellness. Driven by a desire to provide more comprehensive, personalized care, she pursued naturopathic medicine and obtained licensure as a Naturopathic Doctor.

Dr. Brooke specializes in women’s hormone, metabolic, and cardiovascular health, helping women navigate concerns such as fatigue, irregular cycles, fertility, perimenopause, and menopause through thoughtful, evidence-informed care that addresses the root causes of symptoms.

Her approach blends advanced diagnostics and functional testing with nutrition, botanical medicine, targeted supplementation, and lifestyle medicine to create realistic, collaborative treatment plans tailored to each patient’s unique needs.

Dr. Brooke is passionate about empowering women with the knowledge, tools, and support they need to feel vibrant, resilient, and confident in their health at every stage of life.