


GR Medical Weight Management in Grand Rapids, Michigan, operates under the clinical direction of Dr. Peter S. Macfield, a board-certified physician who integrates peptide therapy into comprehensive weight management and hormonal optimization programs. The clinic serves patients across Kent County seeking medical approaches to metabolic health, body composition improvement, and hormone-related wellness concerns. Dr. Macfield's practice focuses on individualized treatment protocols that address the underlying physiological factors affecting weight regulation, energy metabolism, and hormonal balance in both men and women.
The clinic incorporates Sermorelin acetate as a foundational peptide therapy for patients whose growth hormone production has declined with age or metabolic stress. Sermorelin functions as a growth hormone-releasing hormone analog, stimulating the pituitary gland to increase endogenous growth hormone secretion rather than introducing synthetic hormone directly. This approach supports improved body composition by enhancing lean muscle retention while facilitating fat metabolism, particularly in patients whose weight management efforts have plateaued despite diet and exercise modifications. Dr. Macfield evaluates candidates for Sermorelin therapy through comprehensive metabolic panels, body composition analysis, and symptom assessment to determine appropriateness for peptide intervention. The clinic's weight management protocols combine Sermorelin with nutritional guidance, metabolic monitoring, and lifestyle modification strategies tailored to each patient's hormonal profile and health objectives.
Dr. Macfield holds board certification in his medical specialty and has completed BioTE certification, demonstrating specialized training in bioidentical hormone replacement therapy and hormonal optimization protocols. His clinical approach addresses men's health concerns including testosterone deficiency, metabolic syndrome, and age-related performance decline, as well as women's health issues such as perimenopause, menopause-related weight gain, and hormonal imbalances affecting metabolism and body composition. The clinic also provides athletic health care services for active individuals seeking performance optimization, recovery enhancement, and body composition management through medically supervised interventions. Dr. Macfield's dual focus on weight management and hormonal optimization reflects an understanding that sustainable metabolic health requires addressing hormonal function alongside caloric balance and physical activity.
Patients at GR Medical Weight Management receive in-person consultations at the Grand Rapids facility, where Dr. Macfield conducts initial evaluations including medical history review, physical examination, laboratory testing, and discussion of treatment goals. The clinic's assessment process identifies hormonal deficiencies, metabolic dysfunction, and other physiological factors that may impede weight loss or contribute to unwanted weight gain. Treatment plans typically involve regular follow-up appointments to monitor progress through objective measurements including weight, body composition analysis, laboratory markers, and symptom tracking. Patients prescribed Sermorelin receive detailed injection training, dosing protocols, and ongoing clinical supervision to ensure safe administration and optimal therapeutic response. The clinic's approach emphasizes patient education regarding the mechanisms of peptide therapy, realistic expectations for treatment timelines, and the importance of concurrent lifestyle modifications for achieving sustainable results.
GR Medical Weight Management's location in Grand Rapids provides accessible care for residents throughout West Michigan seeking medical weight management solutions beyond conventional diet programs. The clinic's integration of peptide therapy with hormonal optimization distinguishes its approach from standard weight loss centers, offering patients a physiologically-based strategy for addressing metabolic challenges. Dr. Macfield's BioTE certification enables the clinic to offer bioidentical hormone replacement therapy alongside peptide protocols when comprehensive hormonal restoration is indicated. The practice maintains a patient-focused model with in-person care delivery, allowing for hands-on clinical assessment and the development of therapeutic relationships that support long-term metabolic health management. For Grand Rapids area patients experiencing weight management difficulties related to hormonal changes, metabolic slowdown, or age-related body composition shifts, the clinic provides medically supervised interventions designed to address root physiological causes rather than symptoms alone.
Dr. Peter S Macfield· Board-Certified MD
Dr. Peter S Macfield, MD
Board-Certified Family Physician
Dr. Peter Macfield is a board-certified family physician in Grand Rapids, Michigan. Providing holistic, compassionate care for patients of all ages. His services include preventive care, chronic disease management, pediatrics, women’s health, and BioTE-certified hormone replacement therapy. He also offers IV and ozone therapy, along with integrative treatment for conditions such as fibromyalgia, chronic fatigue, and other autoimmune conditions.
Medical Weight Loss Consultation
Comprehensive assessment, personalized goal-setting
Sexual Health Consultation
Customized nutrition and lifestyle program for sustainable results
Follow Up Consultation
Follow up consultation
Growth Hormone Therapy (Sermorelin)
Supports tissue repair, strength, and recovery with physician-guided dosing
Testosterone Therapy (Pellet Therapy)
Restores energy, muscle mass, and mood through targeted hormone replacement. BioTE therapy every 4 months
Bioidentical Hormone Therapy (Pellet Therapy)
Hormone balance to relieve symptoms and boost vitality. BioTE therapy every 3 months
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