Functional Medicine
in Lake Forest, IL
Personalized, Root-Cause Focused Care Designed Around Your Health, Symptoms & Long-Term Wellness
Root-cause care built around your health
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“Allana is knowledgeable, compassionate, and truly listens.” — Yanina A.
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Personalized Functional Medicine at Lake Forest Regenesis
A Comprehensive Approach to Understanding the Factors That May Be Affecting Your Health
Lake Forest Regenesis provides personalized functional medicine care for men and women in Lake Forest, Chicago’s North Shore, and Lake County.
Functional medicine takes a broader view of health by considering how symptoms, medical history, lifestyle, nutrition, hormones, metabolism, medications, and other factors may interact and contribute to how you feel.
Care is led by Allana Bush, FNP-C, a family nurse practitioner with 22 years of healthcare experience, and your plan is built around your history, symptoms, labs when appropriate, and goals rather than one symptom in isolation.
Whole-Person Evaluation • Personalized Care • Metabolic & Hormone Health • Lifestyle Support • Ongoing Monitoring
What Is Functional Medicine?
Looking Beyond Symptoms to Understand the Bigger Picture
Functional medicine is a patient-centered approach that looks at how multiple factors may interact and contribute to your health concerns, rather than viewing each symptom in isolation. The goal is to understand why your symptoms may be happening, not only what they are.
Evaluation may include your medical history, symptoms, nutrition, sleep, stress, physical activity, medications, metabolic health, hormones and other lifestyle factors. For example, fatigue can be connected to sleep, iron levels, thyroid function or blood sugar, and looking at them together helps avoid treating one piece while missing another. Your provider explains what may be connected and why.
How Functional Medicine Works
Connecting History, Lifestyle & Clinical Findings
Functional medicine brings together your symptoms, health history, lifestyle, medications, nutrition, sleep, stress and laboratory findings when appropriate to look for patterns that may be affecting your health.
Rather than focusing on one concern at a time, your provider considers how metabolic health, hormone health, digestion, recovery and daily habits may overlap. Your plan may combine targeted lab testing, nutrition and lifestyle changes, and treatment when clinically appropriate. Findings are reviewed with you, and follow-up visits track how you’re responding so the plan can be adjusted as your needs change.
Common Reasons Patients Seek Functional Medicine
A Broader Evaluation Can Help Connect Symptoms, Lifestyle & Overall Health
Patients often seek functional medicine for persistent fatigue. Ongoing fatigue may be influenced by sleep, stress, nutrition, hormone changes, or metabolic health. Others want help with weight and metabolic concerns, sometimes alongside medical weight management, or with energy, mood, sleep, and body changes that may connect to hormone optimization.
Digestive symptoms, poor sleep, and chronic stress are also common reasons to start, since they can affect energy, mood, appetite, and recovery. Some patients simply want a whole-person health approach to healthy aging and a clearer picture of their metabolic health.
Always tired and not sure why? Our free, 2-minute Fatigue Check shows how tiredness is affecting you and which common causes may be worth checking.
From Root Cause to the Right Care Path
Understanding Why Symptoms May Have More Than One Contributing Factor
Many ongoing health concerns are influenced by more than one factor. Symptoms such as fatigue, weight changes, sleep disruption, digestive concerns, or changes in mood may overlap with nutrition, stress, medications, hormone health, metabolic health, sleep quality, and lifestyle patterns.
This broader evaluation may help identify areas where changes in nutrition, lifestyle, metabolic health, hormone balance, or other clinically relevant factors could support your overall care plan.
Two parts of our functional medicine care focus on these questions directly: comprehensive lab testing, drawn in our office, and gut health care for bloating, irregularity and other digestive concerns.
Your First Visit
A Calm Place to Start
Visits take place in our welcoming Lake Forest office, where Allana reviews your history, labs and goals with you line by line.
- One-on-One Visits
- Labs Reviewed With You
- Easy Parking
What Your Functional Medicine Program May Include
Personalized Care Designed Around Your Health History, Symptoms & Goals
Health History Review
Your program begins with a review of your symptoms, medical history, medications, lifestyle, nutrition, sleep, stress, and health goals to better understand the factors that may be affecting how you feel.
Laboratory Assessment
Labs drawn at your initial consultation help evaluate metabolic health, hormone concerns, nutrient status, and other markers that help guide your care plan.
Learn More About Lab Testing
Personalized Care Plan
Your recommendations are developed around your clinical findings, symptoms, lifestyle, priorities, and treatment goals rather than using the same standardized approach for every single patient.
Ongoing Follow-Up
Regular follow-up helps your provider evaluate symptom changes, laboratory findings, treatment response, and evolving health needs so your care plan can be thoughtfully adjusted over time.
What to Expect From Functional Medicine Care
A Personalized Process That Evolves With Your Health & Response
Functional medicine care is individualized, and progress may occur gradually as different factors affecting your health are identified and addressed over time.
During follow-up, your provider may evaluate changes in energy, sleep, digestion, stress, weight, hormone-related symptoms, metabolic health, and other concerns that were identified during your initial evaluation.
Functional Medicine & Hormone Health
Understanding the Connection Between Hormones, Metabolism & Overall Wellness
Hormonal changes can influence energy, sleep, mood, body composition, sexual wellness, and metabolic health, but these symptoms may also be affected by lifestyle, medications, stress, nutrition, and other medical factors.
Functional medicine can help place hormone-related concerns within the broader context of your overall health, symptoms, laboratory findings, and stage of life rather than evaluating hormones in isolation.
When clinically appropriate, hormone optimization may be considered as part of a more comprehensive care plan that also addresses sleep, nutrition, physical activity, metabolic health, and other contributing factors.
Functional Medicine & Weight Management
Looking at Metabolism, Lifestyle, Hormones & Other Factors That May Affect Weight
Weight management can be influenced by more than nutrition and exercise alone. Factors such as sleep, stress, medications, hormone changes, metabolic health, activity level, and lifestyle patterns may also affect a person’s ability to lose or maintain weight.
For patients with ongoing weight concerns, a medical weight loss program may be incorporated when clinically appropriate alongside nutrition, activity, lifestyle support, and ongoing medical monitoring.
Benefits of Personalized Functional Medicine Care
Whole-Person Support Designed Around Your Health, Symptoms & Long-Term Goals
Whole-Person Care
Functional medicine looks at symptoms, health history, lifestyle, medications, nutrition, sleep, stress, hormones, and metabolic health together rather than each concern in isolation.
Metabolic Health
Care may address factors related to weight, blood sugar regulation, energy, body composition, and overall metabolic health when those concerns are clinically relevant.
Hormone Health
When appropriate, functional medicine may incorporate evaluation of hormone-related symptoms and metabolic factors as part of a broader whole-person approach.
Lifestyle Guidance
Recommendations may include support for nutrition, sleep, physical activity, stress management, and sustainable daily habits that can influence long-term health.
Functional Medicine & Mental Wellness
Looking at the Physical, Lifestyle & Metabolic Factors That Can Influence Emotional Well-Being
Mental wellness can be influenced by many interconnected factors, including sleep, stress, nutrition, hormone changes, metabolic health, medications, physical activity, and other medical conditions.
At Lake Forest Regenesis, functional medicine considers emotional and cognitive concerns within the broader context of your overall health, symptoms, lifestyle, and clinical findings rather than viewing mental wellness completely separately from physical health.
When appropriate, your care plan may address modifiable factors that could be contributing to concerns involving mood, stress, focus, motivation, sleep, or overall emotional well-being while recognizing when additional behavioral health or specialist care may be appropriate.
Functional Medicine & Peptide Therapy
When Appropriate, Peptide Therapy May Be Considered as Part of a Broader Care Plan
Functional medicine and peptide therapy can sometimes overlap when care is focused on metabolic health and body composition. Many peptides are not FDA-approved and evidence for their use is limited, so options are discussed only when clinically appropriate.
At Lake Forest Regenesis, peptide therapy is considered only after a medical evaluation that reviews your health history, symptoms, medications, clinical findings, and treatment goals.
When peptide treatment is appropriate, it is used as part of a broader plan rather than as a stand-alone solution. Care may also address nutrition, sleep, activity, hormone health, metabolic factors, and other relevant areas.
Functional Medicine & Direct Primary Care
Whole-Person Care Within an Ongoing Primary Care Relationship
Functional medicine looks at how symptoms, metabolism, hormones, nutrition, and lifestyle connect. Direct Primary Care offers an ongoing primary care relationship with Allana for everyday health needs, from sick visits to preventive care and physicals.
The two are separate. A Direct Primary Care membership does not include a functional medicine program, and functional medicine care does not require a membership. For patients who choose both, the same provider knows the fuller picture of their health over time.
Is Functional Medicine Right for You?
Is Functional Medicine Right for You?
Who May Be a Candidate for Functional Medicine?
Functional medicine may be appropriate for adults who are experiencing persistent symptoms, multiple overlapping concerns, or health changes that may involve several contributing factors.
Potential candidates may be dealing with concerns related to fatigue, metabolism, hormone health, digestion, sleep, stress, weight, or overall wellness and want a more comprehensive evaluation.
At Lake Forest Regenesis, candidacy is based on your medical history, current symptoms, medications, existing diagnoses, laboratory findings when appropriate, and personal health goals.
Functional medicine may also appeal to patients who want a more individualized, prevention-focused approach while continuing to receive appropriate conventional medical care when needed.
Who May Not Be a Candidate for Functional Medicine?
Functional medicine may not be appropriate as the primary approach for patients with urgent symptoms, unstable medical conditions, or concerns that require immediate diagnostic evaluation or specialist care.
It may also be a poor fit for patients seeking a single test, supplement, or treatment to explain every symptom without considering broader medical causes or conventional standards of care.
At Lake Forest Regenesis, your provider considers your medical history, medications, existing diagnoses, symptoms, risk factors, and current level of medical stability before determining whether functional medicine is appropriate.
If another type of care is more suitable, referral, additional testing, or coordination with your primary care provider or specialist may be recommended.
Clinical Oversight & Safety
Before recommendations are made, your provider considers your medical history, current medications, symptoms, laboratory findings when appropriate, existing diagnoses, and individual risk factors.
Functional medicine should complement—not replace—appropriate conventional medical care. New or concerning symptoms may require additional evaluation, referral, diagnostic testing, or treatment outside the scope of a functional medicine plan.
During care, follow-up helps evaluate symptom changes, treatment response, laboratory findings, and overall health while identifying when recommendations should be adjusted.
Your plan may change based on new clinical information, evolving health needs, medication considerations, or other medical concerns to help keep care appropriate and individualized.
When We Refer to a Specialist
If your evaluation points to something beyond Allana's scope, such as signs of a serious digestive condition, an autoimmune or endocrine disorder that needs specialist management, or symptoms that need urgent or specialized testing, she refers you to the right specialist and helps coordinate next steps.
Medical Disclaimer
This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. All therapies are prescribed only after a comprehensive medical evaluation by a licensed provider. Results and outcomes may vary. Click for Full Disclaimer
Meet Your Functional Medicine Provider
Personalized Whole-Person Care Led by an Experienced Family Nurse Practitioner
Functional medicine care at Lake Forest Regenesis is led by Allana Bush, FNP-C, RN, PHN, MSN, a family nurse practitioner with 22 years of healthcare experience.
Her clinical focus includes functional and regenerative medicine, hormone optimization, medical weight management, metabolic health, and personalized wellness care. Allana evaluates symptoms within the broader context of each patient’s health history, medications, lifestyle, laboratory findings, and individual goals.
Patients receive ongoing medical guidance and follow-up so their care plan can evolve based on symptom response, clinical findings, changing health needs, and long-term wellness priorities.
Related Reading
Symptom & Lab Articles From Our Patient Education Library
Frequently Asked Questions About Functional Medicine
Answers to Common Questions About Whole-Person, Personalized Medical Care
What is functional medicine?
Functional medicine is a patient-centered approach that considers how medical history, symptoms, lifestyle, nutrition, sleep, stress, hormones, metabolism, medications, and other factors may interact and influence health.
How is functional medicine different from conventional medical care?
Functional medicine takes a broader look at patterns and contributing factors that may be connected to ongoing symptoms. It is intended to complement appropriate conventional medical care rather than replace necessary diagnostic testing, medications, or specialist treatment.
What types of symptoms can functional medicine evaluate?
Patients may seek functional medicine for concerns involving fatigue, weight, metabolism, hormone changes, digestion, sleep, stress, or general wellness. Symptoms are evaluated in context because many concerns can have multiple possible causes.
Does functional medicine include laboratory testing?
Laboratory testing may be used when clinically appropriate to better understand metabolic health, hormone-related concerns, nutrient status, or other relevant health markers. Testing is selected based on your individual symptoms and medical history rather than using the same panel for every patient.
Can functional medicine help with hormone or metabolic concerns?
Yes. Functional medicine can consider hormone and metabolic concerns within a broader health assessment. When appropriate, care may involve hormone optimization or medical weight management based on your individual needs.
How long does functional medicine care typically last?
There is no single timeline for everyone. The length of care depends on your symptoms, health goals, clinical findings, treatment response, and changing needs. Some patients need shorter-term evaluation, while others benefit from ongoing follow-up and long-term management.
Start Your Regenesis Today
Take the Next Step Toward Personalized, Whole-Person Care
Your first step is a consultation focused on understanding your symptoms, health history, medications, lifestyle, nutrition, sleep, stress, and personal health goals. This helps create a more complete picture of the factors that may be affecting how you feel.
Your initial consultation is a 90-minute visit with Allana that includes your lab draw, followed by a 90-minute visit to review your results and options.
Regular follow-up helps monitor symptom changes, laboratory findings when appropriate, treatment response, and evolving health needs. The goal is to build a personalized approach that can adapt over time while supporting long-term health, metabolic wellness, and overall well-being.
Results vary, and no treatment can be guaranteed. See our Medical Disclaimer.
A Personal Message From Your Provider
Your Health Should Be Evaluated as a Whole, Not as a Collection of Separate Symptoms
“My goal is to help patients better understand the patterns and contributing factors that may be affecting how they feel. Symptoms do not always exist in isolation, which is why I believe it is important to look at health history, lifestyle, medications, metabolic health, hormones, and other relevant factors together.
I want patients to understand their options, ask questions, and have a care plan that can evolve as their symptoms, health needs, and long-term goals change. The goal is thoughtful, personalized care that supports better understanding of your health and sustainable long-term wellness.”
Allana Bush, FNP-C, RN, PHN, MSN
Medical Weight Management & Hormone Optimization
Lake Forest, IL