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Forest Trail

Functional Medicine Center in Crystal Lake, IL

Promoting Women’s Health through Functional Medicine

Combining traditional and functional medicine to help you experience healing and lasting joy in your health.

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Are you frustrated with the traditional medical approach to your health?

Your optimal well-being is our focus here at SerenityNP. We use an evidence based, comprehensive approach to explore and create an individualized plan. Combining a traditional approach with holistic alternatives, we seek to treat and prevent further illness, leaving you happier and healthier than before.

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Our Services

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Women's Health

Hormone balancing, Lifestyle support, wellness exams, and personal care.

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Functional Medicine

Get to the root cause of your disease and reach optimal health.

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Hormone Optimization

Using the BioTe method of hormone replacement to balance your hormones.

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Lifestyle Support

Sleep habits, proper diets, and custom plan to keep your lifestyle healthy.

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IV Therapy

Infuse your body with vitamins and nutrients to feel rejuvinated.

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Our Process

Phone on Desk


Exploratory Call

Schedule your exploratory call. It's an opportunity for us to meet and briefly discuss your goals and desires and see if we can help.




A 45-60 minute comprehensive consultation where we create a timeline of your medical and emotional journey. This allows us the opportunity to start down your unique pathway to wellness.

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Commit to Your Journey

Functional medicine is not passive. This step includes comprehensive lab testing, nutrition plans, lifestyle recommendations, follow up visits, etc. I will help keep you accountable to achieving your specific desires and goals!

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What Our Patients say

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Client of 6 Years

Cannot say enough great things about Carolyn and her staff! She doesn’t just mask your symptoms with medication, she helps you find the root of the problems and helps you develop a plan to get your body back where it should be.

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Client of 2 Years

This place is fantastic and represents the future of healthcare; preventative, tailored, holistic approaches to fulfilling your health potential for long term success that taking a pill can’t provide.

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Client of 6 Years

Rachel at the front desk is stellar! As someone who despises making phone calls, calling Serenity is easy for me thanks to Rachel. Take charge of your health with the help of Serenity NP. You won’t regret it.

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Client of 4 Years

Carolyn has a non-judgemental attitude and she asks for my thoughts on my treatment and is concerned about my well-being. I know I am in good hands under her care.

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Client of 3 Years

She is very compassionate and looks at the whole person, not just mental conditions and medication but also nutrition, exercise and other factors. You have changed my life and probably saved it!

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Client of 2 Years

She is kind and honest in her responses, very professional. I feel like I've made big improvements with her guidance.

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Realign Your Body So Healing Can Begin

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Start your journey to a healthier you

Get started today with an in-person or virtual visit. We are here to listen and walk with you on your journey, exploring evidence-based solutions related to your experiences to help you heal. We all have a story to tell and desire to be acknowledged, validated, and understood in a compassionate and safe environment. Welcome to Serenity.

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Download these FREE patient health questionnaires!

Often times our feelings and emotions can be confusing and overwhelming, and hard to identify. Here are some free male and female questionnaires to help you identify and define what you are feeling or experiencing.

Female Health Assessment

Male Health Assessment


Carolyn Johnson, WHNP-BC

I've been honored to partake in the care of hundreds of women in the community.

A little bit about me:

  • Master of Science in Nursing from Loyola University / Niehoff School of Nursing in Chicago in 2004

  • Nurse for over 26 years

  • Skilled in treating endocrine, hormone disorders
    utilizing cutting edge, evidence based treatments

  • Advanced Practice Registered Nurse (APRN)

  • Board Certified in Women’s Health

    • Treating mood, hormone related disorders

    • Nutrition guidance

  • Certified Diplomat with the AntiAging, Metabolic and Functional Medicine (FAAMFM) Fellowship through A4M/MMI.

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