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Writer's pictureDr. Leila Doolittle

Supporting Immune Health for the Entire Family: Stock your Shelves for Acute Illness Treatment & Prevention

Updated: Oct 29

Building Resilience with Phytonutrients and Strategic Supplementation


A strong immune system is essential for protecting our bodies from the pathogens, viruses, and bacteria that we encounter every day. While the immune system is highly sophisticated and capable of protecting us against countless invaders, it requires balanced nutrition, lifestyle support, and strategic supplementation to function optimally. In Functional Medicine, we approach immunity holistically, looking beyond simple symptom management to understand how each element in the body works together to create resilience.


This article explores a Functional Medicine approach to immunity, focusing on the benefits of a phytonutrient-rich diet, immune-boosting supplements, and protocols for acute illness management. By empowering the body’s innate ability to fight illness, this approach fosters a foundation of lifelong health and vitality.



1. The Functional Medicine Perspective on Immune Health

Functional Medicine views the body as an interconnected system in which each part, from the digestive system to the nervous system, influences the whole. When considering immune health, Functional Medicine recognizes that nutrition, lifestyle habits, environmental exposures, and stress levels all contribute to the immune response. Rather than merely preventing illness, the goal is to build resilience—equipping the body to respond quickly and effectively when it does encounter threats.


The Concept of Immune Resilience


Immune resilience is the body’s ability to recognize, respond to, and recover from threats. Unlike traditional approaches that may focus solely on eradicating pathogens, Functional Medicine emphasizes nurturing immune resilience by supporting the systems that regulate the immune response, like the gut microbiome, hormonal balance, and oxidative stress management.


Resilience is developed through a consistent focus on balanced nutrition, quality sleep, stress management, and nutrient-rich supplementation. In particular, a diet rich in phytonutrients—bioactive compounds found in colorful plant foods—provides the body with powerful tools to fend off illness, regulate inflammation, and maintain a healthy immune response.


Dr. Leila Doolittle recommends following a functional medicine whole food phytonutrient rich diet with organic whole foods to fuel the Immune System
Dr. Leila Doolittle recommends following a functional medicine based phytonutrient rich diet with organic whole foods to fuel the Immune System

2. The Power of a Phytonutrient-Rich Diet

Plants provide more than just vitamins and minerals; they are packed with phytonutrients—compounds like flavonoids, polyphenols, and carotenoids that offer unique protective benefits. Phytonutrients support immune function by neutralizing free radicals, reducing inflammation, and strengthening cell membranes, allowing immune cells to function at their peak. Eating a "rainbow" of colorful fruits and vegetables ensures that we receive a variety of these beneficial compounds.


Key Phytonutrient Groups and Their Benefits

Each color in fruits and vegetables represents different types of phytonutrients, each of which offers unique immune-supporting properties:

  • Red Foods: Red fruits and vegetables like tomatoes, red peppers, and strawberries contain antioxidants like lycopene and anthocyanins. These compounds are known to reduce inflammation, protect cells from damage, and support heart health, which is closely linked to immune function.

  • Orange and Yellow Foods: Foods such as carrots, sweet potatoes, and citrus fruits are rich in beta-carotene, a precursor to vitamin A. Vitamin A is essential for mucosal immunity, the body's first line of defense against pathogens.

  • Green Foods: Leafy greens, broccoli, and green peppers are high in chlorophyll and vitamin C, which support detoxification processes and bolster immune defenses. Cruciferous vegetables like broccoli and Brussels sprouts also contain sulforaphane, a potent compound that boosts antioxidant defenses in cells.

  • Blue and Purple Foods: Berries, grapes, and eggplants are packed with anthocyanins and resveratrol, which help to protect cells from oxidative stress and inflammation. These compounds have been shown to improve immune cell function and reduce susceptibility to infection.

  • White and Brown Foods: Garlic, onions, mushrooms, and ginger may lack the vibrant colors of other foods but are equally powerful for immune health. Compounds like allicin in garlic and beta-glucans in mushrooms enhance white blood cell activity and improve the immune response.


The Role of Gut Health in Immune Function

A significant portion of the immune system—around 70%—resides in the gut, where it encounters external pathogens and foreign substances daily. A phytonutrient-rich diet supports the gut microbiome, the diverse community of beneficial bacteria in the digestive tract that plays a vital role in immune health. Foods high in fiber and prebiotics, such as leafy greens, apples, and artichokes, feed beneficial gut bacteria, promoting a balanced microbiome that can effectively support immunity.


To strengthen gut health, it’s essential to reduce or eliminate inflammatory foods like refined sugars, processed foods, and artificial additives. These substances can disturb the gut microbiome and weaken immune defenses. A balanced, phytonutrient-rich diet lays the groundwork for gut health, fostering a microbiome that supports resilience against infections.


3. Immune-Boosting Supplements: Establishing Daily Resilience

A phytonutrient-rich diet forms the backbone of immune resilience, but targeted supplements provide additional support, especially during times of increased exposure or seasonal changes. By establishing a consistent supplement regimen, we can build a more resilient immune system, preparing it to respond effectively when faced with illness. Dr. Leila Doolittle’s Functional Medicine approach incorporates supplements curated in a Fullscript plan, providing accessible options for families to strengthen their immunity with precision.






Essential Daily Immune-Boosting Supplements

Immune Charge+™: This powerful immune-boosting formula, featuring vitamins and botanical extracts, is designed to fortify defenses against common pathogens. Taken as a preventative measure, adults and children over 100 lbs can take a full shot every third day to support immune strength. For those between 50–100 lbs, it’s recommended to divide a single shot into two doses taken four hours apart. This targeted dosing maximizes absorption and supports long-term immune resilience.

Biocidin LSF Liposomal Formula Liquid: Known for its potent immune-supportive properties, Biocidin helps defend the body against various pathogens. For immune support, adults and children over 100 lbs should take 2 sprays each morning. Dosing adjustments are provided for children under 100 lbs, ensuring a tailored approach that fits individual needs. This formula also supports gut health, enhancing immune balance at the foundational level.


Propolis Drops: Propolis has long been valued for its immune-modulating and anti-inflammatory properties. For preventative immune support, adults can take 40 drops each morning with food, with dosing adjustments for children under 100 lbs. These drops are beneficial for maintaining respiratory and immune health, especially during times of high exposure.


Echinacea Royal: Echinacea, known for its immune-enhancing properties, helps strengthen white blood cell activity. This tincture, with 40 drops for adults each morning, provides long-term support for overall immunity. Echinacea is particularly helpful in the fall and winter months, fortifying immune defenses against seasonal challenges.


These supplements are all available in a dedicated Fullscript protocol designed by Dr. Doolittle, making it easy for families to build a consistent, immune-strengthening regimen with reliable, evidence-based products.




4. Strategic Supplementation During Acute Illness: Supporting Rapid Recovery

When illness does strike, the immune system benefits from an intensified supplement protocol to speed recovery and reduce symptom severity. Dr. Doolittle’s Fullscript protocol includes carefully selected supplements that target specific symptoms, manage inflammation, and provide immediate immune support. Each supplement in this acute protocol is designed to be effective and safe for short-term use.


Recommended Supplement Protocols for Acute Illness


Immune Charge+™: This powerful formula becomes even more essential during acute illness. For adults and children over 100 lbs, one full shot each morning is recommended for the duration of illness. For children weighing between 50–100 lbs, a single shot can be divided into two doses, one in the morning and another four hours later. For children under 50 lbs, the shot can be divided into smaller doses taken every 4 hours. This dosing schedule supports the immune system in quickly mounting an effective response.


Biocidin LSF Liposomal Formula Liquid: For immune resilience during acute illness, Biocidin can be taken every 4 hours by adults and children weighing over 100 lbs (2 sprays per dose) to boost immune response and fight off pathogens. For younger children, doses are adjusted based on weight to ensure efficacy without overloading. This dosing frequency maximizes Biocidin’s benefits, supporting respiratory and gut health during illness.


Biocidin® TS Daily Herbal Throat Spray: For throat discomfort, use 3 sprays in the throat as needed for relief. This spray contains soothing botanicals that ease irritation and support a healthy throat environment, preventing secondary infections and enhancing comfort.


Propolis Drops: During illness, propolis serves as a powerful immune activator. Adults can take 40 drops each morning with food for an extra boost, while children’s dosages are adjusted for weight. Propolis is particularly useful for respiratory support, providing antimicrobial benefits to address symptoms at the onset.


Propolis Nasal Spray - Sinus Congestion Support: For sinus congestion, this nasal spray provides immediate relief. Spray twice in each nostril as needed throughout the day but avoid using it after 2 pm to prevent sleep disruption. Its natural propolis content helps clear sinuses and supports a healthy respiratory tract.


Kid's Propolis Immune Support Spray: Specifically designed for children, 4 sprays twice a day are recommended for children aged 2-12 to provide gentle yet effective immune support during illness. This spray is easy to administer, making it a family-friendly solution to support immunity in young ones.


Echinacea Royal: During illness, Echinacea can be taken up to 3 times daily to provide consistent immune support. Adults should take 40 drops in the morning, afternoon, and evening, with weight-adjusted doses available for children. This concentrated formula enhances the body’s immune response, allowing it to fight off illness with increased efficacy.


Zingiber Officinale (Ginger): Ginger supports digestive and immune health, which is especially useful during stomach-related symptoms of illness. Adults can take 40 drops in water in the morning with food, with adjusted dosing for children. Ginger’s natural anti-inflammatory properties provide comfort and immune activation, aiding in quicker recovery.

Each of these supplements is included in a structured Fullscript protocol designed to meet the demands of both daily immune resilience and acute illness recovery. By following this structured approach, families can access a targeted toolkit for prevention and intervention, ensuring comprehensive immune support year-round. This plan empowers families with the resources to safeguard health proactively and respond effectively to illness when it arises.



5. Lifestyle Practices to Enhance Immune Resilience

Beyond diet and supplements, certain lifestyle habits significantly contribute to immune resilience. Functional Medicine emphasizes these foundational practices as part of a comprehensive immune support strategy.


Quality Sleep

Sleep is crucial for immune function. During sleep, the body produces cytokines—proteins that target infection and inflammation. Aim for 7-9 hours of quality sleep each night, practicing good sleep hygiene (e.g., limiting screen time, setting a consistent bedtime) to improve the body’s natural defense mechanisms.


Stress Management

Chronic stress suppresses immune function by elevating cortisol levels, which can inhibit white blood cell production and reduce the immune response. Techniques like mindfulness meditation, deep breathing, and yoga can lower cortisol levels, supporting immune health.


Regular Exercise

Moderate, regular exercise promotes healthy circulation, which enhances the movement of immune cells throughout the body. Physical activity, even just 30 minutes of walking a day, boosts immunity by reducing inflammation and stress.


Limiting Toxin Exposure

Environmental toxins, such as pesticides, pollutants, and chemicals in personal care products, can weaken immune resilience. Choosing organic foods, using non-toxic household products, and filtering drinking water can reduce exposure to these immune-suppressing toxins.


Building a Strong Immune System for Lifelong Health

Building immune resilience isn’t about avoiding every illness but equipping the body to respond effectively when illness does occur. Functional Medicine offers a powerful approach to immune health by focusing on root causes, prevention, and resilience. Through a diet rich in phytonutrients, strategic daily supplements, and targeted support during acute illness, individuals can create a foundation of health that helps the immune system function optimally.


As we embrace these Functional Medicine principles, we empower our bodies with the nutrients, lifestyle support, and tools needed to thrive. In a world filled with daily health challenges, investing in immune resilience is one of the most effective ways to ensure long-term vitality, adaptability, and well-being.

Dr. Leila Doolittle loves providing functional medicine treatments for the entire family, including infants and children.
Dr. Leila Doolittle loves providing functional medicine treatments for the entire family, including infants and children.

Your Family’s Immune Health: Beyond Basic Prevention

Investing in immune health is one of the most proactive steps you can take to support your family’s well-being. With a functional approach, you can go beyond traditional immunity support to address the root factors that influence health, including digestion, sleep, stress, and even genetic predispositions. At Resonance Wellness, my mission is to empower families with comprehensive, customized strategies that support the body’s innate defenses and create a foundation of wellness for the entire family.


Why Functional Medicine is Essential for Immune Resilience

Functional Medicine is uniquely positioned to help families achieve optimal health because it considers the body as an interconnected system. By working with a Functional Medicine practitioner, you’re able to gain insight into how different lifestyle factors, nutritional deficiencies, and even environmental exposures might be impacting your family’s immunity. Together, we’ll develop a protocol that is specific to your family’s needs, addressing not only immune resilience but also gut health, detoxification, and stress response—all of which play vital roles in a robust immune system.





Comprehensive Immune Protocols Tailored to Your Family

While a basic protocol can offer some benefits, a tailored plan crafted through a Functional Medicine lens offers depth and precision, customized to meet each family member’s unique health status, nutritional needs, and lifestyle. When you schedule a Functional Medicine visit, we’ll dive deep into the factors impacting each individual’s health, assessing key areas such as:


  • Nutrient Deficiencies: Essential nutrients like vitamin D, vitamin C, and zinc play crucial roles in immune function, and many people unknowingly suffer from low levels. Through precise supplementation and diet adjustments, we’ll ensure that each family member’s nutrient needs are met.

  • Gut Health and Microbiome Balance: Since nearly 70% of the immune system is located in the gut, it’s essential to address any gut imbalances or sensitivities. A tailored protocol will focus on nourishing beneficial gut bacteria, supporting a balanced microbiome, and enhancing digestive health to foster strong immunity.

  • Stress Management and Hormonal Balance: Chronic stress is one of the greatest suppressors of immune function. By incorporating stress management techniques and addressing hormonal balance, we’ll build resilience from within, helping your family respond to stressors more effectively without compromising immunity.

  • Targeted Immune Support for Acute Illness: Beyond prevention, your protocol will include a robust plan for times of acute illness. Together, we’ll develop an immediate-response protocol that includes the ideal dosages of supplements and herbs tailored to each family member, helping to reduce the severity and duration of symptoms.





Upgrade Every System for a Lifetime of Health

True wellness extends beyond immune resilience, encompassing all systems within the body. With a Functional Medicine visit, I’ll work with you to address key areas that impact overall health, such as cellular energy production, detoxification pathways, hormonal balance, and neurological health. The goal is not just to prevent illness but to help each family member thrive physically, mentally, and emotionally, empowering them to feel their best every day.


When you partner with Resonance Wellness, you’re investing in a personalized journey that supports health on every level—from nourishing the body’s cells to uplifting its immune defense mechanisms. A holistic immune protocol can pave the way for a more resilient, vibrant family, giving you the peace of mind that you’re equipped to navigate seasonal challenges and everyday health with confidence.


Ready to Elevate Your Family’s Health? Schedule Your Functional Medicine Visit Today

There’s no better time to invest in a comprehensive, proactive approach to health. Whether you’re looking to enhance your family’s immune resilience, support natural detoxification, or balance gut health, a Functional Medicine visit offers a customized roadmap to achieving these goals. Together, we’ll uncover the root causes that may be impacting your family’s health, crafting a protocol that empowers each member to live with vitality, resilience, and joy.


Take the first step towards lasting wellness for your family today. Schedule a Functional Medicine visit with me to discover the power of a tailored, comprehensive immune protocol that fits your family’s unique needs. 


Let’s build a foundation of health that supports your loved ones in thriving now and for a lifetime.

By scheduling a visit, you’ll receive a detailed plan designed to address the underlying factors that influence your family’s immunity, energy, mood, and overall health. Click below to book your consultation, and let’s begin a transformative journey to optimize your family’s health, support immune resilience, and create a legacy of wellness!





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