SAVE 15% ON EVERY ORDER with FREE shipping over $29.

Immune System and the Foundations of Health

Immune System and the Foundations of Health

by Ani Bajaj (NTP, RHP, FBCS)

 

When you remove stressors, you strengthen the defenses!

Every organism is like a bucket, constantly taking some things in and letting other things go. When our immune bucket gets full and starts to overflow, inflammation and undesirable symptoms are a natural consequence and have become quite common.

Immune-related symptoms and conditions include airborne allergies, eczema, asthma, cancer, celiac disease, chronic cold, chronic fatigue syndrome, gut dysbiosis, IBS, Hashimoto’s, sinus congestion, Lyme, Crohn’s etc.

 

The Immune System Organs and Tissues

The Immune system includes three main sub-systems:

1. The Integumentary System (Your First Line of Defense)

Your skin, hair, nails, and mucous membranes form a protective barrier that keeps harmful germs and environmental toxins from entering your body. Healthy skin acts like a shield, preventing infection before it even has a chance to begin.

2. The Digestive System (Where Much of Your Immune System Lives)

Approximately 70–80% of your immune system is associated with your gut. Your digestive tract is home to trillions of beneficial bacteria that help regulate immunefunction, reduce inflammation, and protect against harmful microbes. Good digestion, a healthy gut lining, and a balanced microbiome are essential for a strong immune system.

3. The Lymphatic System (Your Body's Cleanup and Transport Network)

The lymphatic system is a network of vessels, lymph nodes, and organs that help remove waste, toxins, excess fluid, and harmful microorganisms from the body. It also transports immune cells to where they are needed most, allowing your body to recognize and respond quickly to infections.

 

Understanding Inflammation and Antioxidants

Inflammation is your body's natural healing and defense response. When you are exposed to an infection, injury, toxin, or other stressor, your immune system creates inflammation to protect you and begin the healing process. In the short term, this is healthy and necessary. The goal is for the body to resolve the inflammation once healing has occurred.

The inflammatory process has two important steps:

1. The body sends immune cells to the affected area.

Blood vessels and lymphatic vessels widen, allowing immune cells, nutrients, and healing compounds to reach damaged or infected tissues more easily.

2. The body fights harmful invaders.

Your immune system produces substances called free radicals (also known as reactive oxygen species) that help destroy bacteria, viruses, and other harmful organisms. While these are important for defense, too many free radicals can also damage healthy cells if they are not kept in balance.

This is where antioxidants become essential.

What are antioxidants?

Antioxidants protect your cells by neutralizing excess free radicals before they can cause damage. They help reduce oxidative stress, which is linked to aging, inflammation, heart disease, diabetes, and many other chronic health conditions.

Your body naturally produces some antioxidants, including:

  • Glutathione
  • Coenzyme Q10 (CoQ10)
  • Alpha-lipoic acid
  • Catalase
  • Bilirubin
  • Melatonin

You also get antioxidants from the foods you eat, including:

  • Vitamin C
  • Vitamin E
  • Beta-carotene (found in orange and dark green vegetables)
  • Selenium
  • Zinc
  • Plant compounds called polyphenols, which are abundant in berries, colorful fruits and vegetables, herbs, spices, green tea, olive oil, and dark chocolate.

The following are dietary factors that have a negative impact on immune health:

  • Insufficient fiber – need sufficient fiber diversity to support a health microbiome
  • Imbalanced macronutrients – a balance of whole food fat, carbs and protein is important optimal immune function
  • Inflammatory foods – processed/ refined foods, additives, preservatives.
  • Micronutrient cofactor deficiencies leading to suppressed immunity
  • Over or under consumption of calories
  • Glycation – both from overcooked meats and hyperglycemia.

The goal isn't to eliminate inflammation—it's to keep it balanced. A healthy immune system needs inflammation to protect and heal the body, but it also needs enough antioxidants to turn the inflammatory response off when it's no longer needed. A nutrient-dense diet, regular physical activity, quality sleep, stress management, and healthy digestion all help maintain this balance and support long-term health.

NOW, HOW DOES IMMUNE HEALTH APPLY TO THE FOUNDATIONS?

 

DIGESTION

Healthy digestion may be the most important foundational factor in a healthy immune function. Here are various ways that digestive dysfunction may negatively impact immune health.

Upper GI – With inadequate hydrochloric acid and pepsin production, macronutrients, (especially protein) are left partially digested or undigested. This may set the body up for food reactions but also allow harmful microbes to survive and reproduce through the digestive tracts.

Small intestine – When undigested macronutrients and microbes move into the small intestine, they have potential to inflame and damage the mucosal layer of the intestinal wall. Undigested proteins may be particularly problematic as they are more likely to trigger an adaptive immune response. Without a healthy mucosal lining, tight cellular functions for the epithelium may weaken. These same undigested foods particles and microbes can now move through an inappropriately permeable intestine and into the bloodstream (known as leaky gut). The food particles may appear as foreign to the body and trigger an immune response. Genetics and the health of the microbiome will have a significant effect on the specific immune response and the way it manifests in the body.

Large intestine – Pathogenic microbes that migrate through the digestive tract and into the large intestine can crowd out the healthy bowel flora, leading to overgrowth of parasites, fungus and aggressive bacteria. The microbiome is mainly disturbed by antibiotics, stress and diet. This includes high percentages of refined and processed carbohydrates, sulfates and sulfites.

Healthy digestion is critical to healthy immune function. And healthy hydrochloric acid production (stomach acid) is essential for optimal food disinfection and breakdown. Support healthy liver and gallbladder function for optimal complement protein production, energy production and elimination of immune products and waste materials. Support small intestine function and a healthy mucosal lining with tight cellular junctions. This provides a health terrain on which beneficial bacteria can reside. Support healthy large for bowel regularity.

Micronutrients like magnesium, B vitamins, zinc, nutrient dense water (with appropriate electrolytes), digestive bitters, prebiotic fibers, probiotic strains, gut-supportive plants such as milk thistle, dandelion root, slippery elm, chlorophyll can be helpful.

 

BLOOD SUGAR

One of the most important ways to support a healthy immune system is by keeping your blood sugar as stable as possible. Frequent spikes and crashes in blood sugar can increase inflammation and contribute to a process called glycation, where excess sugar attaches to proteins and damages cells and tissues over time.

A simple way to help keep blood sugar steady is to eat macronutrient balanced meals that include:

  • Protein- to support muscle, hormones, and immune function.
  • Healthy fats- to slow digestion and provide lasting energy.
  • Fiber-rich foods - like vegetables, legumes, nuts, seeds, and whole foods to help slow the absorption of sugar into the bloodstream.

Why This Matters During Illness or Chronic Inflammation

When your immune system is working hard—whether you're fighting an infection or dealing with ongoing inflammation, your body naturally needs more energy. During these times, it becomes temporarily less sensitive to insulin so that more glucose (sugar) is available for your immune cells, which rely on it to fight infection and repair tissues.

Because of this, some people may experience symptoms of low blood sugar, such as fatigue, shakiness, brain fog, or irritability, even when they are eating balanced meals.

The goal isn't to avoid carbohydrates altogether. Instead, choose nutrient-dense, high-fiber carbohydrates that provide steady energy, such as:

  • Vegetables
  • Berries
  • Beans and lentils
  • Sweet potatoes
  • Quinoa
  • Oats (if tolerated)

These foods help fuel your immune system while minimizing large blood sugar spikes.

Rather than following extreme diets or eliminating carbohydrates, the goal is to provide your body with a steady supply of nutrients and stable energy. Balanced meals, regular meal timing, and choosing whole, nutrient-dense food, helps support both healthy blood sugar regulation and a strong, resilient immune system.

 

HYDRATION

Water is needed by all mucous membranes to stay moist and keep barrier immunity strong. The lymphatic system, which is the staging ground for the adaptive immune response, relies on proper hydration to transport immune components. In addition, dehydration can exaggerate histamine activity= hence histamine symptoms. Therefore, it is important to drink adequate amount of water per day, and supplement with bio-individual electrolyte nutrients.

 

STRESS

It is important to address areas of stress in one’s life. Managing stress can be key in improving one’s immune function.

Common stressors include:

  • Environmental allergens or triggers
  • Lack of sleep
  • Over-training
  • Under-eating• Trauma
  • Work Stress
  • Family Stress

Managing stress via eliminating household toxins or allergens, having a calming sleep routine, the 3 M’s (mindfulness, meditation and movement), journaling, spending more time with loved ones and establishing time for hobbies or other motivating activities can be supportive.

As Functional Nutritional Practitioners we support the foundations like – Digestion/ Blood Sugar/ Hydration and Stress with diet, applicable supplementation and lifestyle factors, we provide the body with the nourishment it needs. Maintaining optimal, long-term immune health and physiological balance is the goal and nutrient dense whole foods and healthy habits are the means!

The information presented is intended for informational and educational purposes only and hasn't been evaluated by the Food and Drug Administration. The content is intended to be helpful and informative, but it isn't intended to diagnose, treat, cure, or prevent any condition or disease, nor is it medical advice.

 

Recommended Immune Support Supplements

Nourish and Flourish Shake - Nourish & Flourish® is the meal replacement shake with a perfect balance of macronutrients, superfoods, and bioavailable vitamins. It’s the easiest way to give your body everything it needs, every single day.

Solutions For Health Super Immune Support - Super Immune Support is an herbal combination formulated for the support of a healthy immune system. This botanical formula has Garlic Extract, which has been used for centuries to promote overall wellness. We’ve also included Elderberry, Olive Leaf Extract and Oregano Oil to complete this comprehensive formula.

Pure Encapsulations Immune Defense with NAC - PureDefense w/NAC contains a combination of EpiCor®, N-acetyl- l-cysteine (NAC), vitamins, zinc and herbal extracts designed to promote overall immune defense and provide enhanced support for upper respiratory health.

Pure Encapsulations Zinc 15 - Offers broad physiological support, including immune function and emotional wellness.

 

08/04/2026

Ani Bajaj / Solutions 4 Health LLC information or services are not designed or intended to treat any specific disease or medical condition. No comment or recommendation should be construed as being a medical diagnosis or substitute for a medical professional.