A Functional Medicine Approach to Blood, Guts and Hormones

One of the most important lessons in functional medicine, for patients and clinicians alike, is to follow a logical therapeutic ladder rather than chasing the latest bright, shiny test. An old parable about blindfolded men and an elephant captures the idea well: each man touches a different part – the tail feels like a rope, the leg like a tree, the trunk like a snake – and none can perceive the whole animal. Understanding how the body functions requires looking at the complete picture, and that begins with blood, guts and hormones, examined in the right order.

Starting with Your Story

Taking a thorough history is a cornerstone of good clinical practice, yet it is often rushed. No one understands your body and how you feel better than you do, so a clinician’s job is to listen carefully to your story. Combined with clinical experience, that narrative helps form a logical picture of what is happening and what to do next.

Part of a proper intake is building a health timeline from preconception to the present. This helps identify the antecedents, triggers and mediators of illness – the factors that predispose, provoke and contribute to dysfunction – so that cause-and-effect relationships which might otherwise go unnoticed become clear. It is also why old lab results are valuable rather than dismissed. Think of it like forecasting weather: predicting next month from today’s conditions alone is unreliable, but twenty years of data makes the forecast far more accurate. Your biochemical history works the same way.

Blood: Functional Blood Chemistry Analysis

After a thorough history, the next step is a functional blood chemistry analysis. Standard blood chemistry testing is tried, true and built on solid scientific footing, with strong accuracy, sensitivity and specificity. While functional medicine offers many additional tests – food sensitivity, organic acid, genetic, vitamin and mineral, heavy metal, microbiome and hormone testing – these generally aren’t the right place to start.

Food sensitivity testing is a good example. Identifying sensitivities matters, but the test depends entirely on immune function, so a poorly functioning immune system, digestive inflammation or low-grade infection can produce apparent sensitivities that are really symptoms of another problem. Once white blood cell counts are in a healthy range and there are no signs of gut infection or inflammation, such testing becomes far more meaningful. That’s why it makes sense to build from the foundations – history and blood chemistry – and move up the ladder only as needed.

It’s also important to distinguish routine from comprehensive blood chemistry. Many people are told their routine bloodwork is “all normal,” but routine panels look at only one part of the picture, and standard reference ranges mostly confirm you aren’t in immediate danger – not that you are thriving. A routine panel typically includes:

• CBC (complete blood count)
• Metabolic panel (electrolytes, minerals, proteins, enzymes, blood sugar)
• Standard lipid panel
• TSH
• Sometimes vitamin D, A1c, iron and basic inflammation markers

Functional blood chemistry is about how the data is analyzed and interpreted. A more comprehensive panel, paired with that analysis, gives a much clearer sense of which body systems need support. A comprehensive panel might include:

• CBC and comprehensive metabolic panel
• Standard lipid panel plus lipoprotein fractionation (LDL-P, ApoA, ApoB, Ox-LDL)
• Complete thyroid panel (TSH, total and free T4 and T3, reverse T3, thyroid antibodies)
• Vitamin testing (A, C, D, B1, B6, B12, folate)
• Mineral testing (magnesium, phosphorus, zinc, copper)
• Complete iron panel (iron, ferritin, TIBC)
• Inflammation markers (hs-CRP, ESR, uric acid, homocysteine)
• Immune reactivity markers (immunoglobulins, complement)
• Glucose regulation markers (A1c, insulin, c-peptide)

With the right testing and interpretation, a functional blood chemistry analysis can assess blood sugar regulation, cardiovascular function, immune function, digestion, liver and gallbladder (detoxification) function, adrenal and stress function, thyroid and metabolism, red blood cell function, kidney function, and markers of inflammation, oxidative stress and toxicity. Blood delivers oxygen and nutrients, carries away waste, fights infection and transports hormones – making it the first objective diagnostic step in optimizing health.

Guts: Comprehensive Stool Testing

If you’ve addressed your blood chemistry and still have symptoms, the digestive system is the next rung on the ladder. Food and nutrition are major pillars of health, but eating well is only step one – it doesn’t guarantee you’re fully digesting, absorbing and assimilating those nutrients. That’s where stool and microbiome testing become valuable.

Comprehensive stool testing differs from a standard stool culture, colonoscopy or endoscopy. It can provide detailed information including:

• Beneficial bacteria and overall bacterial balance
• Gut pathogens, including potentially harmful bacteria, yeasts and parasites
• Markers of digestion, absorption, immune function, inflammation and short-chain fatty acids
• Potential signs of inflammatory bowel disease or other more serious gut conditions

Not all stool tests are equally reliable, so it’s worth choosing a reputable lab and following prep instructions carefully. You may particularly benefit from this testing if you experience digestive symptoms such as reflux, gas, bloating, abdominal pain, constipation, diarrhea, IBS or IBD. In clinical practice, many issues not typically thought of as digestive can also be connected, including elevated cholesterol, food intolerances, skin problems like rashes or acne, mood disturbances, brain fog and fatigue, joint pain, and chronic sinus issues or allergies.

The logic is simple: food provides the vitamins, minerals, amino acids and water that drive billions of biochemical reactions every second. If you can’t break food down and absorb it, cells become dysfunctional, which cascades into dysfunctional tissues, organs and organ systems over time. This is why the digestive system is so intimately connected to the brain, skin, immune, cardiovascular, endocrine and musculoskeletal systems – and why it is the logical next step after blood chemistry.

Hormones: Complex and Often Oversimplified

Hormones play a major role in signaling imbalance throughout the body, but they rarely go out of balance for no reason. In a healthy person, hormones are well regulated, so when they drift, the imbalance is usually a sign of an underlying issue rather than the root problem itself.

That’s why blood and gut testing come first. There are so many moving parts to how hormones are produced, used and metabolized that simply topping them off with hormone replacement often misses the bigger picture. Thyroid regulation, for instance, depends on the body’s nutritional state and the availability of nutrients like selenium, iodine, iron, magnesium, zinc and vitamins A, D, E and C. The intake, digestion and absorption of proteins, carbohydrates and fats directly influence sex hormones such as estrogen, progesterone and testosterone. Cholesterol is even a vital precursor to both sex and stress hormones, so low cholesterol or poor fat processing (such as from gallbladder dysfunction) can produce hormone imbalances that are really symptoms of something else.

Interestingly, the gut microbiota itself behaves like an endocrine organ, producing many compounds that enter the bloodstream and act elsewhere in the body. So before testing and treating hormones, it makes sense to get blood chemistry and digestion in order first.

If you do measure hormones, remember they fluctuate considerably throughout the day, which limits the accuracy of a single blood draw. A woman might be told she has “low estradiol” at 8 a.m. and, two hours later, show much higher levels. Because production constantly ebbs and flows, a single measurement only captures one moment rather than the overall pattern. A combination of blood, saliva and urinary testing – where saliva and urine reflect totals produced across the day – gives a far better picture. Many people are treated for “hormone imbalance” on the basis of just one or two snapshots. Optimizing hormones is genuinely important, but it is best done after addressing blood and gut health first.

Functional Medicine at Family Health Chiropractic

When you’re struggling with pain and fatigue, it can be hard to know how or why you lost your spark – and frustrating to get it back alone. Rather than only treating symptoms, our integrative and functional medicine approach aims to look deeper, using the best diagnostic tools to identify and correct the imbalances at the root of illness.

If you’ve been told your labs look normal but you still don’t feel like yourself, we’re here to help. We recognize that no two people are alike, and we work to personalize a functional medicine approach across a wide range of ages and health conditions. If you’re interested in our functional medicine services, contact our office to schedule a consultation or first visit.