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Day: April 10, 2026

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Looking Beyond “Normal” Lab Result

One of the most common things we hear new patients tell us is, “My blood work was normal, but I still don’t feel like myself.”

They might be dealing with fatigue, brain fog, digestive issues, joint discomfort, or low energy. Yet when standard tests come back within the normal range, it can feel confusing and frustrating.

This is what makes functional testing different. We focus on understanding how the body is functioning before disease develops. Instead of waiting until a clear diagnosis appears, the goal is to look for early imbalances that may be placing stress on the body.

Sometimes these changes show up in lab markers long before a condition develops.

By looking a little deeper at those patterns, we can often identify opportunities to support the body earlier and help prevent larger issues down the road.

Looking for Early Patterns, Not Just Disease

Conventional lab ranges are designed to detect disease. In many cases, results are considered “normal” until they reach a level associated with a diagnosable condition.

Instead of only asking whether a marker falls within a normal range, we often ask:

  • Is this marker trending in a healthy direction?
  • Is it sitting in a range where the body tends to function best?
  • Could this pattern explain the symptoms the person is experiencing?

This approach can help reveal early signs of imbalance in areas like inflammation, metabolism, nutrient status, or hormone regulation. Addressing those patterns early may help support overall health before more serious issues develop.

Normal vs Optimal Lab Ranges

Standard lab reference ranges are typically based on large population averages. That population often includes individuals who may already have underlying health concerns.

We often look at optimal ranges, which reflect where markers tend to support the most stable physiology and long-term wellness. Someone may technically fall within the normal range but still experience symptoms if their results sit at the outer edges of that range. This doesn’t mean a disease is present. It simply means there may be an opportunity to support the body more proactively.

Looking at Inflammation in the Body

One of the key patterns functional medicine often evaluates is chronic low-grade inflammation. Inflammation is a normal part of the immune system. In the short term, it helps the body heal and defend itself against infection.

But when inflammation becomes persistent, even at low levels, it can influence many areas of health. Research has linked chronic inflammation with concerns such as metabolic imbalance, cardiovascular disease, fatigue, and mood changes.

Several blood markers can provide insight into inflammatory activity in the body.

C-Reactive Protein (hs-CRP)

High-sensitivity C-reactive protein (hs-CRP) is one of the most commonly used markers to assess systemic inflammation.

Standard reference range:
 0.0 – 3.0 mg/L

Optimal range:
0.0 – 1.0 mg/L

Higher levels may indicate low-grade inflammation related to factors such as metabolic health, stress, diet, or lifestyle patterns.

Erythrocyte Sedimentation Rate (ESR)

ESR measures how quickly red blood cells settle in a test tube. A faster rate can indicate inflammatory activity in the body.

Typical reference range:
Men: 0 – 15 mm/hr
Women: 0 – 20 mm/hr

Optimal range:
Men: 0 – 10 mm/hr
Women: 0 – 12 mm/hr

Elevated levels can sometimes reflect inflammatory processes or immune system activity.

Ferritin

Ferritin is commonly used to evaluate iron storage, but it also behaves as an inflammatory marker.

When inflammation is present, ferritin levels may increase as part of the body’s immune response.

Standard reference range:
Men: ~30 – 400 ng/mL
Women: ~15 – 150 ng/mL

Optimal range:
Approximately 50 – 100 ng/mL

Levels significantly above this range may sometimes indicate inflammatory activity rather than iron status alone.

Homocysteine

Homocysteine is an amino acid involved in methylation and cardiovascular health.

Elevated homocysteine levels may be influenced by nutrient status, metabolism, and inflammatory processes.

Typical reference range:
5 – 15 µmol/L

Optimal range:
6 – 8 µmol/L

Higher levels may sometimes suggest nutrient imbalances, metabolic stress, or inflammation.

Additional Markers Functional Medicine Often Looks At

In addition to direct inflammatory markers, metabolic markers can also signal early stress in the body. Changes in blood sugar regulation are closely connected to inflammation, hormone balance, and long-term metabolic health.

Two markers commonly evaluated are fasting insulin and HbA1c.

Fasting Insulin

Fasting insulin measures how much insulin the body produces to regulate blood sugar after an overnight fast.

Insulin is a hormone that helps move glucose from the bloodstream into cells for energy. When the body becomes less sensitive to insulin, the pancreas may produce more of it to compensate.

This can happen years before blood sugar levels become abnormal, which is why fasting insulin can be an important early marker.

Typical reference range:
 2 – 25 µIU/mL

Optimal range:
Approximately 2 – 6 µIU/mL

Higher levels may suggest insulin resistance, which has been linked to chronic inflammation, metabolic syndrome, and increased risk of cardiovascular disease. Identifying this pattern early can allow for lifestyle and nutrition changes that support healthier blood sugar regulation.

Hemoglobin A1c (HbA1c)

HbA1c reflects the average level of blood sugar over the previous two to three months. It measures the percentage of hemoglobin in red blood cells that has glucose attached to it.

Because it reflects longer-term patterns, HbA1c can provide helpful insight into how well the body is managing blood sugar over time.

Typical reference range:
Below 5.7%

Optimal range:
Approximately 4.8 – 5.3%

Even when HbA1c falls within the normal range, slightly elevated levels may indicate early shifts in blood sugar control.

Since blood sugar regulation is closely connected to inflammation, energy levels, and metabolic health, this marker can offer valuable context when evaluating overall wellness.

Why These Markers Matter

Individually, these markers offer useful information. But when looked at together, they can help reveal patterns that may not be obvious from a single test.

For example, slightly elevated inflammatory markers may suggest the body is experiencing ongoing stress from factors such as:

  • Poor sleep
  • Chronic stress
  • Gut health imbalances
  • Blood sugar instability
  • Nutrient deficiencies

Functional testing allows practitioners to connect these dots and develop strategies that address potential root contributors.

What Happens After Functional Testing?

Testing is just the starting point. Once patterns are identified, we typically build a plan focused on supporting the body’s systems. This might include:

  • Nutrition changes that help reduce inflammation
  • Improving sleep and stress resilience
  • Addressing gut health imbalances
  • Supporting nutrient levels with a targeted approach and high-grade nutraceuticals
  • Encouraging lifestyle habits that support metabolic health

The goal is to work with the body rather than simply reacting once symptoms become more severe.

A More Preventative Way to Look at Health

Health exists on a spectrum.

At one end of that spectrum is optimal wellness. At the other is diagnosable disease. Many people fall somewhere in the middle, experiencing symptoms even though their tests may still appear normal.

Functional testing helps identify where someone may be on that spectrum.

By recognizing patterns early, it becomes possible to support the body before small imbalances develop into larger health challenges. And for many people, that deeper look can be the missing piece in understanding why they haven’t been feeling their best.

References:

Calder, P. C., Ahluwalia, N., Brouns, F., Buetler, T., Clement, K., Cunningham, K., et al. (2017). Dietary factors and low-grade inflammation in relation to overweight and obesity. British Journal of Nutrition, 106(S3), S5–S78.

Libby, P. (2021). Inflammation in atherosclerosis. Nature, 592(7855), 524–534.

Pepys, M. B., & Hirschfield, G. M. (2003). C-reactive protein: A critical update. Journal of Clinical Investigation, 111(12), 1805–1812.

Stabler, S. P. (2013). Homocysteine metabolism and human disease. New England Journal of Medicine, 368, 2517–2528.

Furman, D., Campisi, J., Verdin, E., Carrera-Bastos, P., Targ, S., Franceschi, C., et al. (2019). Chronic inflammation in the etiology of disease across the life span. Nature Medicine, 25(12), 1822–1832.

Kell, D. B., & Pretorius, E. (2018). Serum ferritin is an important inflammatory disease marker. Metallomics, 10(9), 1180–1193.

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Common Causes of Hair Loss and What You Need to Know

You might notice more hair than usual in the shower, thinning around your temples, or your ponytail feeling smaller than it used to. Sometimes it seems to happen suddenly, while other times it shows up gradually over time.

A lot of people assume hair loss is purely genetic. And while genetics can definitely play a role, we often see other factors involved as well.

Things like hormone changes, thyroid function, iron levels, and nutrition can all influence how healthy your hair follicles are.

What you might not know? Hair loss is often a signal that the body might need support somewhere else.

Hair Growth Is Closely Connected to Overall Health

Hair follicles are actually very active parts of the body. They require a steady supply of nutrients, hormones, and oxygen to grow strong, healthy hair. 

When the body is under stress, dealing with nutrient deficiencies, or experiencing hormone shifts, the hair growth cycle can change. This is why people sometimes notice increased shedding after things like illness, major stress, pregnancy, or hormone changes.

When the body is trying to rebalance itself, hair follicles are often one of the first places we see changes.

Hormones and Hair Loss

Hormones play a major role in hair growth for both men and women.

In men, hair thinning is often linked to dihydrotestosterone (DHT), a hormone derived from testosterone. Over time, sensitivity to DHT can cause hair follicles to shrink, which leads to thinning along the hairline or crown.

In women, hormone changes can also influence hair growth. We often see hair thinning during times when hormones are shifting, such as:

• After pregnancy
• During perimenopause or menopause
• With conditions like PCOS
• During periods of high stress

These hormone shifts can push more hair follicles into the shedding phase of the hair cycle.

Thyroid Health and Hair Thinning

The thyroid plays an important role in regulating metabolism throughout the body, including the health of hair follicles. When thyroid hormones are out of balance, hair growth can slow and shedding may increase.

Both underactive thyroid (hypothyroidism) and overactive thyroid (hyperthyroidism) can contribute to hair thinning. Sometimes hair loss related to thyroid changes appears alongside other symptoms like:

• Fatigue
• Dry skin
• Brittle nails
• Feeling unusually cold
• Difficulty with energy

When these patterns show up together, it can be helpful to take a closer look at thyroid function.

Iron Levels and Hair Loss

Low iron is one of the most common contributors to hair thinning, especially in women. Hair follicles need oxygen and nutrients to grow properly, and iron helps carry oxygen through the bloodstream. When iron stores are low, hair follicles may shift into the shedding phase more quickly. This can happen for a number of reasons, including:

• Heavy menstrual cycles
• Pregnancy or postpartum changes
• Low dietary iron intake
• Digestive issues that affect absorption

Checking ferritin levels, which reflect iron stores in the body, can often provide helpful insight when hair shedding is happening.

Do GLP-1 Medications Affect Hair Loss?

Another question that has come up recently is whether GLP-1 medications can affect hair.

These medications, often prescribed for diabetes or weight management, have become much more common in recent years. As more people use them, some have noticed increased hair shedding.

Research suggests the medication itself may not directly cause hair loss. Instead, rapid weight loss can sometimes trigger a temporary shedding pattern called telogen effluvium.

This type of hair loss can also happen after illness, surgery, pregnancy, or periods of significant stress. Rapid weight loss can also affect things like:

• Protein intake
• Iron levels
• Nutrient intake
• Overall metabolic stress

All of these factors can influence the hair growth cycle.

Testing That Can Help Identify the Root Cause

When someone comes in concerned about hair loss, one of the most helpful steps is often looking a little deeper at what’s happening internally.

Some of the most common lab markers evaluated for hair loss include:

  • Iron and ferritin levels: Ferritin helps measure the body’s iron stores. Even when iron levels appear normal, low ferritin can sometimes contribute to hair thinning.
  • Thyroid markers: Testing often includes TSH, Free T3, and Free T4 to evaluate how well the thyroid is functioning.
  • Sex hormones: Hormone testing may include markers like testosterone, estrogen, progesterone, and DHEA to see whether hormonal shifts could be contributing to hair loss.
  • Vitamin levels: Nutrients like vitamin D, B12, and folate can influence hair follicle health.
  • Blood sugar and metabolic markers: Tests like fasting insulin and HbA1c can sometimes reveal metabolic stress that may indirectly affect hair growth.

Looking at these markers together often helps create a clearer picture of what might be contributing to hair thinning.

Nutrition and Hair Growth

Hair growth requires a steady supply of nutrients. When the body isn’t getting enough of certain vitamins or minerals, hair health can be affected.

Some of the most important nutrients for hair include:

  • Protein: Hair is largely made of keratin, a type of protein. Getting enough protein helps support hair strength and growth. Good sources include eggs, fish, poultry, legumes, and nuts.
  • Iron: Iron-rich foods like red meat, spinach, lentils, pumpkin seeds, and legumes support oxygen delivery to hair follicles.
  • Healthy fats: Omega-3 fats found in salmon, walnuts, and flaxseeds support scalp health and help balance inflammation.
  • B vitamins: These vitamins support energy production and hair follicle function. Leafy greens, eggs, whole grains, and legumes are good sources.

Supplements That May Help

When nutrient gaps are present, targeted supplements may help support hair growth. For many women, prenatal vitamins can be helpful because they often contain several nutrients important for hair health, including iron, folate, and B vitamins.

Other supplements that may be considered include:

• Iron (when levels are low)
 • Zinc
 • Biotin
 • Vitamin D
 • Omega-3 fatty acids

It’s usually best to look at lab results first so supplements can be tailored to what the body actually needs.

Looking at the Root Cause

Hair loss can feel discouraging, but it can also provide helpful clues about what may be happening in the body.

Instead of focusing only on the hair itself, functional medicine looks at the bigger picture. Hormone balance, thyroid health, nutrient levels, stress, and metabolism all influence the environment where hair follicles grow.

When those systems are supported, many people begin to see gradual improvements in hair growth over time.

If you’ve been noticing hair thinning or increased shedding, taking a closer look at what’s happening inside the body can often be an important first step.

References:

Almohanna, H. M., Ahmed, A. A., Tsatalis, J. P., & Tosti, A. (2019). The role of vitamins and minerals in hair loss: A review. Dermatology and Therapy, 9(1), 51–70.

Guo, E. L., & Katta, R. (2017). Diet and hair loss: Effects of nutrient deficiency and supplement use. Dermatology Practical & Conceptual, 7(1), 1–10.

Harrison, S., & Sinclair, R. (2003). Telogen effluvium. Clinical and Experimental Dermatology, 27(5), 389–395.

Messenger, A. G., & Sinclair, R. (2006). Follicular miniaturization in androgenetic alopecia: Pathophysiology and treatment. Journal of Investigative Dermatology Symposium Proceedings, 11(1), 14–17.

Rushton, D. H., Norris, M. J., Dover, R., & Busuttil, N. (2002). Causes of hair loss and the developments in hair rejuvenation. International Journal of Cosmetic Science, 24(1), 17–23.

Stuckey, B. G. A. (2008). The role of thyroid dysfunction in hair loss. Clinical Endocrinology, 68(3), 421–426.

Trost, L. B., Bergfeld, W. F., & Calogeras, E. (2006). The diagnosis and treatment of iron deficiency and its potential relationship to hair loss. Journal of the American Academy of Dermatology, 54(5), 824–844.

Wilding, J. P. H., Batterham, R. L., Calanna, S., Davies, M., Van Gaal, L. F., Lingvay, I., et al. (2021). Once-weekly semaglutide in adults with overweight or obesity. New England Journal of Medicine, 384(11), 989–1002.