In short: testing tells us what your symptoms cannot. We use functional, naturopathic and integrative lab work to look at digestion, food and environmental reactivity, toxic burden, nutrient status, hormones and metabolic health, then build a plan from what the results actually show. Testing is always chosen to answer a specific question about your health, never ordered as a routine bundle.
Standard bloodwork is built to find disease. It is very good at that, and it is where care should start. But plenty of people arrive at our Roswell clinic with normal labs and real symptoms, and that gap is where functional testing earns its place. Rather than asking only whether you have a diagnosable condition, these panels look at how well your systems are actually working, and where the strain is coming from.
Dr. Gail Ravello uses testing selectively. The point is never to collect data. It is to answer the question your history raises, so the naturopathic and integrative plan that follows is built on evidence instead of guesswork. Our functional medicine page covers the wider approach these panels sit inside, and how to read your results explains what the numbers on the report actually mean.
Food reactions are among the most common reasons people seek testing, and among the most misunderstood. Symptoms are rarely limited to digestion. Fatigue, headaches, joint aches, congestion, skin flares and brain fog all show up on the list.
We use food sensitivity testing the way the research supports using it, as a way to personalize an elimination and reintroduction trial rather than as a verdict handed to you on paper. That distinction matters, and it has been studied properly. A randomized, sham-controlled trial in Gut in 2004 found that patients with irritable bowel syndrome who removed foods identified by testing improved more than those given a sham diet removing the same number of foods, with the difference reaching 26 percent among those who stuck to the plan. A larger multicenter randomized trial published in Gastroenterology in 2025 reached the same conclusion, with significant improvement in abdominal pain compared with a sham diet.
What that means in practice: a panel gives us a starting shortlist. Your response to removing and then reintroducing those foods is what confirms whether they matter for you. Anyone who tells you a blood test alone settles the question is overselling it. Our post on food allergy versus food sensitivity sets out how the two differ and which test belongs to which.
Seasonal and indoor allergies drive a great deal of chronic congestion, sinus pressure, poor sleep and low-grade fatigue around north Fulton County. Testing can identify reactivity to tree, grass and weed pollens, dust mites, animal dander and indoor mold spores. Knowing which triggers are yours changes what is worth doing about your home, your schedule and your allergy care plan.
The gut is usually the first place we look, partly because so much of immune function and inflammation runs through it, and partly because it is one of the few systems where testing gives genuinely detailed answers. Comprehensive stool analysis can look at:
Beneficial species, opportunistic overgrowth and the overall diversity of your gut bacteria.
Pancreatic enzyme output, fat digestion and how well you are breaking food down in the first place.
Intestinal inflammation markers that help separate an irritated gut from a purely functional one.
Protozoa, worms and bacterial pathogens that standard screening frequently misses.
A common stomach bacterium linked to reflux, gastritis and ulcers. Stool antigen and breath testing detect active infection, which is what matters clinically.
Fungal overgrowth that can accompany bloating, sugar cravings and recurrent irritation.
Markers relating to the integrity of the gut lining, often relevant when food reactions keep multiplying.
Immune markers for celiac disease and gluten reactivity, worth ruling in or out before any long-term elimination.
Breath testing is also available where small intestinal bacterial overgrowth is suspected, since that pattern responds to a different approach than a colon-level imbalance. Results feed directly into your digestive health plan. Candida is worth a word of its own here, because it is genuinely common and heavily over-diagnosed; our post on what candida testing can and cannot tell you covers each method and its limits.
Toxic burden is the category patients ask about most and understand least. We test it because exposure is genuinely common, not because everyone turns out to be loaded.
Lead, mercury, arsenic, cadmium and other toxic elements, assessed against your actual exposure history. See heavy metals detoxification.
Urine mycotoxin panels used alongside a careful history of water damage, since the story of the building matters as much as the number on the report.
Solvents, plasticizers, pesticide residues and other common industrial compounds that accumulate through everyday exposure.
Full nutrient and toxic element profiles, which show mineral status and toxic exposure side by side rather than in isolation.
Where results and history point the same direction, we build a supported detoxification plan. Where they do not agree, we keep looking rather than treating a number.
Nutrient deficiency is quietly responsible for a great deal of fatigue, poor recovery, low mood and stalled weight loss. Serum levels alone can look reassuring while function tells a different story, so we combine approaches.
Vitamin D, B12, folate, iron studies, magnesium, zinc and other nutrients central to energy and repair.
Intracellular testing that reflects what your cells have actually been able to use, not only what is circulating.
Urinary metabolic markers relating to energy production, B-vitamin need, gut microbial byproducts and detox pathways.
Omega-3 status and amino acid balance, both of which affect inflammation, mood and recovery.
These results shape the nutrition side of your plan, including any work on nutrition and weight loss.
Fatigue, weight change, brain fog, poor sleep and mood shifts often trace back here, and a single TSH will not tell you enough. We look at the endocrine picture as a system.
Beyond TSH to free hormones, conversion and thyroid antibodies. See thyroid care.
Saliva or dried urine collected across the day, because the pattern matters more than any single value. See adrenal health.
Estrogen, progesterone, testosterone, DHEA and metabolites for both men and women. See hormone balancing.
Fasting insulin, HbA1c and glucose, which often reveal metabolic strain years before a diagnosis.
Particle-level lipid detail plus inflammatory and clotting markers for a fuller cardiovascular risk picture.
Antibody and inflammatory markers where an autoimmune process is suspected.
Tick-borne infections and co-infections, which are often overlooked in long-running unexplained illness.
Markers related to mood, focus and sleep, interpreted alongside nutrient and hormone findings.
Variants affecting methylation and nutrient handling, useful for tailoring supplement form and dose.
Specialized testing where copper handling or mineral regulation appears to be part of the picture.
Most testing is straightforward and much of it can be done at home. The sample type is chosen to fit the question, not the other way around.
Being straight about this is part of doing it well. Laboratory findings describe patterns, they do not by themselves explain how you feel, and no panel replaces a proper clinical evaluation. Some functional tests are well established and others are still developing, with reference ranges that vary between laboratories. That is why we interpret every result against your history, your symptoms and your other medical care rather than in isolation, and why we will tell you when a result is suggestive rather than conclusive.
Our testing is intended to complement the care you receive from your other providers, not to replace it. We work alongside your physician, and we will refer you when something needs conventional diagnosis or urgent attention. This page is educational and is not a substitute for professional medical advice.
Our clinic at 1130 Upper Hembree Rd serves patients across Roswell, Alpharetta, Milton, Johns Creek, Sandy Springs, Marietta, Woodstock, Cumming and the greater Atlanta area. If you have been told your labs are normal but you know something is off, testing is often the fastest way to find out what your history has been hinting at. New patients can review the new patient guide before booking.
To discuss which testing makes sense for your situation, call (770) 674-6311 or contact us online.
Educational resources from trusted medical organizations. This information does not replace personalized medical advice.
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