Insulin Resistance: This is often a primary concern in functional medicine due to its prevalence and impact on overall health, including the development of type 2 diabetes and metabolic syndrome. It's a fundamental issue that can lead to a cascade of other health problems.

Gut Dysbiosis: An imbalance in the gut microbiome can lead to a variety of symptoms and conditions, including digestive issues, autoimmune diseases, and even mental health disorders. It's a common underlying issue in many functional medicine cases.
Adrenal Fatigue: This condition, characterized by fatigue, insomnia, and other symptoms, is believed to result from prolonged stress on the adrenal glands, leading to hormonal imbalances. It's a likely diagnosis in patients with chronic stress and fatigue.
Thyroid Dysfunction: Hypothyroidism or hyperthyroidism can have widespread effects on the body, including metabolism, energy levels, and mood. It's a common diagnosis in functional medicine, often requiring a more nuanced approach than conventional medicine.

Celiac Disease: Although not as common, celiac disease is an autoimmune disorder that can cause severe health issues if not diagnosed and managed properly. It's crucial to consider this diagnosis due to its potential for severe complications if missed.
Heavy Metal Toxicity: Exposure to heavy metals like mercury, lead, or arsenic can have profound health effects, including neurological damage and increased risk of certain diseases. It's a critical diagnosis not to miss due to its potential for severe and long-lasting health consequences.
Autoimmune Disorders: Conditions like rheumatoid arthritis, lupus, or Hashimoto's thyroiditis can have significant impacts on quality of life and require early intervention. Missing these diagnoses can lead to prolonged suffering and increased risk of complications.

Mast Cell Activation Syndrome (MCAS): A condition characterized by excessive mast cell activity, leading to a wide range of symptoms, including allergic reactions, gastrointestinal issues, and neurological problems. It's a rare but important diagnosis to consider in patients with complex, multisystem symptoms.
Mitochondrial Dysfunction: Problems with the mitochondria, the energy-producing structures within cells, can lead to fatigue, neurological issues, and other systemic problems. It's a rare diagnosis that can be overlooked but is crucial for understanding certain complex health issues.
Porphyrias: A group of disorders that result from a buildup of porphyrins, which are important for hemoglobin production. These conditions can cause neurological symptoms, abdominal pain, and sensitivity to sunlight, among other issues. They are rare but can be devastating if not properly diagnosed and managed.