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Eating disorders are complex mental health conditions including anorexia nervosa, bulimia nervosa, and binge eating disorder that severely impact physical health. They are caused by a combination of psychological, genetic, and environmental factors that lead to restrictive eating, purging behaviors, and severe malnutrition. The Sex Hormone Binding Globulin (SHBG) test is the most important test for assessing hormonal complications from eating disorders.
Eating disorders are caused by a complex interaction of genetic, biological, psychological, and sociocultural factors. Research shows that brain chemistry imbalances involving serotonin and dopamine, combined with genetic predisposition, play significant roles in development. Additionally, psychological factors like perfectionism, low self-esteem, trauma, and societal pressure about body image and weight contribute to these conditions. Family history of eating disorders or mental health conditions, along with dieting culture and social media influence, can trigger the onset of anorexia nervosa, bulimia nervosa, or binge eating disorder.
The Sex Hormone Binding Globulin (SHBG) test is the most important blood test for eating disorders because it detects how malnutrition affects your hormonal balance and reproductive health. Both anorexia nervosa and bulimia are associated with elevated SHBG levels, which indicates the body is responding to nutritional deficiencies and severe weight loss. This test helps your healthcare provider monitor the physical complications of eating disorders and track how treatment is improving your hormonal function. While no blood test can diagnose an eating disorder itself, SHBG testing is essential for assessing the medical severity and guiding treatment plans that address both psychological and physical health needs.
You should get tested if you or a loved one exhibits restrictive eating patterns, frequent purging behaviors, excessive exercise despite fatigue, or noticeable weight changes. Additionally, consider testing if you experience missed menstrual periods, dizziness or fainting, extreme fatigue, hair loss, or obsessive thoughts about food, weight, and body image. Blood testing is particularly important when someone is in treatment for an eating disorder to monitor nutritional status and organ function, or when physical symptoms suggest that malnutrition is affecting hormone levels and overall health.
What this means
Your testosterone levels are slightly below the optimal range. While this is not necessarily cause for concern, it may contribute to occasional fatigue, reduced motivation, or lower muscle mass over time.
Recommended actions
Increase resistance or strength training
Prioritize 7–8 hours of quality sleep per night, try to reduce stress
Include more zinc- and magnesium-rich foods (like shellfish, beef, pumpkin seeds, spinach)
Consider retesting in 3–6 months
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