warum nehme ich nicht ab obwohl ich im kaloriendefizit bin — which blood markers matter?

The question of why you aren't losing weight despite a calorie deficit is common. While a deficit is necessary, metabolic adaptation, hormonal imbalances, and inflammation can hinder progress. Key blood markers to consider include: TSH, fT3, fT4 (thyroid function – hypothyroidism lowers metabolic rate), fasting insulin and HOMA-IR (insulin resistance promotes fat storage), HbA1c and fasting glucose (impaired glucose metabolism), cortisol (chronic stress can block fat loss), and CRP (systemic inflammation often linked to obesity). Vitamin D, ferritin, and a complete blood count may also be relevant. Evidence for these markers is moderate to mechanistic – no single 'weight loss gene' has strong clinical validity. Genetic tests (e.g., FTO) show only small effect sizes. A calorie deficit remains foundational, but if weight loss stalls, a medical check of hormonal and inflammatory status is advisable. MyBody-X offers such blood markers, but without guarantees. Be cautious of overblown claims: no test replaces personalized dietetic or medical advice.