wie viel protein pro tag muskelaufbau — when to see a doctor?

The recommended protein intake for muscle building is 1.6–2.2 g per kg of body weight daily, based on meta-analyses (e.g., Morton et al., 2018). Higher doses generally provide no additional benefit. You should see a doctor if you experience lack of progress despite adequate protein, unexplained fatigue, weight loss, or kidney issues – or if you have pre-existing conditions like kidney disease, gout, or liver problems, as high protein can be risky. Also consult a doctor before starting supplements. Evidence is moderate (human-moderate) because individual factors like training intensity, age, and health status vary widely.