What should I know about arten von stoffwechselanalysen guide?

The requested 'guide to types of metabolic analyses' is not present in the provided context. The available information covers DNA tests (ACTN3, FTO) and supplements, not a systematic overview of metabolic measurement methods. Generally, metabolic analyses include indirect calorimetry (resting and exercise metabolism), blood markers (glucose, lipids, hormones), breath tests (e.g., lactate), and genetic markers (e.g., FTO for obesity risk). Evidence strength varies: indirect calorimetry is clinically established (human-strong), while genetic predictions for individuals typically show only small effects (human-moderate to GWAS). Many commercial offerings combine methods without transparent validation. Without specific sources from your context, I advise caution: consult a physician or dietitian before interpreting tests. The overall evidence for this answer is rated as 'unclear'.