Barbell Medicine Podcast

Bonus Preview: Lead in Protein, Training Myths, and Cutting Weight

Oct 30, 2025
Dr. Jordan Feigenbaum tackles the surprising issue of lead in protein supplements and the need for batch testing. He critiques popular group classes for compromising training quality and stresses that excessive stretching is often counterproductive. In a bold move, he warns against aggressive weight cuts before competitions, suggesting safer strategies instead. The discussion also covers the benefits of isometric exercises for those in pain and highlights the importance of strength training over mobility work for optimal performance.
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INSIGHT

Lead Labels Don’t Equal Toxicity

  • Proposition 65 labeling is a right-to-know rule, not a scientific toxicity cutoff.
  • FDA and EU limits for lead are much higher than the Consumer Reports threshold.
ADVICE

Buy Batch-Tested Supplements

  • Choose supplements made in GMP facilities and batch-tested by third parties like NSF or Informed-Sport.
  • Prefer products with per-batch testing labels rather than untested cheaper powders.
INSIGHT

Group Classes Trade Load For Fun

  • Group classes boost adherence but often sacrifice training volume and load intensity.
  • Circuit pairing in classes commonly reduces force production and exercise adaptations.
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