The Dr. Gundry Podcast

Episode: The Supplements You’ve NEVER Heard of … - Dr. G's Quick Health Tip | EP 374.B
Date: October 23, 2025
Host: Dr. Stephen Gundry

Episode Overview

In this short, information-packed episode, Dr. Stephen Gundry introduces listeners to cutting-edge, lesser-known supplements that may profoundly benefit health and longevity. With his trademark blend of clinical experience and digestible science, Dr. Gundry focuses on two "under the radar" compounds—spermidine and molecular hydrogen—detailing their cellular mechanisms, sources, and what makes them potentially transformative additions to your wellness regimen.

Key Discussion Points & Insights

1. Spermidine: The Cellular Recycling Agent

• What is Spermidine?
  • A naturally occurring polyamine compound in the body, crucial for proper cellular function and survival.
  • Regulates cellular functions, especially the life/death cycles of cells.
• How Does It Work?
  • Facilitates autophagy (self-recycling of cells), rather than apoptosis (cell death by explosion), which leads to inflammation.
  • [03:00] Dr. Gundry: “Apoptosis is really bad for you... mitochondria... contain bacterial DNA. Your immune system views this as bacteria and produces inflammation.”
  • Autophagy is beneficial because it recycles cellular components without triggering inflammatory responses.
• Pathways Activated:
  • Inhibits mTOR pathway: Senses energy scarcity, encouraging non-essential cells to self-recycle.
    • “It’s kind of like pruning a tree for winter.” — [04:55]
  • Activates AMPK pathway: Enhances energy utilization and releases fatty acids from adipose tissue for fuel (similar to how exercise and GLP-1 drugs work).
    • [06:15] Dr. Gundry: “Spermidine is kind of exercise and fasting in a bottle.”
• Benefits:
  • Increases longevity by driving autophagy.
  • Improves fat metabolism.
  • Inhibits cell proliferation in favorable ways.
  • Improves gut barrier integrity and overall gut health—a key to long-term health and brain protection.
• Best Food Sources:
  • Traditional fermented sausages, chicken skin, chicken livers, sheep and goat cheese.
    • [09:13] Dr. Gundry: “Fun fact. Chicken skin is loaded with spermidine, as are chicken livers. So don't have a boneless, skinless chicken breast. Have the skin instead.”
    • Notably high in the diets of Andorra, a region with exceptional longevity.
• Supplements:
  • Dr. Gundry has incorporated spermidine in his supplement lines, notably “Gummy active amines.”

2. Molecular Hydrogen (H₂): The Cellular Protector

• What is Molecular Hydrogen?
  • Smallest molecule; can be taken via hydrogen water (dissolving hydrogen tablets in water).
• Cellular Mechanisms:
  • Activates NRF2 pathway: A master regulator of antioxidant and detoxification responses.
  • Regulates nitric oxide and hydrogen sulfide production (key signaling molecules, especially for cardiovascular and brain health).
    • [11:09] Dr. Gundry: “Hydrogen sulfide… we used to think [it's] a toxic gas, but... a little dab will do you; a bit… is very protective to the walls of our blood vessels, your brain, and your gut wall integrity.”
• Why Gut Health Matters:
  • Many beneficial gut bacteria produce hydrogen gas—vital for brain and gut function.
  • Modern lifestyles and antibiotics can diminish these bacteria.
• Research/Evidence:
  • Over 15,000 published papers indicate diverse roles in improving cellular stress response, recovery, and gut health.
  • Animal studies (rat swim tests) show improved performance and faster recovery with hydrogen water.
    • [13:03] Dr. Gundry: “Rats who were given hydrogen water performed better and recovered faster than rats who did not...”
• Practical Advice:
  • Most hydrogen water machines do not deliver sufficient hydrogen.
  • Hydrogen tablets (like “H2 Restore”) are a more reliable source.
  • Best sulfur sources for hydrogen sulfide: cruciferous vegetables (broccoli, cauliflower, bok choy, arugula, cabbages).
  • San Pellegrino mineral water is naturally high in sulfur (no sponsorship involved).
    • [12:21] Dr. Gundry: “You probably know I’m a big fan of San Pellegrino water. And no, they don't sponsor me... highest sulfur content of any mineral water.”

Memorable Quotes

• On the importance of autophagy:
  “Autophagy is a great thing. Apoptosis is a terrible thing. So the more you can produce autophagy, the better.”
  — Dr. Stephen Gundry, [03:30]

• On the dietary sources of spermidine:
  “Fun fact. Chicken skin is loaded with spermidine, as are chicken livers... Have the skin instead.”
  — Dr. Stephen Gundry, [09:13]

• On molecular hydrogen's emerging role:
  “Hydrogen has been shown in literally now 15,000 separate papers to be really important for multiple cellular functions.”
  — Dr. Stephen Gundry, [10:13]

• On hydrogen sulfide and sulfur:
  “A bit of hydrogen sulfide is very protective to the walls of our blood vessels. It’s very protective to your brain, and it’s also very protective to your gut wall integrity.”
  — Dr. Stephen Gundry, [11:09]

Notable Moments & Timestamps

• [02:07] Introduction of the episode's theme: “Supplements you’ve never heard of”
• [03:00–05:30] Deep dive into autophagy versus apoptosis and role of spermidine
• [06:00–07:00] mTOR and AMPK regulation, fasting and “exercise in a bottle” concept
• [08:13–09:35] Food sources of spermidine, Andorran longevity, gut health connection
• [10:10–13:20] Molecular hydrogen’s biological mechanisms, research evidence, and practical usage
• [12:21] Dr. Gundry’s personal favorite source of dietary sulfur (San Pellegrino water)

Conclusion & Actionable Takeaways

• Spermidine and molecular hydrogen are promising but underutilized supplements with evidence supporting their roles in cellular repair, longevity, and gut health.
• Dietary strategies (fermented meats, organ meats, cruciferous vegetables) and carefully chosen supplements (like hydrogen tablets) may help replicate some of the body’s own defenses, especially if your microbiome or metabolism could use support.
• Practical tip: Look for ways to increase these compounds naturally or with well-formulated supplements—especially if typical sources are missing from your diet.
• Overarching message: Supporting autophagy and boosting cellular protection with these lesser-known tools could be key to a longer, healthier life.

For resources, studies, and further reading, Dr. Gundry suggests signing up for his newsletter at drgundry.com.