The Active Site
by William Wallace, Ph.D.
Latest episode
The Nicotine–Parkinson’s Paradox
The Nicotine–Parkinson’s Paradox
About this podcast
The Active Site is an investigative science show hosted by Dr. William Wallace, examining the claims shaping health, medicine, nutrition, and human biology. Through scientific history, landmark studies, hidden contradictions, competing interpretations, and unresolved questions, each episode asks not only whether a belief is true—but how we came to believe it in the first place.
Episodes
The newest 20 of 85 episodes
- The Nicotine–Parkinson’s Paradox · 14 minNicotine is usually discussed as an addictive drug. But in 1959, researchers noticed something unexpected: people who smoked appeared less likely to develop Parkinson’s disease…
- Are Our Brains Really Filling With Microplastics? · 14 minMicroplastics have been detected in human brain tissue, and in 2025 one study produced a number that spread around the world: roughly a spoonful of plastic in the brain. But the…
- BPC-157: The Peptide That Seems to Heal Everything · 18 minBPC-157 is now used as a recovery peptide for tendon injuries, muscle strains, and stubborn joint problems. Some people report remarkable results, while others feel nothing. But…
- Will Lithium Really Save Your Brain? · 19 minThere is an element sitting in your brain right now, and nobody has established how much you are supposed to have. It may shape how you think, how you act, and whether your mind…
- A New Study Just Linked Creatine To Cancer · 11 minCreatine is one of the most-studied supplements in the world, taken by millions of people who have been told for years it is about as safe as anything on the shelf. Then, within…
- Do Aging Clocks Actually Work? · 16 minThere are tests now that claim to measure how old you really are. Not the number on your birth certificate, but your biological age, the idea being that two people born on the…
- What A Tattoo Actually Does Inside Your Body · 27 minFor decades the reassuring story about tattoos was that the ink stays put: a permanent mark, sealed in the skin, chemically done with your body. It isn't. Pigment migrates out of…
- Do You Need to Take Vitamin D with Magnesium & K2? · 9 minFor most of a decade, vitamin D came with a warning: take it on its own, and the calcium it raises ends up in your arteries instead of your bones. The fix, supposedly, is vitamin…
- Apigenin for Sleep and NAD+: Does It Hold Up? · 13 minFor most of the last century, apigenin was a footnote — a yellow pigment in chamomile and parsley, studied mostly by people cataloguing the antioxidants in plants. In the last…
- The Truth About Brain Magnesium · 13 minFor decades, magnesium sat in the supplement aisle as a mineral for muscle cramps, sleep, and general nutrition. Around 2010, that changed. A branded form called magnesium…
- Were We Wrong About Fish Oil and the Brain? · 14 minFor thirty years, the supplement aisle has sold fish oil as one of the simplest decisions you can make for your brain. In 2026, two research teams on opposite sides of the world…
- The New Dietary Guidelines Controversy — Explained · 13 minPREFACE: This is an explanation of the debate the guidelines have stimulated. It references the data used to rationalize the guidelines and the data used to oppose them. There is…
- Fish Oil, Oxidation, and the Truth About “Rancidity” · 9 minOmega-3 supplements are at the center of a controversy regarding their oxidation levels and potential harm. This presentation addresses the gap between claims of harm and the…
- A Nutrient Mixture That Tunes Brain Signaling · 9 min · Episode 76Nutrients are usually studied in isolation, yet synapses don’t operate that way. This episode examines research showing that coordinated nutritional inputs can reshape synaptic…
- How One Amino Acid Touches Two Aging Pathways · 10 minL-arginine is usually treated as a simple nitric-oxide precursor, a molecule with a narrow vascular role. But across multiple lines of research, it keeps appearing in places it…
- Two Missing Nutrients, Big Brain Consequences · 11 min · Episode 74Parkinson’s is often framed as a brain-first disorder, but some of its earliest changes unfold in the gut. This episode unpacks a global metagenomic analysis showing that two…
- The Nutrient Your Stress System Overuses · 10 min · Episode 73A new brain-imaging meta-analysis has uncovered the first consistent biochemical signature across multiple anxiety disorders (a shift in a single molecule that moves in the…
- Magnesium: The ‘Best’ Form Isn’t What You Think Part 2 · 10 min · Episode 72Magnesium salts are often marketed as if they target specific tissues - i.e., “threonate for the brain,” “glycinate for calm,” “taurate for the heart.” Part 2 breaks down what…
- Magnesium: The ‘Best’ Form Isn’t What You Think Part 1. · 9 min · Episode 71Magnesium supplements are marketed like different compounds with different biological targets - i.e., “for sleep,” “for the brain,” “for stress,” “for energy.” But the foundation…
- Common Longevity Medication… Performance Killer? · 8 minA medication used by millions (including off-label usage for “longevity” purposes) may alter the fundamental pathways responsible for exercise adaptation. This episode reviews…
