Should anyone be taking ashwagandha?

In this episode, Zach Guiser and John Tropeano kick things off with Turkey Bowl preparations.

This leads to the main topic: a deep dive into Ashwagandha. Is it a miracle supplement for stress and gains, or does it just turn you into an "emotionless zombie"? Zach breaks down the three proposed physiological mechanisms:

1. HPA Axis Modulation: Reducing cortisol by calming the hypothalamus
2. GABA Agonist: Mimicking the brain's primary inhibitory neurotransmitter to induce calm.
3. Antioxidant/Anti-Inflammatory: Neutralizing free radicals and blocking NF-κB to stop inflammation cycles .

They review four major studies covering stress, anxiety, sleep, and physical performance. The results are surprisingly strong—showing significant reductions in stress and anxiety, and even large effect sizes for strength and cardiorespiratory fitness . However, Zach introduces the Attia Categories (Proven, Promising, Fuzzy, Noise, Nonsense) and places Ashwagandha firmly in the Promising category due to a lack of long-term human data.

Finally, they bust common myths: it doesn't work instantly (it takes weeks), "natural" doesn't always mean safe (poison ivy is natural, too), and more is not better (stick to ~600mg) .

Everything in these newsletters, podcasts, social media, and on our website is for educational purposes only and should not be taken as medical advice for you or your athlete. Consult directly with a healthcare professional.

IN THIS EPISODE:

• 00:00 - Turkey Bowl Prep & The Greatest Cyclist You've Never Heard Of
• 06:38 - Main Topic: Should Anyone Be Taking Ashwagandha?
• 07:47 - The Public Narrative: Emotional Zombies & Testosterone Myths
• 11:25 - How Ashwagandha Works: The 3 Mechanisms (HPA Axis, GABA, Inflammation)
• 22:15 - Study #1: Effects on Stress (Big Reduction, High Heterogeneity)
• 35:48 - Study #2: Effects on Anxiety (Massive Effect Size)
• 42:26 - Study #3: Effects on Sleep (0.59 Effect Size)
• 44:03 - Study #4: Effects on Physical Performance (Strength, Power, VO2 Max)
• 50:00 - Summary: What Actually Matters (Stress, Anxiety, & Safety)
• 52:54 - Zach's Final Stance: Should You Take It?
• 57:04 - The Attia Categories: Proven, Promising, Fuzzy, Noise, Nonsense
• 1:00:38 - Mythbusters: Instant Results, "Natural = Safe," & Emotional Blunting