About this episode

This episode explores the truth behind the supplement industry and challenges common assumptions about the effectiveness of various supplements.

Most of us assume supplements are helping us. After all… they're marketed as essential for filling nutrient gaps, supporting immunity, and optimizing health. But what if that assumption deserves a closer look? In this episode of the ReThink Health Podcast, I sit down with Robyn Openshaw (author, researcher, and founder of GreenSmoothieGirl) to pull back the curtain on the supplement industry. What she uncovered after years of deep research may completely change how you think about the pills in your cabinet. From synthetic vitamins to fish oil, collagen, and beyond, Robyn explains why not all supplements are created equal… and why many may not be delivering the benefits people expect. You'll learn: Why most supplements on the market are synthetic (and what that actually means) The surprising connection between the pharmaceutical and supplement industries Why isolated nutrients may not replicate the complexity of whole foods What's really behind common supplements like vitamin D, B12, and collagen Why many fish oil supplements may be oxidized or ineffective The difference between correlation and causation in nutrition research How soil depletion and modern agriculture may…

People in this episode

Host: Dr. Autumn Smith

Guest: Robyn Openshaw

Topics covered

• supplements
• nutrition
• health
• synthetic vitamins
• pharmaceutical industry
• whole foods
• nutrient deficiencies

Keywords

• supplements
• nutrition research
• synthetic vitamins
• fish oil
• collagen
• vitamin D
• B12
• nutrient deficiencies

Mentioned in this episode

Organizations: Green Smoothie Girl

Products: Paleovalley Omega-3 Complex

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• The Real Reason You Can't Lose Weight | It's Not What You Think (Dr. Hyman reveals) · May 12, 2026 · 41 min
• Can Eating Meat Actually Be Healthy? with Dr. Drew Pinsky · May 12, 2026 · 1h 1m
• The Anti-Inflammatory Amino Acid You May Be Deficient In · May 5, 2026 · 1h 40m

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