Movement Logic: Strong Opinions, Loosely Held

139: AlgaeCal's Calcium Claims: Science or Salesmanship? Video

Movement Logic: Strong Opinions, Loosely Held

Show Notes

In this episode, Sarah Court and Laurel Beversdorf investigate the bone supplement company AlgaeCal and ask whether its marketing claims are supported by good evidence. They unpack the company's promotion of algae-derived calcium, its use of strontium supplements to claim increases in bone density, and why improvements on a DEXA scan don't necessarily mean stronger bones. Along the way, they explain how appeals to nature, authority, and fear are used to sell expensive supplements to women worried about osteoporosis.

The conversation also examines the growing "doctor-to-brand pipeline," using Dr. Vonda Wright as a case study in how medical authority can become intertwined with supplement marketing. Sarah and Laurel discuss why they declined an invitation to collaborate with AlgaeCal, why exercise remains the cornerstone of bone health, and how consumers can recognize misleading health claims before spending hundreds of dollars on products that may not deliver meaningful benefits.

FREE [https://mailchi.mp/d4c544ab3a5d/minicourse] Barbell Mini Course when you get on our mailing list

FOLLOW [https://instagram.com/themovementlogic] Movement Logic on Instagram

WATCH [https://www.youtube.com/@TheMovementLogic] Movement Logic on YouTube

LEARN MORE [https://themovementlogic.com/] on the Movement Logic website

Foldable Home Barbell Rack [https://verse.fit/movement-logic] by Verse, coupon code MovementLogic10%OFF at checkout

RESOURCES

92: Make Dr. Loren Fishman Make Sense [https://podcasts.apple.com/us/podcast/movement-logic-strong-opinions-loosely-held/id1614469934?i=1000698848361]

91: LIFTMOR, Not Less: An Interview with Belinda Beck [https://podcasts.apple.com/us/podcast/movement-logic-strong-opinions-loosely-held/id1614469934?i=1000696118548]

93: Should You Avoid Spinal Flexion with Osteoporosis? [https://podcasts.apple.com/us/podcast/movement-logic-strong-opinions-loosely-held/id1614469934?i=1000700877251]

113: Debunking Menopause Grifters: Mary Claire Haver and Vonda Wright [https://podcasts.apple.com/us/podcast/movement-logic-strong-opinions-loosely-held/id1614469934?i=1000731912781]

Doctor vs Brand Instagram Post [https://www.instagram.com/p/DS5cUmlEpdh/?img_index=1]

More from Movement Logic: Strong Opinions, Loosely Held

Oct 14, 2026

In this episode, we talk with Dr. Kemi Doll, a double board-certified OB-GYN and gynecologic oncologist, about endometriosis, fibroids, uterine cancer, PMOS, and hormonal birth control. We examine how wellness influencers exploit real experiences of medical dismissal to promote fear, undermine trust in established treatments, and sell alternatives.

Sep 16, 2026

SIGN UP [https://themovementlogic.com/bone-density-course-lift-for-longevity/] Lift for Longevity. Enrollment closes Sunday, September 20th. Classes begin September 28th.

Sep 2, 2026

In this episode, we look back at how our thinking about exercise has changed over the years, from our beginnings in yoga and physical therapy to strength training, bone density, power, fall prevention, and longevity. We talk about the ideas we stopped believing, the evidence that changed our minds, why "lift heavy shit" was an important corrective but ultimately an incomplete message, and how all of this has shaped the newest version of Lift for Longevity.

Aug 19, 2026

In this episode, we talk with bone health researcher Dr. Lora Giangregorio about what the evidence really says about resistance training, impact exercise, menopause, fracture prevention, balance, and falls. We also get into claims from OsteoStrong, why not all published research deserves equal weight, and why confident claims about the "best" way to build bone often outrun the evidence.

Aug 5, 2026

In part two of their deep dive into Louisa Nicola's claims about Alzheimer's prevention, Sarah and Laurel continue examining the scientific evidence behind some of her most widely shared social media posts, podcast appearances, and paid programs. Building on the foundation laid in part one, they fact-check claims about menopause, hormone therapy, Zone 5 training, heavy resistance training, creatine, and other interventions that Nicola presents as essential for protecting the brain. Throughout the episode, they compare her messaging with the available research, including randomized controlled trials, systematic reviews, and major clinical guidelines, highlighting where mechanistic theories are presented as established clinical facts and where evidence is overstated or misrepresented.

See all episodes →