#439: Reclaiming Metabolism: The SECRET Molecule Transforming Women's Health (Belly Fat, Brain Power & Beyond) With Siobhan Mitchell PhD
Today, I’m joined by the insightful Siobhan Mitchell PhD, a leading expert on women’s health, mitochondria, and metabolic resilience. In our conversation, Siobhan reveals why so many women in their 30s and 40s feel like their metabolism is suddenly “broken,” and unpacks the real science behind what’s happening beneath the surface—especially as our hormones begin to shift.
We dive into the misunderstood world of estrogen, exploring its profound impact far beyond reproduction—from shaping the way our mitochondria function, to influencing brain health, bone strength, and even our body’s inflammatory responses. Siobhan shares emerging research on S-equol, a powerful phytoestrogen derived from soy, and explains how it may help restore metabolic balance, support cognitive health, and tackle that stubborn midlife belly fat—without the risks many associate with hormones or soy.
If you’ve ever wondered why your go-to wellness strategies aren’t working like they used to, or you’re looking for innovative, root-cause approaches to stay vibrant through your 40s and beyond, this episode is packed with practical tips and fresh science to empower you on your longevity journey.
Visit mitoq.com/nathalieniddam and use code NAT10 - 10% off!
Learn more from Siobhan Mitchell below:
Website: http://www.mitoq.com/nathalieniddam
What We Discuss:
Introduction and host welcome ... 00:00:00
Introducing Speaker B and focus on women’s health ... 00:04:30
Growing interest in women’s health and clinical gaps ... 00:05:12
Body composition and metabolic changes in perimenopause ... 00:06:01
Hormonal shifts—not a broken metabolism ... 00:09:21
Addressing the root cause versus band-aids like GLP-1 ... 00:11:10
What’s happening beneath the surface in early perimenopause ... 00:12:40
Role of estrogen in appetite, glucose, and fat storage ... 00:13:12
Visceral fat, inflammation, and accelerated aging ... 00:15:02
Estrogen’s connection to mitochondrial function ... 00:16:15
Brain, muscle, and cognitive declines with estrogen loss ... 00:16:44
Environmental and mitochondrial factors in PCOS ... 00:21:09
Shift to belly fat and why fat storage changes ... 00:22:58
Mitochondria, immune system, and autoimmunity in women ... 00:29:16
Phytoestrogens, soy, and S-equol as hormone alternatives ... 00:32:37
S-equol’s benefits: metabolic, bone, and brain health ... 00:35:50
Soy fears, GMOs, and the purity of S-equol ... 00:46:25
Microbiome, Bifidobacterium breve, and estrogen recycling ... 00:49:18
GLP-1s versus supporting the root cause ... 00:53:01
Optimizing estrogen signaling for health span and menopause timing ... 00:55:20
When to use S-equol: timing and benefits ... 00:55:54
Reversing visceral fat and lifestyle factors ... 01:03:28
Our Amazing Sponsors:
Manukora Honey - A simple upgrade to your daily routine, this Manuka honey delivers antioxidants, prebiotics, and naturally occurring MGO that you won’t get from regular sweeteners; head to http://manukora.com/natniddam to save up to 31% plus $25 in free gifts with the Starter Kit.
Mitopure Gummies by Timeline - These clinically researched gummies support mitophagy to help renew your mitochondria and boost cellular energy, giving you a stronger biological foundation for resilience—visit http://timeline.com/nat20 to get 20% off.
Daily Gut Detox by Just Thrive Health – A gentle, science-backed detox powered by clinically proven immunoglobulins that bind and remove toxins while supporting your gut, immune system, and digestion—without harsh flushing or discomfort. Visit JustThriveHealth.com/NAT20 and use code NAT20 for 20% off your order, risk-free.
More from Nat:
For Transparency:
Some episodes of the Longevity With Nathalie Niddam podcast are supported by partners whose products or services may be discussed during the show. The host may receive compensation or earn a minor commission if you purchase through affiliate links at no extra cost to you. All opinions shared are those of the host and guests, based on personal experience and research, and do not necessarily represent the views of any sponsor. Sponsorships do not imply medical endorsement or approval by any healthcare provider featured on this podcast.