In this episode, we’re diving deep into ultra-processed foods — and why cravings in your 30s, 40s, and 50s are not a character flaw.

If you’ve ever:

Felt compulsive around certain foods

Wondered why you “used to have more willpower”

Eaten for stress relief and felt ashamed afterward

Asked yourself why your partner can stop but you can’t

This episode is for you.

There are three major biologic reasons why cravings intensify during this season of life:

1️⃣ Engineered hyper-palatable foods

2️⃣ Chronic stress physiology

3️⃣ Perimenopause & progesterone decline

This isn’t about willpower.

Citation:

Episode 2 – Mechanism-Anchored Evidence Map: Ultra-Processed Foods, Reward Signaling, Stress, and Hormonal Vulnerability

Ultra-Processed Food Engineering – Salt, sugar, fat, and texture are manipulated to maximize reward signaling and overconsumption. (Fazzino et al., 2019; Gearhardt et al., 2011; Hall et al., 2019)

Dopamine and Reward Tagging – Dopamine marks important stimuli, reinforcing repeated behavior and “wanting” rather than pleasure. (Schultz, 2016; Berridge & Robinson, 1998)

High-Glycemic Carbohydrates – Increase tryptophan availability and serotonin synthesis, influencing mood and short-term relief. (Fernstrom & Wurtman, 1972; Wurtman & Wurtman, 1989)

Chronic Stress – Alters reward circuitry, increasing vulnerability to compulsive behaviors. (Piazza & Le Moal, 1998; Sinha, 2008)

Progesterone, Allopregnanolone, and GABA – Hormonal neurosteroids modulate GABAergic inhibition, stress buffering, and reward sensitivity. (Paul & Purdy, 1992; Reddy, 2010; Purdy et al., 1990)

Sleep and Appetite Regulation – Hormonal and neurosteroid pathways influence sleep; sleep disruption increases hunger and cravings. (Tasali et al., 2004; Purdy et al., 1990)

Summary: These mechanisms explain why hyper-stimulating foods are particularly compelling during chronic stress and hormonal transitions, showing cravings are biologically reinforced rather than a matter of willpower.

Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start.

👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it.

📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604

📲 Follow Dr. McCarthy:

Instagram: @drbrendanmccarthy

TikTok: @drbrendanmccarthy

Website: www.protealife.com

💬 Got a question or topic for a future episode? Let us know in the comments!