Your Diet Sucks

Should you count calories? A century ago, a Los Angeles doctor named Lulu Hunt Peters sold two million copies of a book that taught American women to count calories as a patriotic duty during WWI. She invented the 100-calorie snack pack. She set the 1,200-calorie floor that still haunts diet apps in 2026. The framework she popularized is still running your relationship with food.
This week, Zoë and Kylee dig into the question every active person has wondered about: should you be counting calories? They trace how a unit of heat invented to measure factory worker rations became the dominant logic of American eating. Where the 2,000-calorie label on every food package actually came from (it isn't science, it's a 1990 design choice). Why calorie counting is legally allowed to be 20 percent wrong before it ever reaches your plate. And why a framework with this many cracks has held on for a hundred years.
Along the way: what calorie counting did to the American food supply during the low-fat era, what the Biggest Loser metabolic adaptation research actually showed, why even registered dietitians can't accurately track their own intake, what set point theory says about why restriction backfires, and whether calorie tracking apps are tools, traps, or both. For athletes, the questions that actually matter for performance, and what the research says about who calorie counting helps and who it harms.
Plus: the early feminist origins of dieting (yes, really), why your microbiome is doing math your app can't see, and why this number keeps its grip on us even when the science says it shouldn't.
Listen for the full story.
This episode is brought to you by:
rabbit — Built by runners, for runners. Shop the women's collection at runinrabbit.com/collections/womens-new. Use code YDSMAY10 for 10% off.
Tailwind Nutrition — Real fuel that actually works for endurance athletes. Shop at tailwindnutrition.com and use code YOURDIET20 for 20% off.
Osmia — Clean, evidence-based skincare from a real doctor (and one of the few wellness brands we actually trust). Shop at osmiaskincare.com and use code YDS20 for 20% off.
Microcosm Coaching — Endurance coaching that meets you where you are. Book a free consultation call at microcosm-coaching.com.
Want more? Join us on Patreon at patreon.com/YourDietSucks for weekly nutrition Q&As with Kylee, bonus deep dives, and community discussions on the topics that are too niche or too spicy for the main feed.
Grab merch at teepublic.com/user/your-diet-sucks.
Resources, citations, and studies discussed in this episode are available at yourdietsuckspodcast.com.

This week, Zoë mailed a chunk of her hair to a stranger in Florida. For science. For journalism. For your benefit, really. The $60 hair sample test came back flagging her as "highly reactive" to 210 foods, including emu, ostrich egg, hot dog, and ground horse meat. Reader, she has not eaten ground horse meat in over a decade.
The food sensitivity industry is a multi-billion-dollar grift built on real symptoms and fake frameworks. We trace it from 1906, when allergy was first defined as a real clinical thing, through the 1950s clinical ecology movement, through cytotoxic testing, IgG panels, electrodermal screening, and bio-resonance, and finally to the at-home hair test in your DMs. It's the same idea in different packaging every decade. Like a body-snatcher, but for grift. (We use a lot of John Carpenter references in this one.)
Then Kylee walks through what the science actually says: the difference between IgE allergies, IgG sensitivities, and intolerances. What real diagnostic testing looks like (skin prick tests, blood panels, hydrogen breath tests, structured elimination diets with a professional). Why hair testing, IgG panels, and bio-resonance devices have no validated diagnostic mechanism. And why these tests disproportionately target women, who are statistically more likely to feel dismissed by their doctors and more likely to seek answers in the wellness market.
We also get into why endurance athletes are uniquely vulnerable to this stuff. When your gut acts up during training, the wellness industry hands you a list of 210 foods to eliminate. Your sports dietitian hands you a fueling plan. Guess which one tends to lead to a stress fracture.
The bottom line: your symptoms deserve a real answer. Don't let a hair test substitute for actual care.
This episode is supported by:
rabbit — Use code YOURDIETSUCKS10 for 10% off at runinrabbit.com Their trail line is genuinely the only running gear we actively look forward to wearing.
Tailwind Nutrition — Use code YOURDIET20 for 20% off at tailwindnutrition.com. Endurance fuel that doesn't taste like a chemistry set. Try the Mandarin Orange or the Daily Hydration Strawberry Lemonade.
Osmia Skincare — Use code YDS20 for 20% off at osmiaskincare.com. Clean, science-forward skincare from a real-deal physician-founder. The Himalayan Salt Scrub and Lavender Body Mousse are the post-long-run reset.
Microcosm Coaching — Endurance coaching from people who know what they're doing. Free consultations at microcosm-coaching.com.
Website: yourdietsuckspodcast.com — full episode pages, references, transcripts, and the blog.
Patreon: patreon.com/YourDietSucks — bonus episodes, monthly Q&As with Kylee, and the community thread. $3/month keeps us independent and ad-manager-free.
Merch: teepublic.com/user/your-diet-sucks — TeePublic shop. (Heads up: free Patreon members can win a YDS shirt by joining a paid tier between now and May 31. Drawing June 1.)
If this episode helped, send it to a friend who's been thinking about mailing their hair somewhere. Word of mouth is how this show grows.
SPONSORSMORE YDS

In 1997, a 14-year-old named Nathan Zahner convinced 43 out of 50 classmates to sign a petition banning a dangerous chemical called dihydrogen monoxide. The chemical was water. This episode is everything that happened next, scaled up to a $50 billion industry and, eventually, federal food policy.
Zoë and Kylee trace the naturalistic fallacy: the assumption that natural equals good and artificial equals bad. It's the implicit logic behind clean eating, anti-GMO panic, supplement marketing, anti-vaccine rhetoric, and a significant chunk of sports nutrition culture. This episode follows that logic from Sylvester Graham's Victorian theories about white flour and masturbation, through John Harvey Kellogg's Battle Creek Sanitarium, through the Make America Healthy Again commission's 2025 decision to replace heavily regulated synthetic dyes with natural alternatives that are, it turns out, subject to less FDA oversight than the dyes they replaced. Botulinum toxin is completely natural. Synthetic folic acid has prevented hundreds of thousands of neural tube defects. Nature is not a wellness coach. Your mitochondria are not reading the label.
FREE T-SHIRT GIVEAWAY — ends April 19thTwo ways to enter: leave a review on Apple Podcasts and DM us a screenshot on Instagram @yourdietsuckspodcast, or share any episode to your Instagram stories and tag us. Do both for two entries. Winner announced Saturday April 19th. US residents only.
SUPPORT THE SHOW: Join the Patreon at patreon.com/YourDietSucks — bonus episodes, Kylee's Q&As, Zoë's monthly blog, and a community of people who find this stuff as interesting as you do. Starting at $3/month.
Merch at teepublic.com/user/your-diet-sucks.

THIS EPISODE IS SUPPORTED BY
rabbit — 10% off at runinrabbit.com/collections/womens-new with code YOURDIETSUCKS10
Tailwind Nutrition — 20% off at tailwindnutrition.com with code YOURDIET20
Osmia — 20% off at osmiaskincare.com with code YDS20
Microcosm Coaching — Free consultation at microcosm-coaching.com

Find full episode transcripts, show notes, and research at yourdietsuckspodcast.com. Grab merch at teepublic.com/user/your-diet-sucks. And if you want bonus episodes, early access, and our eternal gratitude, support us on Patreon at patreon.com/YourDietSucks.
Caffeine is the most widely consumed psychoactive substance on earth — and somehow it's still got two extremely loud camps screaming past each other. On one side: the wellness-bro "caffeine destroys your adrenals, drink my mushroom latte" crowd. On the other: the guy on TikTok who takes 800 milligrams a day and wants you to up your dose. Both of them are wrong. Both of them are extremely entertaining.
In this episode, Zoë and Kylee dig into how caffeine actually works, the adenosine receptor science, the performance research, the optimal dosing for endurance athletes, and what it's actually doing to your sleep, hormones, and anxiety levels (spoiler: more than you think, less than the fear-mongers claim). They trace the history of human caffeine consumption from ancient China to Sufi monks using coffee as a pre-workout for night prayer, through the Enlightenment coffee houses that accidentally invented capitalism, all the way to a 300-milligram neon energy drink with a skull on it.
There's also a full breakdown of the pre-workout industry's stimulant escalation problem, why adrenal fatigue isn't a real diagnosis, how your menstrual cycle affects caffeine metabolism, and whether the caffeine taper before a race is actually worth the two weeks of misery.
Plus: the 1904 Olympic Marathon featured rat poison, brandy, and a man who hitched a ride in a car for 11 miles. Dry scooping sent multiple people to the hospital. And "energy is a choice" is not a peer-reviewed finding.
We cover it all.

This episode is supported by rabbit — use code YOURDIETSUCKS10 at runinrabbit.com/collections/womens-new for a discount on their trail line. By Osmia Skincare — use code YDS20 at osmiaskincare.com for 20% off. By Tailwind Nutrition at tailwindnutrition.com. And by Microcosm Coaching at microcosm-coaching.com.

Get "Carb Slut" and "Petty and Scientifically Literate" merch here!
Check out our website for references, transcripts, and more!
Diet culture is really good at one thing: finding the places people go to belong, and nesting inside them. This episode follows that instinct back to one of its oldest sources, the American evangelical church. Zoë and Kylee are joined by Leslie Schilling, RDN, CSSD, sports dietitian, eating disorder specialist, and author of Feed Yourself, to trace how food, bodies, and spiritual worthiness got so tangled together, and what it costs the people caught inside that tangle.
From Pope Gregory's taxonomy of gluttony in the sixth century to Rick Warren's Daniel Plan weigh-ins, "your body is a temple" taken wildly out of context, and why eating disorders tied to religious identity are among the hardest to treat. You don't have to have ever set foot in a church to have received this transmission.
Support Your Diet Sucks on Patreon for bonus episodes, weekly threads, recipes, and AMA access: patreon.com/yourdietsucks.
This episode is brought to you by rabbit — use code YDSMARCH10 for 10% off at rabbit.com. Osmia Skincare — code YDS20 for 20% off at osmiaskincare.com. Tailwind Nutrition — code YOURDIET20 for 20% off at tailwindnutrition.com. And Microcosm Coaching — book a free consultation at microcosm-coaching.com.