If Eating Is So Good for You, Why Does It Feel So Bad?

There's a version of this conversation that I never thought I'd need to have on the podcast. Not because it's not important, but because eating feels like it should be the one thing our bodies just know how to do.

And then you get a chronic illness. And suddenly, even that isn't simple anymore. Or… maybe it never was to begin with.

I sat down with Tiffany Pecoraro, a registered dietitian who specializes in eating disorders and co-occurring chronic illness, to talk about what happens when the very act of nourishing your body becomes complicated, confusing, or even frightening. Tiffany runs Freedom with Nutrition, a telehealth private practice specializing in co-occuring eating disorders and chronic illnesses (yes, including ones like MCAS). I hope this conversation gives you exactly what you need it to as you read or listen to it.

First, A Content Warning Worth Taking Seriously

Before we get into it — and before you keep reading — this episode came with a significant content warning for anyone who is in early eating disorder recovery, or not yet in recovery at all. Some of what we cover could be triggering.

If that's you, please have proper support in place with an eating disorder therapist and/or dietitian before listening to the episode. Or, skip the episode altogether. This blog is meant to be educational, not a replacement for that.

The Conditions Nobody Warned You About

One of the first things Tiffany brought up was just how many chronic conditions commonly co-occur with eating disorders. We're talking:

  • POTS (one of the more well-known pairings)

  • Hypermobile EDS

  • IBS, IBD, Crohn's, colitis

  • MCAS (mast cell activation syndrome)

  • Autoimmune conditions

And here's where it starts to get complicated: a lot of the dietary guidance that circulates online for these conditions — elimination diets, low-histamine protocols, the AIP diet — can, in certain situations, make disordered eating patterns worse or create new ones.

This isn't about blame. It's about how easy it is to start restricting "for your health" and end up somewhere you didn't intend to go.

MCAS, Elimination Diets, and the Controversy Nobody Wants to Touch

Tiffany went somewhere I really appreciated: the fact that MCAS itself is still controversial in some clinical circles.

There are providers who question whether it's a real diagnosis at all. And then, even among those who accept it, there's a whole separate debate about what it means dietarily. Because having MCAS doesn't automatically mean you need to go low-histamine or eliminate half your pantry. But that message doesn't always make it to patients — especially when they're already scared and symptomatic and looking for answers.

When food becomes something to fear, and restriction starts to feel protective, that's where the eating disorder piece can quickly take root.

Your Body Is Giving You Real, Physical Signals.

We just don’t always know how to interpret them.

This was one of the most important parts of our conversation.

We talk a lot in the nutrition world about intuitive eating — the idea that your body will tell you what it needs, and your job is to listen. And that's a beautiful framework in theory.

But as Tiffany said, sometimes the signals our bodies give us are real, but the way we interpret them may not be accurate.

Someone with anorexia might feel genuinely full after eating very little. That fullness is real — it's not made up. But it's also not reflective of what their body actually needs. (PS - that doesn’t mean you should just ignore all your signals and push yourself without any guidance). The same thing can happen with POTS, where eating might make you feel worse, so your nervous system learns to associate eating with discomfort and starts avoiding it. Or the reverse — blood sugar dips that feel so distressing that eating becomes the only way to manage the panic, and our eating patterns eventually become disordered over time.

What I shared in this episode from my own experience: I downloaded MyFitnessPal once — not to restrict, but to try to hold myself accountable to eating more fruits and vegetables. What I quickly realized was that I was filling up on huge salads, feeling full, and then eating way fewer calories than I needed. I thought my body was telling me it was satisfied. And I guess it was technically “satisfied,” but it wasn’t actually nourished. I just conflated the two.

A Two-Week Reality Test

When you're shifting eating patterns — especially after chronic undereating — the first two weeks are often really uncomfortable.

Tiffany talked about this directly, and I think it's one of the most validating pieces of information that all people who struggle to eat need to hear. Even outside of chronic illness, people starting eating disorder recovery commonly experience:

  • Constipation

  • Reflux

  • Stomach pain

  • Extreme fullness

And that's normal. Expected, even. The problem is, when you already have a chronic condition, those symptoms can feel like proof that you're doing something wrong — when actually, they might just be proof that change is happening, which doesn’t actually tell you if it’s right or wrong yet.

As a therapist, this is exactly the kind of thing I'd call trauma-informed care: helping people understand that the resistance to change makes complete sense given everything they've been through. That it's not pathological. That two weeks is survivable, especially when we're talking about people who have been managing chronic illness for years.

After that two-week window, Tiffany said the process becomes more individualized — figuring out what's lingering, what needs to be adjusted, and when it's time to bring in additional medical support.

Rigid Rules vs. Consistent Structure

There was a tension that Tiffany and I kept circling back to: how do you help someone follow a structured eating plan without making it feel like another thing being done to them?

Because a lot of people with chronic illness have had their autonomy stripped away, repeatedly, by a medical system that hasn't always gotten it right. And now you're asking them to eat three times a day, on a schedule, in a way that might not feel intuitive — and call it healing.

We came around in to the idea that the goal is consistent, and there's unlimited flexibility in how you get there. It doesn't have to be solid food. It doesn't have to be the same thing every day. It doesn't mean you failed if today was a protein shake and crackers. The consistency is in the direction you're moving, not the exact path you take.

Something I often said when I worked with parents: provide consistency with flexibility. That same principle absolutely applies here.

A Note on GLP-1s

Tiffany ended with something I'm really glad we included. GLP-1 medications are showing up in chronic illness treatment more and more — often for inflammation management, at microdoses that aren't primarily about weight.

But at more typical doses? They significantly suppress appetite.

And if your goal is also to nourish your body adequately, that's something to pay attention to. Tiffany's take: she's not against GLP-1s, but she'd want someone working with you on nutrition alongside them — so you know the minimum you don't want to go below, even when your appetite says otherwise.

What to Take From This

I said at the top of this episode that we can walk away with very different things depending on where we are in our own journey, and I meant that. So rather than one clean takeaway, here's the thread I'd ask you to hold onto:

Your body's signals are worth listening to. And sometimes, those signals need a translator.

That's simply what it means to have a complicated body in a complicated world. And it's exactly why working with someone who understands both the eating disorder piece and the chronic illness piece matters so much.

Eating is fundamental to life. And you deserve support in making it work for yours.

Disclaimer: Everything we discuss here is just meant to be general education and information. It's not intended as personal mental health or medical advice. If you have any questions related to your unique circumstances, please contact a licensed therapist or medical professional in your state of residence.

Destiny Davis, LPC CRC, is solely responsible for the content of this article. The views expressed herein may or may not necessarily reflect the opinions of the guest.

The content in this blog post comes directly from a real, human interview between Destiny and her guest on The Chronic Illness Therapist Podcast. This written version was formatted using AI. Listen to the full episode to hear the actual conversation.

Listen to my full conversation with Tiffany Pecoraro on Ep 123: If Eating Is So Good for You, Why Does It Feel So Bad?

Listen on Apple

Listen on Spotify

 
Podcast cover art for "The Chronic Illness Therapist Podcast with Destiny Davis, LPC CRC

Listen to Tiffany’s interview with me, Destiny Davis, on Ep 123: If Eating Is So Good for You, Why Does It Feel So Bad?

Listen on Apple

Listen on Spotify


Close-up portrait of Tiffany Pecoraro, registered dietitian and founder of Freedom With Nutrition, smiling with green foliage in the background

Tiffany Pecoraro is a registered dietitian and founder of Freedom With Nutrition, a telehealth practice specializing in eating disorder recovery alongside co-occurring chronic illness. With nine years of experience across every level of eating disorder treatment — from inpatient to outpatient care — Tiffany noticed a pattern: people would complete treatment and still be struggling, not because they were recovering "wrong," but because their full health picture was never addressed. Drawing from her own recovery journey and autoimmune diagnosis, she built her practice around the integration that was missing: collaborative, science-based care that holds space for both eating disorder recovery and chronic illness at the same time. She has been quoted as an expert in publications including the Chicago Tribune and Food & Nutrition Magazine.

Connect with Tiffany:
Website
Instagram
Facebook


Destiny Davis, LPC CRC, smiling in a pink sweater standing outdoors with crossed arms

Meet Destiny - The host of The Chronic Illness Therapist Podcast and a licensed mental health therapist in the states of Georgia and Florida. Destiny offers traditional 50-minute therapy sessions as well as therapy intensives and monthly online workshops for the chronic illness community.

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When Your Nervous System Shows the Problem and Has Part of the Solution: MCAS & Mast Cell Disorders

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