Education · From Jonathan Carp, MD
Become your own authority in health.
Three kinds of reads from Jonathan Carp, MD — Lessons for the deep why on blood sugar, fiber, and protein; quick Notes with one idea each; and Recipes built on a base that keeps you full and satisfied. No hype, no hard sell. Just how it works.
Dr. Carp's Classes
Your biological birthright: 5 abilities you were born with
Interoception, breath, imagery, expectation and neuroplasticity are five ways to take part in your own biology. Most of us were never taught to use them. From Jonathan Carp, MD.
Protein and fasting: why protein alone isn't enough
Protein tells your body to build, but a body that only builds never gets to clean up. Here's the build-and-repair rhythm, mTOR and AMPK, told through a VIP nightclub, and how to set it up at your own table. From Jonathan Carp, MD.
The perfect metabolic day: a daily routine for metabolic health
Your body isn't the same at 8 a.m. and 8 p.m. Here's how light, cortisol, muscle, meals, and screens change the rules hour by hour, and how to build a day around them. From Jonathan Carp, MD.
Why muscle is your most underrated metabolic organ
Muscle does far more than move you. It's the biggest furnace for the sugar from your meals and a messenger to the rest of your body. Here's why using it puts up a do-not-demolish sign, and how to start with two sessions a week. From Jonathan Carp, MD.
How to increase GLP-1 naturally: the doorbell in your gut
Your gut already knows how to send the GLP-1 message. Here's what quietly blocks it, and the everyday levers, from protein first to morning light, that help it ring again. From Jonathan Carp, MD.
How GLP-1 works in the body, and what it teaches us
One small message from your gut coordinates your pancreas, liver, stomach, and brain after every meal. Follow it, and you learn how the whole body decides when you're hungry, when you're full, and what to do with fuel. From Jonathan Carp, MD.
The gut-skin axis: what your skin is trying to tell you
Your gut and your skin are in constant conversation, so your skin ends up reporting on what's happening inside. A dermatologist's guide to reading the report card. From Jonathan Carp, MD.
The gut barrier: how butyrate keeps your gut's velvet rope up
Your gut barrier is one cell thick, and it runs on butyrate, a currency the bacteria in your gut make from fiber. Here's how the velvet rope stays up. From Jonathan Carp, MD.
GLP-1 facts: ten things I want every patient to know
GLP-1 isn't a drug. It's a message your gut already sends, and the medications turn up its volume. Here are the ten facts I teach so the quiet they create gets used well. From Jonathan Carp, MD.
What is GABA? Your brain's natural brake pedal
Your nervous system has a gas pedal and a brake pedal, and most of us never touch the brake. Here's what GABA is, what wears it down, how the natural bacteria in your gut and your own breath connect to it, and a simple day built around pressing it. From Jonathan Carp, MD.
Fight or flight response: when the lion isn't real
Your body runs the same alarm for a lion and a late bus. Here's what my teacher Dr. Gerald Epstein called the false emergency state, why it feels so real, and the five-step check he taught for stepping out of it. From Jonathan Carp, MD.
Do calories matter? Why weight is more than a bank account
Calories set the direction, but four layers of biology decide how the math actually plays out: the thermic effect of food, satiety signaling, body composition, and metabolic adaptation. From Jonathan Carp, MD.
Chronic inflammation: the quiet fire behind so much of your health
Acute inflammation heals a sprained ankle and then packs up. Chronic inflammation is the same system that never goes home. Here's what keeps it lit, where it does its damage, and the everyday levers that turn it down. From Jonathan Carp, MD.
The 7 blood tests everyone should know about
A lab's "normal" range tells you whether you've crossed into a diagnosis, not whether you're thriving. Here are the seven blood tests I think everyone should know by name, what each number tells you, and how to bring them to your own doctor. From Jonathan Carp, MD.
After stopping a GLP-1 medication: when the cast comes off
When a GLP-1 medication stops, hunger can come back louder than before. That's biology, not a willpower failure. Here's why the signals return, and the routines to build while the cast is still on. From Jonathan Carp, MD.
Blood Sugar
The blood-sugar lesson →
The 3pm crash, explained
The slump isn’t about willpower — it’s the comedown from a spike you can avoid. Here’s the meal that keeps the afternoon level.
Glycation, explained: what steady blood sugar does for you
When blood sugar runs high, sugar binds the protein in your collagen. Keeping it steady is one of the simplest ways to protect it.
Coming soon
Protein first: one simple rule for steadier days
Eat your protein before your carbs and the same meal lands softer, because protein slows digestion. A one-sentence habit with an outsized effect.
Your Gut & Fiber
Start with konjac →
Soluble vs insoluble fiber: a two-bucket guide
Two kinds of fiber, two different jobs — and one of them is food for the natural bacteria in your gut. The simplest way to tell them apart.
Prebiotic, probiotic, postbiotic — the order that matters
The food, the bacteria, and what they make. Get the sequence right and your whole system runs a little smoother.
A happy gut runs the whole show
When the bacteria in your gut are well-fed, everything downstream — energy, fullness, comfort — tends to run smoother. Here’s the why.
From the founder
Participate in your own health.
I don’t want you to depend on me. I want you to understand the mechanism — why a steady blood sugar matters, what soluble fiber does for the bacteria in your gut — so you can make your own decisions. That’s the whole point of these notes.
Jonathan Carp, MD · Founder & curator · since 2006Eating Lighter
Start here →
Eating less these days? Make every bite count
When you’re eating less, the quality of each bite matters more. Build the plate around clean protein and gentle fiber, and a small meal still satisfies.
Give props to propionate: your gut’s own satiety signal
Feed the right fiber and the bacteria in your gut make a short-chain fat that supports your body’s own fullness signaling. The natural pathway, explained.
Why fullness isn’t willpower — it’s a system
Satiety isn’t a battle you white-knuckle. It’s protein, fiber, and a steady blood sugar working together. Set the system and the cravings quiet down.
Coming soonNotes from Jonathan Carp, MD
Short reads — one idea each, a couple of minutes, structure-function plain. The quick companions to the longer lessons above.
The Two Kinds of Fiber in Your Noodles
Fiber isn’t one thing. It’s two — and only one of them feeds the bacteria living in your gut.
Note · Daily RitualWhy One Bowl a Day
Not a diet. Not a cleanse. A daily habit — because the easiest habit to keep is the one you enjoy eating.
Note · Gut & FiberMeet Glucomannan
The fiber in konjac has a name — and it’s one of the most studied prebiotic fibers there is.
Note · ProteinWhy Egg Whites Are a "Clean" Protein
Ten grams of protein, forty-five calories, three ingredients — protein your body actually recognizes.
Note · Gut & FiberDaily Fiber, Explained
Fiber works on a daily schedule — because the bacteria it feeds are working every day.
Note · Gut & FiberPrebiotic vs. Probiotic
The prebiotic is the food. The probiotic is the bacteria. Skip the food and the rest has less to work with.
Note · Blood SugarWhat a Blood-Sugar Spike Does to Your Energy
The spike isn’t really the problem. The crash that follows it is — and that’s your afternoon slump.
Note · MetabolismMetabolic Flexibility, Explained Simply
A flexible body switches between fuels easily. Steadier meals make that switch easier.
Note · Protein10g Protein. 45 Calories. Three Ingredients.
Three numbers do a lot of work — and together they explain why this is such an easy daily protein.
Note · Mindset"Become Your Own Authority"
The goal isn’t to hand your health to an expert. It’s to understand enough to make your own decisions.
Note · HabitThe Habit Is the Result
You don’t get the outcome and then keep the habit. The habit, repeated, is the outcome.
