The Truth About Total Carbs vs. Net Carbs
A Diabetic’s Guide to Not Getting Tricked by Chocolate
Welcome to the Carb Confusion Show
If you’ve ever stared at a food label trying to figure out why something with 40 total carbs only has 3 net carbs, you’re not alone. This, my friends, is where food marketing and reality often part ways.
I used to believe in the magic of net carbs. “Oh, it only has 2 net carbs! It’s practically nothing!” And then my glucose monitor said, “You fool.”
So, what’s the deal? Are net carbs real, or just a scam designed to make diabetics feel better about eating things that will send their blood sugar on a rollercoaster? Buckle up, because we’re about to expose the great net carb mystery.
What Are Total Carbs?
Total carbs are the honest version of what’s in your food. This includes everything—fiber, sugar, sugar alcohols, and the sneaky little things that food scientists add to make products “keto-friendly” while still making them taste good.
Think of total carbs as the friend who always tells you the truth, even when you don’t want to hear it. “Yes, that ‘low-carb’ tortilla is actually a carbohydrate bomb in disguise.” Thanks, total carbs. Appreciate you.
The Mystery of Net Carbs
Now, here’s where things get interesting. The concept of net carbs is simple:
Total Carbs – Fiber – Certain Sugar Alcohols = Net Carbs
The idea is that fiber and some sugar alcohols don’t impact blood sugar, so we just pretend they don’t exist. Poof! Gone! Magic!
But, as any diabetic who has been bamboozled by a “low net carb” snack can tell you, this is not always how it works.
My Personal Science Experiment: Are Net Carbs Relative?
Let’s talk about my great hot cocoa ball catastrophe. This was one of those hollow chocolate spheres filled with marshmallows that dissolve when you pour hot milk over them. The package proudly declared:
Total Carbs: 34g
Fiber: 32g
Net Carbs: 2g
If math were the only thing that mattered, I should have been able to drink this and move on with my life. But my blood sugar had other plans. After drinking that, my glucose spiked so high that I could have felt a little sugar coma coming on.
On the other hand, I’ve had foods with 10 total carbs and 4 net carbs, and my blood sugar barely budged. So what gives?
Turns out, not all fiber is created equal. Some fiber (like insoluble fiber) passes through your body without doing much. Other fiber (like certain prebiotic fibers) actually do break down and affect blood sugar. But hey, legally, they can still call it fiber!
The Great Fiber and Sugar Alcohol Scam
Not All Fiber Is Your Friend
Some fiber truly doesn’t impact blood sugar. But some—especially the kinds added to processed foods—can break down into digestible carbohydrates. Translation: you’re eating more carbs than you think.
If a food has 35 total carbs and 30 grams of fiber, be suspicious. That’s like someone saying they make six figures a year but “most of it is in exposure.” Something isn’t adding up.
Sugar Alcohols: Friend or Foe?
Some sugar alcohols are safe for diabetics (like erythritol), but others (like maltitol) act suspiciously like real sugar in your bloodstream. If you see maltitol or sorbitol in your “low net carb” treat, prepare for a potential glucose spike… and maybe an unexpected sprint to the bathroom.
So, What’s a Diabetic Supposed to Do?
Don’t trust packaging blindly. Marketers will do anything to make a product seem “low-carb” when it’s really just low-truth.
Use total carbs as a baseline. Net carbs might be useful, but total carbs give you the full picture.
Test, test, test. Your glucose monitor is the only opinion that matters.
Be skeptical of too-good-to-be-true foods. A 30-carb candy bar that magically turns into 2 net carbs? Suspicious.
Stick to real food. Whole foods don’t need a net carb equation to convince you they’re good for you.
The Truth About Net Carbs
So, are net carbs a scam? Kinda. They’re not totally useless, but they’re definitely not a free pass to eat whatever you want. Some fibers and sugar alcohols do impact blood sugar, and your glucose monitor is the only real authority here.
If you take one thing away from this, let it be this: just because a label says “low net carbs” doesn’t mean it won’t launch your blood sugar into orbit.
And that hot cocoa ball? Yeah, I should’ve just had a Dairy Queen dip cone instead.
Chat soon,
David Perdew
Former Journalist
Serial Entrepreneur
Former Independent Systems Consultant
Founders of NAMS, Inc.
Author
Newly Retired (kind of)
What did you think of today’s newsletter?
If you loved it, refer it to a friend or drop a comment below.
And if you really want to promote it, consider sharing it.