Ageless Conversations - February 16, 2025

Why We Need Carbohydrates in a Healthy Aging Diet

Carbohydrates have gotten a pretty bad reputation over the years. One minute they’re the villain, and the next they’re the hero. But studies show that good‑quality carbohydrates actually support healthy aging, so it’s worth understanding what they are and why our bodies still need them.

For years, if someone had asked me what a “good carb” was, I would’ve proudly answered, “Whole wheat bread! Brown rice!” And yes — ding ding — that’s correct. But it turns out there’s a lot more to carbohydrates than the bread aisle.

Let’s break it down in a way that makes sense and doesn’t require a biochemistry degree, which I sadly lack.

Carbohydrates: What Are They, Really?

Low‑carb diets have been all the rage, and sure, they can help with weight loss. But the term “low‑carb” is a little misleading, because carbohydrates are everywhere, and not just in bread and pasta.

A carbohydrate is simply one of the three major nutrients our bodies need, made up of:
- Fiber
- Starch
- Sugar

Carbs show up in grains, legumes, vegetables, fruits, and even nuts. Why did no one tell me this? To understand carbs better, let’s look at each component.

Fiber

If carbs had a superhero, it would be fiber. Fiber helps:

 - Keep your gut healthy
 - Lower cholesterol
 - Reduce inflammation
 - Support healthy blood pressure 
 - Maintain a healthy weight

High‑fiber foods include:
 - Whole grains
 - Beans and legumes
 - Vegetables
 - Fruits

These foods digest slowly, keep us full, and help stabilize blood sugar. Also, if you dislike those constipation situations, fiber is your friend.

Starch

Starches are complex carbohydrates found in foods like: 

 - Whole grains
 - Potatoes and other Root vegetables
 - Beans

Our bodies have to break down starches before using them, which is a good thing unless they are highly processed. The problem is that many of us prefer starches that have been highly processed and these digest quickly and act like sugar in our system. Unfortunately they also taste yummy. Who invented those? I’d like to have a word. Highly refined starches include:

 - White flour
 - White rice
 - Sugary cereals
 - French fries
 - Chips

These behave more like sugar in the body, causing quick spikes and crashes. On the other hand, whole grains, cooked oats, beans, and whole sweet potatoes with the skin offer steady energy and real nutrition.

Think of it this way: A whole sweet potato is like a reliable old friend. A bag of chips is like that weird cousin with one tooth and a smelly t-shirt who shows up unannounced and leaves your house a wreck.

Sugar: Proceed With Caution

Sugars are simple carbohydrates that digest quickly. Foods high in added sugar, such as sodas, candy, and desserts, can cause blood sugar swings and contribute to inflammation, and brain and heart issues.

But not all sugar is created equal. Whole fruit contains natural sugar plus fiber, vitamins, and antioxidants. That fiber slows digestion and keeps your blood sugar from spiking too much.

A helpful tip: When reading labels, look for ingredients ending in “‑ose.” That’s usually sugar in disguise, and believe me, it’s in everything.

Why Do Carbs Get Their Own Section on the Plate?

If vegetables and fruits contain carbohydrates, why does the healthy plate still include a separate “carbohydrates” section?

Here’s the simple answer:
- Vegetables are nutritional powerhouses, so they get their own generous section.
- Fruits are nutritious but contain natural sugars, so they fit better in the snack or dessert category.
- Carbohydrate foods like whole grains, legumes, and starchy vegetables provide energy, fiber, and essential nutrients that complement the vegetables and protein on your plate. We are going to clarify this by calling that section “whole grain, starchy carbohydrates.”

It’s the perfect meal combo that supports healthy aging.

Plus, we can actually make them taste good, which matters, because no one wants to spend their golden years chewing on stuff that tastes like cardboard.

Learn how Carbs fit into your broader daily nutrition plan. 

Explore Nutrition Pillar

Sources: 
High-quality carbohydrates in midlife may keep women healthier as they age - Harvard Health
Carbs: Cutting through the confusion - Harvard Health
Types of Carbohydrates | ADA