Why You’re So Tired (It’s Not What You Think): The Truth About Carbs, Digestion and Hydration

Within Nutrition by Kylie

Within Nutrition by Kylie
Why You’re So Tired (It’s Not What You Think): The Truth About Carbs, Digestion and Hydration
Mar 27, 2026
Kylie Ivanir

In this episode, Kylie shares three often-overlooked reasons why your energy may feel lower than it should - even if you’re eating well and trying to take care of yourself.

She breaks down why carbs are not the enemy, how poor digestion can drain energy instead of creating it and why under-hydration is one of the most common but underestimated reasons women feel tired, foggy and flat.

This episode is especially for women who feel like low energy has become “normal” - and want to understand what may really be going on under the surface.

In this episode, Kylie covers:

  • Why carbs are not the enemy - and how the type, timing and context matter most
  • Why fruit is not something to fear, even if you’re thinking about blood sugar
  • How poor carb tolerance may be a sign your metabolism needs more support
  • Why low-carb can backfire for many women, especially long term
  • How digestion may be taking more energy than it’s giving you
  • Signs your gut and digestive system may need more support
  • The impact of low stomach acid, stress, poor enzyme activity and gut imbalances
  • Why hydration is essential for energy, focus, digestion and cellular function
  • Why minerals may matter just as much as water intake
  • Simple shifts to start supporting your energy right away

We dive into three key areas that are often overlooked when it comes to energy: how your body is handling carbohydrates, whether your digestion is actually supporting you (or draining you) and why hydration plays a much bigger role than most people realize.

Because low energy isn’t something you just have to accept.

When your body is properly supported, food should give you energy, your digestion should feel easy and your energy should feel steady throughout the day.

This episode will help you understand what may be happening under the surface - and where to start.

Timestamps

00:00 Intro: why energy matters
02:03 Carbs, blood sugar and energy
05:52 Why fruit is not the enemy
09:02 When carbs are a sign something deeper needs support
12:41 Why digestion may be draining your energy
15:12 Low stomach acid, stress and enzyme support
18:43 Gut imbalances and nutrient absorption
21:23 Why hydration matters for energy
24:10 Water, minerals and practical hydration tips
27:10 Final recap


Meet Kylie

Kylie Ivanir, MS, RD, is a globally recognized dietitian and founder of Within Nutrition. She helps women worldwide improve gut health, balance hormones, and restore energy through personalized, biology-aligned nutrition and lifestyle support.

Credentials:
B.S. in Physiological Sciences, UCLA
M.S. in Human Nutrition, Columbia University Medical Center
Registered Dietitian, Columbia University

Welcome to the Within Nutrition Podcast.

There is so much noise in the health world that often sounds so convincing but doesn't actually work for you so we're here to breakdown the science, challenge the common myths and share the strategies that truly make a difference for you.

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