5 Nutrition Myths Women in Their 40s Still Believe (and What To Do Instead)

Metabolic Mastery

Dec 20

Let’s get real for a second.

If you’ve been around the diet block a few times, you’ve probably been told that carbs are evil, fasting fixes everything, and protein will make you “bulky.” The truth? Most of what women in their 40s still believe about nutrition is leftover from the early 2000s — and your metabolism deserves an upgrade.

Your body’s not broken. It’s just ready for smarter fuel.

Nutrition Myths Women in Their 40s Still Believe

Myth #1: “Carbs make you gain fat”

Carbs don’t make you gain fat- excess calories do. What carbs can do, though, is help you lift heavier, sleep deeper, and stabilize your mood when you choose the right ones and time them well.

Choose complex carbs (quinoa, oats, rice, potatoes).
Keep portions balanced with protein and fiber.
And yes- fruit counts as a good carb. Stop fearing bananas.

Hart Method Tip: Aim to pair every carb with protein. Think Greek yogurt + berries, or eggs + toast.

Myth #2: “You have to eat less to weigh less”

Cutting calories too hard backfires every time. It tanks your metabolism, disrupts hormones, and leaves you cranky, sleepless, and craving sugar.

Reverse dieting and metabolic repair are about fueling enough- not starving to fit into a smaller dress size.

Hart Method Tip: If your calories are already low and you’re not seeing progress, the answer is probably more, not less.

Myth #3: “Protein will make me bulky”

Let’s clear this one once and for all. Protein doesn’t make you bulky- cupcakes and cortisol do.

Protein builds lean muscle, balances blood sugar, keeps you full, and helps you burn more at rest. The average woman over 40 should aim for at least 0.8–1g per pound of body weight, depending on activity level.

Hart Method Tip: Start small- add 10–15g more protein daily (a scoop of whey, an extra egg, or 3oz chicken at lunch).

Myth #4: “Fasting fixes everything”

Fasting can work for some- but if you’re a woman in perimenopause, under stress, or strength training regularly, skipping breakfast might be sabotaging your hormones.

When cortisol’s high and blood sugar dips, your body clings to fat and increases cravings later in the day.

Hart Method Tip: Focus on balanced breakfast over fasting- think eggs, avocado, and fruit within an hour of waking.

Myth #5: “You can out-exercise a bad diet”

You can’t burn off imbalance. Training is the stimulus; food is the recovery. You need both.

Most women in their 40s don’t struggle with motivation- they struggle with under-fueling, poor recovery, and inconsistent habits.

Hart Method Tip: Instead of asking, “Did I work out hard enough?” ask, “Did I eat enough to support what I’m asking of my body?”

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The Truth: Nutrition isn’t punishment- it’s information

Your body changes with time, and your habits should too. When you start feeding yourself like someone who values energy, strength, and sanity, your metabolism will respond in kind.

If you’re ready to stop guessing and start fueling smarter, grab my free Portion Control by Hart guide, it breaks down how to build balanced meals without obsession or math.