7 Common Signs Your Metabolism Is Slowing Down (And What You Can Do About It)
Your metabolism is your body’s engine—it’s what drives energy, fat burning, and overall vitality. But sometimes, that engine starts to sputter. Whether it’s due to age, chronic stress, under-eating, or hormonal shifts, a sluggish metabolism can sneak up on you and disrupt how you feel every day. If you’ve been feeling “off” and can’t quite put your finger on it, your metabolism might be trying to send you a signal. Let’s dive into the top signs your metabolism is slowing down and what you can do to rev it back up.
Metabolism is the body’s system for turning food into energy through a network of enzymes and chemical processes—it’s one of the key markers of life. A healthy metabolism is essential for overall health and is shaped by your lifestyle, how much energy you take in, and how much you use. Maintaining a healthy weight and strong metabolism depends on balanced habits—nutritious eating, regular exercise, good sleep, and supportive daily routines. Be sure to check out my Mastering Metabolism blog for more insight into what metabolism really is.
Signs your Metabolism could be Slowing
We know understand that a slowed metabolism means your body is less efficient at converting the food you eat (calories) into usable energy than usual. Your metabolic rate is influenced by many factors – including age, gender, muscle-to-fat ratio, amount of physical activity and hormone function.
1. Fatigue or Low Energy

You’re getting plenty of sleep, but you still feel drained. Sound familiar? When your metabolism slows, your cells aren’t producing energy efficiently. This can leave you feeling exhausted, unmotivated, and even foggy. Blood sugar imbalances or thyroid dysfunction are often culprits here. As a result, you might experience increased cravings, particularly for sugary or starchy foods, as the body tries to get more energy.
2. Unexplained Weight Gain or Difficulty Losing Weight
If your weight has crept up without any major changes in your habits, it could be metabolic. A slower metabolism burns fewer calories at rest, meaning even the same meals and activities might now lead to weight gain—especially around the midsection. Insulin resistance, high cortisol, and estrogen dominance can all play a role. Chronic stress and poor sleep don’t help either.

3. Cold Intolerance

Always reaching for a sweater, even in warm temps? When your thyroid—the metabolic thermostat of the body—is underperforming, your internal temperature may drop. This is a common but often overlooked sign of a sluggish metabolism.
4. Constipation or Slower Digestion
Metabolism doesn’t just affect weight—it influences digestion too. A sluggish metabolism can result in slowed digestion, causing constipation, bloating, or other digestive issues. Reduced energy availability slows gut motility. If your gut is sluggish, it could be a sign that your entire system is slowing down. Supporting gut health with hydration, fiber, and fermented foods is key.

5. Brain Fog or Low Mood

Poor memory, difficulty concentrating, or feeling down for no obvious reason? When your cells aren’t converting nutrients into usable energy efficiently, your brain suffers too. This is often tied to blood sugar crashes, mitochondrial dysfunction, and nutrient deficiencies.
6. Thinning Hair or Brittle Nails
Your hair and nails reflect your internal health. Thinning, shedding, or slow-growing hair could point to protein or micronutrient deficiencies, poor thyroid function, or stress. Your body prioritizes survival, not beauty, when resources are low.

7. Hormonal Irregularities

Irregular or missed periods, PMS, and low libido can all be signs of hormonal imbalance. Key hormones like estrogen, progesterone, and testosterone play a major role in your metabolic health, so when they’re off, your metabolism often is too. Thyroid hormones also regulate how your body uses glucose, burns fat, and stores energy—so disruptions here can significantly impact your metabolic function.
What You Can Do About It
The good news? You have more control than you think. Here are simple, foundational steps to support a healthier, more efficient metabolism:
- Eat enough – especially protein and healthy fats
- Balance blood sugar with regular meals and real food
- Strength train to support lean muscle and metabolic function
- Move daily beyond the gym (walking, stretching, mobility)
- Prioritize sleep and manage stress (this includes saying no and resting!)
- Support your gut with fiber, fermented foods, and hydration
- Get tested if needed: thyroid panel, sex hormones, nutrient status
Your metabolism is your body’s internal engine — and just like a car, it needs the right fuel and maintenance to run well. If you’re noticing any of these signs, don’t ignore them. They may be gentle nudges from your body asking for more support.
Don’t Wait – Live Better Today!
By making intentional shifts to how you eat, move, sleep, and manage stress, you can reignite your metabolism and feel more energized, focused, and in control. Small steps really do make a big impact. Now is the time to start tuning in and taking action. Schedule your consultation today for a lab to gain a better understanding of your current health.