Low Energy on a GLP-1? Nutrients That Support How You Feel

PLEASE NOTE: The information in this blog is for educational purposes only. It is not a substitute for professional medical advice. Consult your healthcare provider if you’re seeking medical advice, diagnoses, or treatment.

GLP-1 medications can make it much easier to eat less. For some people, that is exactly why they work.

But appetite isn’t some inconvenience to shut off. It’s one of the signals that helps drive you to eat enough food.

When that signal gets quieter, it becomes easier to eat too little without really noticing. Protein drops. Meals get smaller. You drink less. Nutrient-dense foods can disappear simply because there is not much appetite left for them.

So if your energy drops on Ozempic, Wegovy, Mounjaro, or Zepbound, one of the first things to look at is what happened to your food intake when your hunger changed.

A medication can reduce appetite. It cannot make a small meal nutrient-dense for you.

That is where food quality starts to matter even more. Meat, organs, eggs, dairy, seafood, fruit, and root vegetables give you more nutrition from the food you are still able to eat.

Low energy can also come from dehydration, nausea, vomiting, diarrhea, poor sleep, rapid weight loss, or loss of lean mass. And sometimes fatigue has nothing to do with the GLP-1 at all. Anemia, low blood sugar, thyroid problems, nutrient deficiencies, and other health conditions can feel very similar.

This guide helps you work through those possibilities, starting with the most basic question.

Can a GLP-1 Cause Fatigue?

Yes. GLP-1 medications can be associated with fatigue, but feeling tired does not automatically mean the medication itself is the whole problem.

A Doctor's Take on Ozempic

The Ozempic prescribing information lists fatigue among reported adverse reactions, and other GLP-1 medications use related terms such as lethargy, malaise, or asthenia.

But look at what else changes when appetite drops.

You may be eating hundreds of calories less than before. A full serving of meat may feel too big. You may drink less because you are eating less. Nausea or diarrhea can make that worse. And if weight is coming off quickly, some of that weight can come from lean mass as well as body fat.

Turning down hunger doesn’t turn down your body’s need for protein, minerals, fluids, and enough energy to function.

That’s why the better question is not only whether Ozempic can make you tired.

Ask what changed after you started taking it.

Are you finishing your protein? Are meat, eggs, dairy, seafood, organs, fruit, and root vegetables still showing up regularly? Are you drinking enough? Are you losing weight so quickly that strength and muscle are slipping with it?

Those answers often tell you more than the word “fatigue” by itself.

Can Wegovy, Mounjaro, or Zepbound Make You Feel Tired?

Yes. Low energy can happen with Wegovy, Mounjaro, and Zepbound too. The medication may be part of the picture. What happened to your nutrition after your appetite changed may be another big part of it.

Why Am I So Tired on Ozempic?

Fatigue on Ozempic can come from the medication, but it can also come from what happens after hunger drops. You may simply be eating and drinking less than your body needs, losing muscle, or missing nutrients that used to come from larger meals.

Hunger isn’t a flaw in the system. It’s one of the signals that has helped humans survive. GLP-1 medications deliberately turn that signal down.

That can be useful. But less hunger doesn’t mean your body suddenly needs less protein, fewer minerals, or less nourishment.

So when energy drops, look at what changed after your appetite did.

You May Simply Be Eating Too Little

Ozempic can make skipping meals feel effortless. 

If portions keep shrinking, you may end up taking in far less energy than you realize. Weakness, feeling cold, poor concentration, declining exercise performance, or simply feeling flat can all be clues that the gap has become too large.

There’s another piece here that often gets lost.

Food quality influences fullness too. Protein-rich whole foods trigger some of the same natural satiety systems your body already uses, including GLP-1. Meat, eggs, dairy, and seafood can help make a meal satisfying while still bringing protein and micronutrients with them.

A medication can suppress hunger. The better long-term question is whether the food you are eating is nourishing enough to support the body underneath that appetite change.

You May Not Be Getting Enough Protein

When hunger disappears, protein is one of the easiest things to accidentally lose with it.

That creates a problem because the goal isn’t simply to make the scale move. You want to lose body fat while keeping as much muscle and strength as possible.

Prioritize beef, eggs, Greek yogurt, cottage cheese, fish, poultry, and whey before filling the little appetite you have with foods that bring less protein.

The 2025 joint advisory also places adequate protein, nutrient-dense food, and resistance exercise among the main priorities for maintaining muscle and nutritional status during GLP-1 treatment.

Weight loss isn’t automatically a win if too much of what you are losing is muscle.

You May Be Dehydrated

Appetite and thirst don’t operate in separate worlds.

When people eat less, they often drink less too. Add vomiting or diarrhea and fluid losses can climb quickly.

Dark urine, dry mouth, headache, dizziness, weakness, a racing heart, or much less urination are worth paying attention to.

GLP-1 medication labeling warns that dehydration from gastrointestinal side effects can contribute to acute kidney injury.

If you have kidney disease, heart disease, or have been told to limit fluids, follow your own medical guidance rather than generic hydration advice.

Your Blood Sugar May Be Too Low

Ozempic by itself has a lower risk of hypoglycemia than medications such as insulin or sulfonylureas. The picture changes when they are used together.

Very low food intake can complicate things further.

Shaking, sweating, confusion, dizziness, weakness, palpitations, irritability, or sudden hunger are not symptoms to push through.

If low blood sugar keeps happening, follow your diabetes care plan and talk with your clinician about whether your medication, food intake, or both need adjusting.

GI Symptoms Can Wear You Down

Nausea, vomiting, diarrhea, constipation, and early fullness can leave you tired for a very simple reason.

They make eating and drinking harder.

That can create a loop. You feel nauseated, so you eat less. You eat less, so protein and fluids drop. Then your energy drops too.

That isn’t a problem you solve by stacking more supplements on top. If digestive symptoms persist or become severe, talk with your prescriber.

Rapid Weight Loss Can Cost You Strength

One of the easiest mistakes to make on a GLP-1 is treating every pound lost as equally good.

It’s not.

GLP-1 weight loss can include lean tissue as well as body fat. If strength is disappearing along with weight, pay attention.

Stairs getting harder, workouts falling apart, slower recovery, or feeling physically weaker in everyday life are more useful signals than celebrating the scale alone.

Protein and resistance training help give your body a reason to keep muscle while weight comes down.

The goal isn’t just a smaller body, but a strong one at a healthier weight.

You May Be Missing Key Nutrients

If you cut total food intake in half, you have also cut the opportunities to get iron, B vitamins, zinc, calcium, magnesium, vitamin D, and other nutrients unless the food that remains is especially nutrient-dense.

The joint advisory specifically highlights iron, calcium, magnesium, zinc, and vitamins A, D, E, K, B1, B12, and C when calorie intake drops substantially.

This is where an animal-based diet becomes practical.

Beef, liver and other organs, eggs, dairy, seafood, fruit, and root vegetables give you far more nutritional return from the food you are still able to eat.

If appetite is smaller, the answer is better food in those smaller meals.

Fatigue can be a clue that something is missing, but symptoms alone cannot tell you which nutrient is low.

It May Have Nothing to Do With Ozempic

Don’t let the medication become the explanation for everything.

Anemia, thyroid disease, poor sleep, sleep apnea, infection, pregnancy, menopause, depression, anxiety, other medications, and other health conditions can all cause fatigue too.

When to check with your doctor: If your fatigue is persistent, worsening, or affecting your daily life, speak with your doctor. They can assess whether Ozempic, another medication, or an underlying health condition may be contributing. 

If your energy keeps getting worse despite eating enough, drinking enough, and protecting protein, get it checked.

Ozempic can change hunger. It should not make you stop listening to the rest of your body.

What Nutrients Support Normal Energy Production?

Support area	Why it matters	Best food-first options	Supplement angle
Protein	Supports muscle, strength, and physical function	Eggs, Greek yogurt, cottage cheese, fish, poultry, lean beef	Grass-Fed Whey when full meals are hard to finish
B vitamins	Help convert food into usable energy and support red blood cells	Meat, fish, eggs, dairy, liver	Pure American Liver or Beef Organs as food-derived support
Iron	Supports oxygen transport; low iron can feel like fatigue	Beef, liver, shellfish, poultry	Don’t supplement blindly; confirm need with bloodwork
B12 + folate	Support red blood cells and nervous system function	Meat, fish, eggs, dairy, liver	Food-derived organ supplements may help intake, but don’t replace deficiency treatment
Magnesium	Supports muscle, nerve, and energy metabolism	Avocados, bananas, milk, figs, mineral water	Supplement carefully; check with a clinician if you have kidney disease
Vitamin D	Supports muscle and overall health	Fatty fish, eggs, fortified dairy, sunlight where appropriate	Test first; avoid universal high-dose use
Carbohydrates	Help when total energy intake drops too low	Fruit, potatoes, sweet potatoes	Usually food-first; adjust around tolerance and diabetes care plan
Dietary fat	Adds calories in a small volume and supports fat-soluble nutrient absorption	Avocado, egg yolks, fatty fish, dairy	Firestarter may support fat-soluble nutrient intake, not stimulant energy

1. Protein Supports Strength and Physical Function

Protein gives your body the amino acids it needs to maintain muscle, strength, and everyday function.

When appetite drops, protein gets harder to fit in. That’s why it usually makes more sense to spread it across smaller meals and snacks instead of trying to catch up at dinner.

Beef, eggs, dairy, seafood, and poultry should do most of the work. Resistance training matters too when it’s appropriate for you.

Heart & Soil Grass-Fed Whey

Grass-Fed Whey provides 24 grams of complete protein and 2.5 grams of leucine per serving.

It’s useful when a full meal feels like too much. Mix it into a small shake, yogurt, or another food you’re already tolerating well.

The benefit is simple: it helps you keep protein intake up without adding much food volume. It won’t fix Ozempic fatigue on its own, and it doesn’t replace enough food, resistance training, or recovery.

2. B Vitamins Help Your Body Use the Food You Eat

B12, folate, riboflavin, thiamine, niacin, and B6 all play a role in energy metabolism, red blood cell formation, and nervous-system function.

More isn’t automatically better. If you’re already getting enough, taking huge doses won’t create extra energy.

This is one reason Heart & Soil puts so much emphasis on liver and other organs. They’re naturally rich in several B vitamins and fit into an Animal-Based diet as regular foods, not something you only reach for after a deficiency shows up.

A practical target is around 0.5–1 ounce of liver per day, along with several ounces of other organs. If fresh organs aren’t realistic every day, freeze-dried organ supplements make that easier to maintain.

Heart & Soil Pure American Liver

Pure American Liver is freeze-dried, grass-fed beef liver in capsule form.

It gives you a simple way to keep liver-derived vitamins and minerals in your routine when fresh liver isn’t on the table.

If you’re pregnant or trying to conceive, take supplemental vitamin A or iron, have an iron-storage disorder, liver or kidney disease, or already use other organ supplements, talk with your healthcare professional first.

3. Iron Supports Oxygen Transport

Iron helps your body make hemoglobin, which carries oxygen through the blood.

Low iron can show up as fatigue, weakness, shortness of breath, headaches, pale skin, or reduced exercise capacity. But those symptoms can come from plenty of other things too, so bloodwork matters more than guessing.

Liver and spleen naturally provide heme iron. If you already eat organs or take an organ supplement, count that before adding separate iron.

4. Vitamin B12 and Folate Support Blood and Nerve Health

B12 and folate both matter for red blood cell formation and normal nervous-system function.

Low levels can contribute to tiredness, weakness, numbness, tingling, balance problems, memory changes, or abnormal blood counts.

Pure American Liver and Beef Organs can help bring these nutrients into the diet, but they’re not a substitute for treating a diagnosed deficiency.

5. Magnesium Supports Muscle and Energy Metabolism

Magnesium is involved in muscle function, nerve function, energy metabolism, and bone health.

Animal-Based sources include avocado, bananas, milk, and figs.

You don’t automatically need a magnesium supplement just because you’re on a GLP-1. Supplemental magnesium can also cause diarrhea, and anyone with kidney disease should check with a clinician before adding it.

6. Vitamin D Supports Muscle and Overall Health

Vitamin D depends on more than diet.

Sun exposure, age, skin pigmentation, geography, absorption, and health history all affect vitamin D status.

Low vitamin D can show up alongside fatigue, but it’s rarely the whole story. If there’s a real concern, testing makes more sense than guessing at a high dose.

7. Carbohydrates Can Help When You’re Simply Not Eating Enough

If total food intake has dropped too far, carbohydrates from fruit, honey, and root vegetables can help bring energy intake back up.

Bananas, berries, oranges, dates, potatoes, and sweet potatoes all fit an Animal-Based approach and are easy to scale up or down depending on appetite and tolerance.

8. Dietary Fat Adds More Energy Without Much Volume

Fat gives you more calories per gram than protein or carbohydrate, which can help when appetite is small.

Egg yolks, full-fat dairy, fatty fish, avocado, bone marrow, and animal fats all fit here.

You don’t need to pile on huge amounts. Large, heavy meals can feel rough when digestion is already slower, so smaller portions usually make more sense.

Heart & Soil Firestarter

Firestarter is made from grass-fed and grass-finished suet.

It’s built around animal fat, metabolic support, and helping with fat-soluble nutrient intake. It isn’t a stimulant and it won’t fix GLP-1 fatigue on its own.

Its role is much simpler: adding nutrient-dense animal fat to the diet when that’s something you’re currently missing.

Heart & Soil Products for Nutritional Energy Support

Low energy sometimes means your nutritional base has simply gotten thinner as your appetite has gotten smaller.

This is where Heart & Soil’s Energy Stack comes in. It combines Pure American Liver, Beef Organs, and Firestarter in one bundle.

Pure American Liver delivers concentrated liver nutrition. Beef Organs brings in liver, heart, pancreas, spleen, and kidney for a broader range of organ-derived nutrients. Firestarter adds fat from grass-fed suet.

Together, the three products make it easier to keep nutrient-dense organs and animal fat in your routine when a GLP-1 has made meals smaller or harder to finish.

Other Heart & Soil products fit into the same framework.

• Beef Organs supports nutrient density.
• Gut & Digestion supports normal digestive function.
• Grass-Fed Colostrum supports the gut barrier and immune function.
• Grass-Fed Whey helps keep protein intake up.

Best Foods for Energy While Taking a GLP-1

When appetite is low, build smaller meals around the foods Heart & Soil prioritizes most. Meat, organs, eggs, dairy, seafood, fruit, and root vegetables give you a lot of nutrition without requiring a huge plate.

Think protein first, then add easy-to-digest carbohydrates from fruit or root vegetables.

Small animal-based meal	What it brings to the table
Ground beef with potatoes and fruit	Complete protein, B12, heme iron, zinc, potassium, and carbohydrate
Eggs with fruit and raw or cultured dairy	Protein, choline, B vitamins, calcium, and carbohydrate
Steak with roasted sweet potato	Complete protein, iron, zinc, creatine, potassium, and carbohydrate
Salmon with potatoes and fruit	Protein, omega-3 fats, selenium, potassium, and carbohydrate
Greek yogurt or kefir with berries and honey	Protein, calcium, carbohydrate, and an easy-to-finish smaller meal
Beef with a small serving of liver	Complete protein plus a concentrated source of vitamin A, B12, copper, iron, and folate

You do not need much variety on one plate. A few well-chosen foods can cover a lot of ground.

If solid food feels like too much, keep shakes simple and relatively small. A shake should help you get protein and nourishment in, not take up your entire appetite for the next several hours.

What to Eat When You Have No Energy or Appetite

When both appetite and energy are low, keep meals small but make the foods count. Heart & Soil’s Animal-Based approach centers meat and organs, then uses fruit, honey, raw dairy, and well-tolerated root vegetables to bring in additional energy.

Keep Animal Protein at the Center

Dr. Paul Saladino’s Animal-Based framework puts meat and organs at the center of the diet because they bring complete protein alongside highly concentrated nutrition.

When a big steak feels impossible, the serving does not have to be huge. Ground beef, burger patties, eggs, fish, or a smaller portion of steak or lamb can be easier to get through. A small amount of liver or other organs can add even more nutrition without adding much food volume.

Dr. Paul has publicly described meals built around grass-fed beef with a small serving of liver rather than trying to pack every meal with multiple foods.

Small appetite, small meal. Keep the animal protein.

Build Simple Animal-Based Combinations

A few combinations fit the way Dr. Paul actually eats and talks about food.

• Ground beef with ripe fruit
• Eggs with raw cheese and fruit
• Steak or lamb with orange juice
• Raw milk with honey alongside a smaller meat meal
• Beef with a small serving of liver and fruit
• Fish with potatoes, sweet potato, cassava, or another root vegetable you tolerate well

Dr. Paul’s own diet has evolved here too. In 2026, he has talked about experimenting with root starches such as yuca while keeping the same foundation of animal protein, organs, fats, and carbohydrates suited to his activity.

Daily Habits That May Support Energy

Energy is shaped by more than what you eat. Heart & Soil looks at the whole set of signals your body gets every day, including food, movement, sunlight, and sleep.

• Move your body every day. Walking, lifting, playing outside, and other regular movement all count. Heart & Soil sees exercise as something your body is built to do, not something a supplement can imitate. 
• Get outside in the morning. Morning sunlight gives your body a strong daytime signal and helps set up the rhythm that supports better sleep later. 
• Take sleep seriously. A good morning starts the night before. Dim the screens and bright artificial light later in the day, give yourself enough time to sleep, and keep a regular rhythm when you can.
• Do not confuse getting lighter with getting healthier. A leaner physique is not automatically an improvement if strength, hormones, recovery, or how you feel start moving in the wrong direction.
• Use real carbohydrates when you need more fuel. Fruit and honey are regular parts of Heart & Soil’s Animal-Based approach. They bring carbohydrate in the context of whole foods rather than ultra-processed snacks.
• Return to the basics instead of trying to compensate for every imperfect day. Go back to healthy food, sunlight, movement, and sleep and let consistency do its work.

What Not to Take for Ozempic Fatigue Without Guidance

If you’re tired on Ozempic, don’t start throwing supplements at the problem before you know what’s causing it.

Be especially careful with:

• Iron unless bloodwork or your clinician gives you a reason to take it
• High-dose B12 injections from unregulated sources
• Very high-dose vitamin D
• Potassium supplements without medical guidance
• Stimulant-heavy fat burners or excessive caffeine
• Several organ supplements or multivitamins stacked together
• Herbs marketed to lower blood sugar
• Anything claiming to mimic a GLP-1, replace meals, or fix “adrenal fatigue”

A stimulant may make you feel more awake for a few hours, but it doesn’t fix too little food, poor sleep, dehydration, low blood sugar, or an underlying medical issue.

When Ozempic Fatigue Requires Medical Attention

Some fatigue deserves more than a nutrition tweak.

Contact your prescriber if it’s severe, keeps getting worse, interferes with normal daily activity, or started soon after a dose increase.

Also get medical advice if fatigue comes with:

• Vomiting, diarrhea, severe abdominal pain, or unusually rapid weight loss
• Numbness, tingling, or balance problems
• Shortness of breath or heart palpitations
• Dark urine, reduced urination, dizziness, or other signs of dehydration
• Symptoms of low blood sugar
• Unusual bruising or significant hair loss

Seek urgent care for fainting, confusion, severe weakness, chest pain, difficulty breathing, severe hypoglycemia symptoms, or if you can’t keep fluids down.

A Simple Low-Energy Checklist

Before assuming you need another supplement, ask yourself:

• Have I eaten enough today?
• Did I get protein at each meal?
• Have I had any fruit or root vegetables?
• Am I drinking enough?
• Have I been vomiting or dealing with diarrhea?
• Has my strength or exercise performance dropped?
• Am I sleeping enough?
• Did this start after my dose changed?
• Do I take insulin or another medication that can lower blood sugar?
• Am I stacking several supplements with the same nutrients?
• Has this gone on long enough that I should talk to my prescriber?

Final Takeaway

Heart & Soil cares about the body you are building while the scale is moving down. Muscle, strength, energy, recovery, and long-term health still count.

Pushing one outcome harder can come with tradeoffs somewhere else. That’s the part worth reading between the lines.

Heart & Soil’s view is that there is no biological free lunch. The habits that support health over years still matter while you are taking a GLP-1.

Real food. Enough protein. Organs. Fruit and other well-tolerated carbohydrates. Movement. Sunlight. Sleep.

Those are the things we repeatedly come back to when talking about long-term health rather than short-term shortcuts.

If smaller meals have made organ foods or protein harder to keep in the routine, the Energy Stack and Grass-Fed Whey are practical ways to bring those pieces back in.

Use the medication if it helps. But keep building the kind of body you want to have when the weight is gone.

FAQ

Want more on this? Join the Radical Health Newsletter for more straight-talk nutrition guidance, or reach out to our team if you have questions about which products fit your routine.