Foods to Avoid on Prednisone That Make Side Effects Worse

If you’re on prednisone right now and nobody has told you which foods make the side effects worse—the weight gain, the blood pressure spikes, the blood sugar spikes, the inflammation—you need to read this before your next meal.

I’m Dr. Megan, the Prednisone Pharmacist. I’m a board-certified doctor of pharmacy and third-generation pharmacist, and I’ve personally taken high doses of prednisone myself for a long time.

I know exactly what it does to your body—from the textbooks and from my own kitchen table.

Today, I’m going to walk you through the foods and drinks you need to avoid on prednisone. I’m going to explain why each one is a problem, because understanding the reason is what actually makes the change stick.

And I’ll answer the specific food questions I get asked all the time:

• Can I drink coffee?
• Can I eat eggs, ice cream, yogurt, milk, bananas?

Let’s start with why food even matters while on prednisone—because once you understand this one mechanism, the whole list makes so much more sense.

Watch now!

Why Food Matters on Prednisone: The One Mechanism You Need to Know

Here’s what prednisone is actually doing in your body.

Prednisone mimics a hormone your body already makes naturally called cortisol.

Cortisol is your emergency response team. It’s the hormone your body calls on in a real crisis—a famine, a war, running from a tiger.

And cortisol spikes your blood sugar so you can get away and survive that disaster. You have the energy to fight or flee.

But here’s the problem: prednisone keeps that emergency signal switched on all the time.

Your body thinks it’s in a famine. That’s the message we’re giving it when we take prednisone.

So it:

• Hoards calories
• Raises blood sugar
• Turns everything into fat, especially around your belly and face (hello, moon face)

And then your cravings go haywire.

You’re not being weak. You’re being biochemically driven to eat high-calorie, high-sugar foods.

Prednisone is pulling the strings.

So when I tell you to avoid certain foods, I’m not lecturing you. I’m telling you: these foods pour gasoline on a fire that prednisone already lit.

When researchers did a study of people who took just one dose of a steroid, they found that it changed more than half of the metabolic markers they could test in the blood.

This is not under your control. It’s a thing that prednisone does.

The Foods to Avoid on Prednisone

#1: Sugar (In All Its Hidden Forms)

The number one thing to cut back on is sugar—and I mean all the forms it hides in.

That’s because prednisone is called a glucocorticoid. Gluco meaning glucose, meaning sugar.

It’s literally named after this side effect.

Here’s a simple rule: If your great-great-great-grandmother wouldn’t recognize it, it’s not a good choice while on prednisone.

White sugar and white flour? She wouldn’t recognize those things. They’re processed, stripped of fiber, and they turn to glucose almost instantly in your bloodstream.

On prednisone, your body already can’t handle sugar well. These foods make it so much worse.

The sugar offenders list:

• Baked goods: white bread, rolls, bagels, donuts
• Candy
• Soda pop and any carbonated beverages (including diet)
• Syrup and jelly
• Anything made with high fructose corn syrup
• Chips and crackers
• Instant box dinners
• Cereal
• Pasta

One thing that might surprise you: Anything labeled “fat-free.”

When food manufacturers removed the fat, they replaced it with sugar.

Fat-free is not a health food. It’s a blood sugar trap.

#2: Sodium (Salt)

Prednisone signals to your kidneys to hold onto sodium. When you eat more sodium on top of that, your body holds onto fluid because water follows the salt.

That’s where a lot of the puffiness and water retention come from—not just from the drug itself, but from the salt you’re eating.

High sodium offenders:

• Anything preserved long term (if it lasts a long time on a shelf, it probably has salt added)
• Sandwich meats and cured meats
• Pizza
• Canned soups
• Instant anything
• Frozen meals

Frozen meals are especially sneaky. Companies add salt to replace the flavor that was lost in the freezing process.

And yes, this all applies to other steroids too—methylprednisolone, hydrocortisone, dexamethasone. They’re all the same drug class. They’re all glucocorticoids, and they all have the same sodium retention mechanism and the same metabolic disruption.

#3: Caffeine

I know this one is hard to hear, especially if you’re exhausted from prednisone insomnia.

But caffeine—particularly from coffee and caffeinated sodas—is linked to increased bone loss.

Prednisone is already the number one drug that causes osteoporosis—bone loss that can be permanent. We don’t want to add any more risk.

I’m not saying you can never have coffee. But I am saying: if you’re on prednisone long term, minimizing caffeine is worth it.

But if you’re tapering and you’re exhausted and caffeine is the only thing keeping you functional—I get it. Do what you need to do. But when you have a choice, choose less caffeine.

#4: Alcohol

Alcohol hits you twice on prednisone.

Strike one: Many alcoholic beverages, including beer, are high in sugar. Beer contains maltose, which drives the same blood sugar and fat storage problems we already talked about.

Strike two: Like caffeine, alcohol is linked to decreased bone density.

Two strikes.

Free Resource: 25+ Things to Avoid While Taking Prednisone

I put together a free guide called the 25+ Things to Avoid While Taking Prednisone.

It covers food, drink, medications, supplements, shots—anything that can make your side effects worse—all in one printable list that you can keep on your fridge or bring to your next appointment to talk with your doctor about.

Grab your free guide below ↓

Receive a free printable 25+ Things to Avoid While Taking Prednisone to help you protect yourself from avoidable side effects. This does not substitute your doctor’s medical advice or prescription.

Answering Your Specific Food Questions

Can I eat bananas on prednisone?

Yes—and actually, bananas are a great food choice while on prednisone.

They’re high in potassium, which matters because prednisone is actually stealing potassium from your body while it’s retaining the sodium. Bananas also have fiber, they’re filling, and they’re a real food.

Keep bananas in rotation.

Can I eat eggs on prednisone?

Yes. Eggs are genuinely one of the best foods you can eat while on prednisone.

High protein, good fats, nutrient-dense. Just go easy on added salt when you’re cooking them.

Can I drink coffee on prednisone?

As I mentioned earlier, minimize it if you can for the bone loss reason above. But if you’re in the thick of tapering and exhausted, do what you need to do and reduce when possible.

Can I eat yogurt on prednisone?

Yes, but choose the right yogurt.

Choose the most minimally processed yogurt you can find. Ideally, the ingredient list should just be milk and live active cultures. Avoid the sugar-loaded yogurts.

Plain, full-fat yogurt is excellent. It gives you calcium, protein, and probiotics.

Can I drink milk on prednisone?

Yes, milk is fine in moderation.

The calcium content is definitely a bonus since prednisone depletes calcium the most. Just don’t make milk your only beverage—be sure to drink water as well.

Can I eat ice cream on prednisone?

I wish I had better news here.

Ice cream is calorie-dense, sugar-dense, and highly processed—everything we’re trying to minimize. It’s the kind of food that prednisone makes you crave intensely, which is exactly why it’s risky.

Save it for rare occasions.

Can I eat chocolate on prednisone?

It depends.

Most commercial chocolate is highly processed and full of refined sugar, which is not ideal.

But if you can find a high-quality dark chocolate with minimal added sugar and a short ingredient list, a small amount is possible. It’s high in a few important antioxidants and magnesium.

But chocolate is often a gateway to other cravings while you’re on prednisone. So be honest with yourself about whether one square ever stays one square.

Wait—Fat Is Not Your Enemy on Prednisone

I don’t want to leave you feeling like everything is off limits.

Here’s something that might surprise you: Fat is not your enemy on prednisone.

I know. We’ve been told for decades that dietary fat makes you fat.

But it doesn’t. Sugar does.

And prednisone makes you even more susceptible to the effects of sugar.

But healthy fats from eggs, olive oil, avocado, and nuts? Those are your friends right now.

They don’t spike blood sugar. They don’t feed the fat storage cycle that prednisone already has going.

Your Prednisone Diet in One Sentence

Stay out of the middle aisles of the grocery store. Shop the perimeter. Stick to real foods that your great-great-great-grandmother would recognize.

That’s it.

What Your Great-Great-Great-Grandmother Would Recognize

Here’s what actually works:

Shop the perimeter:

• Real chicken (not nuggets)
• Real potatoes (not chips)
• Actual sweet potatoes
• Fresh asparagus, roasted with olive oil and garlic
• Baked or steamed vegetables
• Grilled meat
• Whole fruit (especially bananas for potassium)

Smart snacking:

• Dried apricots (fantastic nutrient source)
• Almonds (handful with plenty of water)
• Whole fruit

Meal building:

• Brown rice
• Fresh vegetables from the farmer’s market or produce aisle
• In-season produce (like asparagus in spring—roast with olive oil/garlic + brown rice + chicken)
• Batch-cook potatoes and sweet potatoes for the week (5 minutes effort, 30 seconds daily microwave prep)

Tools that help:

• Instant Pot for easy batch cooking
• High-quality blender (like Blendtec) for whole foods

Make treats special occasions only. Remove the high-sugar/high-salt temptations from your house:

• Goldfish crackers
• Instant dinners (often 42% sodium)
• Cereal boxes
• Anything processed you’ll mindlessly eat

The goal is simplicity: Give yourself grace, remove temptations, and eat whole foods close to their source.

The Nutrients That Diet Alone Can’t Replace

Now that you know what to avoid—and what whole foods to eat instead—the next question is: what about the nutrients you’re losing?

Even eating perfectly on prednisone, there are specific nutrients that no amount of diet change can fully replace.

Prednisone depletes calcium, magnesium, chromium, B vitamins, vitamin C, potassium, zinc, vitamin D, and more—faster than food can replace them while you’re on this medication.

That’s exactly why I created Nutranize Zone—to fill the nutritional gaps that even a perfect prednisone diet can’t address on its own.

Morning bottle:

• Chromium (200 mcg) – The exact dose shown to reverse steroid-induced diabetes
• Calcium (500 mg) – First daily dose for bone protection
• B vitamins, vitamin C, zinc – For energy and immune support
• Berberine and cinnamon – For blood sugar stability

Bedtime bottle:

• Calcium (500 mg) – Second dose (your body absorbs ~500mg at a time)
• Magnesium glycinate – For sleep and muscle function
• Melatonin – To restore what prednisone suppresses
• Vitamin K2 MK-7 – To direct calcium to bones, not arteries

Learn more about Nutranize Zone →

The Bottom Line: Foods to Avoid on Prednisone

Avoid or minimize:

• Sugar (white bread, bagels, candy, soda, cereal, pasta, fat-free anything)
• Sodium (canned soups, deli meats, frozen meals, pizza, instant anything)
• Caffeine (bone loss risk)
• Alcohol (blood sugar + bone loss—two strikes)
• Grapefruit and grapefruit juice (drug interaction—increases steroid exposure in some individuals)

Yes foods—Real whole foods:

• Bananas (potassium-rich)
• Eggs (protein, healthy fats)
• Plain full-fat yogurt (calcium, protein, probiotics)
• Milk in moderation (calcium)
• Healthy fats (olive oil, avocado, nuts)
• Real chicken and meat (grilled, not processed)
• Fresh vegetables (baked, steamed, roasted)
• Sweet potatoes and regular potatoes (batch-cooked)
• Brown rice
• Dried apricots and whole fruit
• Farmer’s market produce, in-season selections

Proceed with caution:

• Coffee (minimize for bone health)
• Dark chocolate (small amounts, high quality only)
• Ice cream (rare occasions only)

The one-sentence prednisone diet: Eat real food your great-great-great-grandmother would recognize—whole foods close to their source, prepared simply, with temptations removed from your kitchen.

And when diet isn’t enough—because on prednisone, it often isn’t—Nutranize Zone fills the gaps.

Download the free 25+ Things to Avoid While Taking Prednisone guide ↓

Reference:
Bordag, N., Klie, S., Jürchott, K. et al. Glucocorticoid (dexamethasone)-induced metabolome changes in healthy males suggest prediction of response and side effects. Sci Rep 5, 15954 (2015). https://doi.org/10.1038/srep15954