10 Nutrients You Need While on Prednisone

You started taking prednisone, and then things started going wrong.

Weight creeping up. Bones aching. Blood sugars spiking. Skin thinning. Sleep disappearing. Mood all over the place.

Maybe your doctor said, “Those are just the side effects. They’re the price of controlling your condition.”

But here’s what they probably didn’t tell you: prednisone isn’t just suppressing your immune system. It is actively depleting specific nutrients from your body, nutrients your bones, muscles, immune cells, and metabolism depend on to function.

The side effects aren’t random. They are your body telling you exactly what it’s missing.

And some of them can be significantly reduced just by knowing what to eat.

I’m Dr. Megan, a board-certified pharmacist and third-generation pharmacist. I’ve taken high-dose prednisone myself. I know what this feels like from the inside. And in this post, I’m going to walk you through the 10 nutrients prednisone depletes, what your body needs each one for, and the best foods to restore them.

Watch now!

TL;DR: Quick Summary

Prednisone is a corticosteroid that depletes essential nutrients by altering how your kidneys, gut, and bones process vitamins and minerals. Over time, those depletions drive many of the side effects people experience, including bone loss, weight gain, blood sugar problems, muscle cramps, and slow wound healing. The 10 most depleted nutrients are calcium, vitamin D, chromium, magnesium, zinc, potassium, folate, vitamin A, vitamin C, and selenium. You can restore them through targeted food choices, a free printable cheat sheet (linked below), or a supplement designed specifically for people on prednisone called Nutranize Zone.

Why Prednisone Causes Nutrient Depletion

Before we get to the list, I want you to understand the why, because once you understand this, everything else clicks into place.

Prednisone is a corticosteroid. Its job is to calm a runaway immune system, and it’s remarkably good at that. It completely saved my life.

But in order to do its job, it essentially borrows from your body’s nutrient reserves. It shifts how your kidneys filter minerals. It changes how your gut absorbs vitamins. It accelerates how fast certain nutrients get used up.

And it doesn’t tell you it’s doing this. There’s no receipt. One day you just feel worse, and you don’t know why.

That’s what we’re fixing today.

10 Nutrients Prednisone Depletes and the Foods That Restore Them

1. Calcium

Calcium is the most commonly depleted nutrient in people taking prednisone, so consistently depleted that rheumatologists routinely prescribe calcium supplements to anyone on long-term therapy. That’s how serious this is.

Here’s the mechanism: prednisone blocks calcium absorption in the gut, signals your kidneys to excrete more calcium through urine, and tells your bones to release calcium into the bloodstream. The result? Bone density drops. Bone loss from prednisone can be irreversible. It’s the most common permanent side effect of long-term prednisone use. We can slow it. We cannot always reverse it once it’s happened.

Calcium is also essential for muscle contractions, nerve transmission, blood clotting, and heart function. It does far more than just build bones.

Food sources of calcium: dairy foods (milk, yogurt, cheese), sardines, salmon, kale, broccoli, turnip greens, and fortified orange juice.

One critical rule:

Never take calcium alone. Keep reading, because its partner nutrient is just as important, and most people make a critical mistake here.

2. Vitamin D

Vitamin D is calcium’s partner, and you cannot separate them.

Here’s why: calcium is absorbed in the gut with the help of vitamin D. Without sufficient vitamin D, the calcium you eat or supplement doesn’t go where it’s supposed to. Instead of depositing into your bone matrix, it can deposit in your arteries. That is the opposite of what we want.

Vitamin D also plays a critical role in immune regulation, mood stability, and anti-inflammatory processes. Prednisone can interfere with vitamin D metabolism directly, compounding the problem.

The best source is sunlight exposure, but that’s not always practical, especially if you’re dealing with fatigue or skin sensitivity on prednisone. Dietary sources include salmon, egg yolks, and mushrooms.

If you are on long-term prednisone, talk to your doctor about testing your vitamin D level. Most people are low even before factoring in what prednisone does to vitamin D metabolism.

Food sources of vitamin D: salmon, egg yolks, mushrooms.

3. Chromium

Here’s the one most people have never heard of in this context, and one of the most important for understanding why prednisone makes managing weight and blood sugar so difficult.

Chromium is a trace mineral your body needs in small amounts, but prednisone depletes it at a much higher rate than normal. The consequences show up as two of the most frustrating prednisone side effects: weight gain and rising blood sugar.

Chromium works alongside insulin to regulate blood glucose. It helps insulin do its job more efficiently. When prednisone depletes your chromium, insulin becomes less effective. Blood sugars become harder to control. Cravings intensify. Metabolism slows.

This is a significant reason why people feel like they’re doing everything right with their diet and still struggling with weight on prednisone. Low chromium is often part of that picture.

Food sources of chromium: broccoli (actually one of the richest chromium sources available), grape juice, mashed potatoes, and garlic.

4. Magnesium

Magnesium is involved in over 300 enzyme systems in your body. That’s not a typo. Three hundred.

It supports muscle contraction, bone density, blood sugar regulation, sleep quality, and nerve function. If you’re on prednisone and dealing with muscle cramps, poor sleep, or worsening blood sugar, low magnesium may be part of that picture.

Prednisone can interfere with both the absorption and utilization of magnesium, potentially driving down levels over time.

Food sources of magnesium: almonds, spinach, cashews, peanuts, avocado, black beans, brown rice, and potato skins. Don’t leave the skin on the plate. The skin of a baked potato is an excellent source of both magnesium and potassium.

5. Zinc

Most people know zinc for immune support and fighting colds. That’s exactly why it matters so much when you’re taking prednisone.

Prednisone is an immunosuppressant. One of the ways it dials down your immune system is by depleting zinc. But you don’t want your immune function so suppressed that you can’t fight off a normal infection. Zinc is part of keeping that balance.

Zinc also plays a critical role in wound healing. One of the subtle but real side effects of prednisone is that cuts and bruises take longer to close. Zinc deficiency contributes to that. Beyond immune function, zinc supports DNA synthesis, normal growth, and over 300 enzymatic reactions throughout the body.

Food sources of zinc: oysters (the single richest source), beef chuck roast, crab, baked beans, and pumpkin seeds.

6. Potassium

This one explains a lot of the swelling and water retention people experience on prednisone.

Here’s the mechanism: your kidneys are designed to keep potassium and sodium in careful balance. Prednisone causes your kidneys to excrete too much potassium. When potassium drops, sodium rises, and sodium holds onto water. That’s where the swollen face, swollen knees, and water weight come from.

Potassium is also essential for nerve signaling and muscle contractions. If you’re experiencing leg cramps, potassium or magnesium deficiency is often the culprit.

One important exception:

If you have kidney disease, talk to your doctor before increasing potassium intake. This guidance is specifically for people with otherwise healthy kidneys.

Food sources of potassium: dried apricots, lentils, squash, raisins, baked potatoes with the skin, kidney beans, bananas, spinach, and salmon. Potassium is abundant in vegetables, which is another reason that eating your vegetables is specifically important on prednisone. It’s not just general wellness advice. It’s targeted restoration.

7. Folate (Folic Acid)

Your body uses folate for cell division and renewal. Your cells are constantly dying and being replaced, and folate is what allows that process to happen correctly.

Without enough folate, cell recovery slows. When you’re already dealing with prednisone’s effects on tissue, skin, and the gut lining, that delay matters. Folate also supports red blood cell production, serotonin synthesis, and is essential during pregnancy for preventing neural tube defects like spina bifida.

Prednisone can interfere with the absorption and utilization of folate, which over time can impair cell renewal and increase the risk of anemia.

Food sources of folate: beef liver, spinach, black-eyed peas, asparagus, and Brussels sprouts.

8. Vitamin A

Vitamin A supports immune function, healthy vision, skin integrity, and normal growth and development of bones and teeth.

When prednisone depletes vitamin A, the consequences can include impaired night vision, increased susceptibility to respiratory and gastrointestinal infections, and changes to skin texture and condition. There are also multiple eye-related side effects associated with prednisone, with cataracts and glaucoma being the most serious. Vitamin A won’t prevent those, but supporting overall eye health still matters.

Food sources of vitamin A: sweet potatoes, carrots, beef liver, spinach, pumpkin, and cantaloupe.

9. Vitamin C

Vitamin C supports your immune system, which is already under pressure from prednisone, but its most important role in this context may be its contribution to collagen production.

Collagen is the structural protein in your skin, your bones, and your healing tissue. Prednisone can cause skin thinning and stretch marks, and those changes can be permanent. Adequate vitamin C supports the collagen matrix your skin and connective tissue depend on. It also enhances iron absorption and is essential for blood vessel, cartilage, and muscle formation.

Prednisone increases the excretion of vitamin C through urine and reduces its absorption from food, making consistent dietary intake especially important.

Food sources of vitamin C: red and green peppers, oranges, grapefruit, kiwi, and broccoli, which keeps appearing on this list because it genuinely earns its place as one of the most valuable foods you can eat on prednisone.

10. Selenium

Selenium is the nutrient where the evidence is most variable. It appears to be depleted by prednisone in some people but not all.

What’s clear is that selenium plays important roles in thyroid hormone metabolism, antioxidant defense, and immune function. Given the complex interactions between prednisone and thyroid function, it’s worth including selenium-rich foods in your regular rotation.

The most efficient dietary source is Brazil nuts. Just two or three per day provides your full daily dose. Other good sources round out an anti-inflammatory eating pattern.

Food sources of selenium: Brazil nuts, tuna, halibut, sardines, and ham.

Get Your Free Nutrients Cheat Sheet

If keeping track of all of this feels overwhelming, you’re not alone. I created a free one-page printable that lists all 10+ nutrients prednisone depletes alongside the best food sources for each one. Print it out, hang it in your pantry, and follow along every day.

Receiving this printable does not substitute your doctor’s medical advice or prescription.

Food Is the Best Medicine, But Sometimes You Need More Support

As Hippocrates said, “Let food be thy medicine.” But when you’re exhausted, inflamed, and struggling to get through the day, shopping for, preparing, and consistently eating all of the foods above can feel like a second full-time job.

After taking high-dose prednisone myself and spending years researching drug-induced nutrient depletion, I created Nutranize Zone to fill the gap that food alone can’t always close.

Nutranize Zone is the first and only supplement designed specifically for people taking prednisone. It’s not a generic multivitamin. Every ingredient was chosen because of the specific way prednisone depletes it, and the formula is split across two bottles, one for morning and one for bedtime, to optimize how your body absorbs each nutrient at the right time of day.

It doesn’t replace eating well. It backs it up, so that even on the days when you can barely cook or shop, you’re still replenishing what prednisone is taking from your body.

If you want to learn more, visit nutranize.com. But start with the free printable first. Food comes first, and that cheat sheet will help you take action today.

Frequently Asked Questions

What vitamins does prednisone deplete?

Prednisone depletes calcium, vitamin D, chromium, magnesium, zinc, potassium, folate, vitamin A, vitamin C, and selenium. Each of these plays a distinct role in your bones, immune system, metabolism, skin, and cellular repair. The depletion happens through several mechanisms: altered kidney filtration, reduced gut absorption, and accelerated nutrient use as your body responds to corticosteroid activity.

Does prednisone deplete potassium?

Yes. Prednisone causes your kidneys to excrete excess potassium, which disrupts the sodium-potassium balance in your body. When potassium drops and sodium rises, your body retains water. This is a direct contributor to swelling, puffiness, and weight gain on prednisone. Eating potassium-rich foods like bananas, spinach, lentils, and baked potatoes can help restore what is lost. If you have kidney disease, consult your doctor before increasing potassium.

Should I take calcium and vitamin D together on prednisone?

Yes, always. Vitamin D is what allows calcium to be absorbed in your gut and directed into your bones. Without vitamin D, supplemental calcium may not end up where you want it. In fact, calcium taken without vitamin D can potentially deposit in arteries rather than bones. Rheumatologists routinely prescribe both nutrients together for patients on long-term prednisone, and for good reason.

Why does prednisone cause weight gain even when I’m eating carefully?

Part of the answer is chromium depletion. Chromium helps insulin regulate blood sugar efficiently. When prednisone depletes chromium, insulin becomes less effective, cravings intensify, blood sugars are harder to stabilize, and metabolism slows. That’s why some people feel like they’re doing everything right and still can’t manage their weight on prednisone. Chromium-rich foods like broccoli, garlic, and mashed potatoes can help address this, though the effect is gradual.

Can I get all these nutrients from food alone?

For many people, yes, eating a varied diet rich in vegetables, lean proteins, dairy, and whole grains will cover most of these. The challenge is consistency, especially when prednisone is causing fatigue, appetite changes, and other disruptions that make cooking and eating well harder. For those who struggle to eat consistently, a supplement designed specifically for prednisone users, like Nutranize Zone, can help fill the gaps. Food comes first, but supplementation can serve as a reliable backup.

How long does nutrient depletion from prednisone take to develop?

It varies by nutrient and dose. Bone loss can begin within the first three to six months of long-term corticosteroid use. Other deficiencies, like potassium or vitamin C, may develop more gradually. This is why it’s important to start supporting your nutrition from the beginning of treatment rather than waiting for symptoms to appear.

Is Nutranize Zone safe to take with prednisone?

Nutranize Zone was specifically designed for people taking prednisone and was formulated with drug-nutrient compatibility in mind. That said, always consult your doctor or pharmacist before starting any new supplement, particularly if you are managing other conditions or taking additional medications.

Disclaimer: This content is for educational purposes only and does not replace the advice of your healthcare provider. Always consult your doctor before making changes to your medications, supplements, or diet. Nutranize Zone does not diagnose, treat, cure, or prevent any disease.

References:
Watanabe C, Kim C-Y, Satoh H. Tissue-specific modification of selenium concentration by acute and chronic dexamethasone administration in mice. British Journal of Nutrition. 1997;78(3):501-508. doi:10.1079/BJN19970167
Humphrey MB, Russell L, Danila MI, Fink HA, Guyatt G, Cannon M, Caplan L, Gore S, Grossman J, Hansen KE, Lane NE, Ma NS, Magrey M, McAlindon T, Robinson AB, Saha S, Womack C, Abdulhadi B, Charles JF, Cheah JTL, Chou S, Goyal I, Haseltine K, Jackson L, Mirza R, Moledina I, Punni E, Rinden T, Turgunbaev M, Wysham K, Turner AS, Uhl S. 2022 American College of Rheumatology Guideline for the Prevention and Treatment of Glucocorticoid-Induced Osteoporosis. Arthritis Care Res (Hoboken). 2023 Dec;75(12):2405-2419. doi: 10.1002/acr.25240. Epub 2023 Oct 26. PMID: 37884467.