Jardiance (empagliflozin) works by flushing excess glucose out through your urine, and that mechanism has real consequences for what belongs on your plate. The drug doesn’t demand a special diet, but it does shift a few nutritional priorities: you need steady hydration, enough carbohydrates to avoid a dangerous metabolic state, and mineral-rich foods to compensate for what the kidneys handle differently. Getting these basics right can make a meaningful difference in how well the medication works for you and how you feel day to day.
You Can Take It With or Without Food
One of the simpler things about Jardiance is that meals don’t change how well the drug works. A pharmacokinetic study in healthy volunteers found that taking empagliflozin with food had no clinically relevant effect on the drug’s overall absorption, even though peak blood levels dipped slightly when taken alongside a meal.1PubMed. Effect of food on the pharmacokinetics of empagliflozin, a sodium glucose cotransporter 2 (SGLT2) inhibitor, and assessment of dose proportionality in healthy volunteers A separate analysis confirmed that the small reduction in peak concentration was due to food slowing the rate of absorption rather than reducing the total amount absorbed, and concluded that empagliflozin can be taken independently of food.2PubMed Central. Pharmacokinetic and Pharmacodynamic Profile of Empagliflozin, a Sodium Glucose Co-Transporter 2 Inhibitor So if you prefer taking it with breakfast, go ahead. If you take it on an empty stomach, that works too. The more important dietary questions are about what you eat throughout the day, not what’s in your stomach at the moment you swallow the pill.
Why Your Diet Matters More on This Drug
Jardiance blocks a transporter in your kidneys that normally reclaims glucose from the fluid being filtered into urine. With that transporter partially shut down, a significant amount of glucose spills into the urine instead of returning to your bloodstream.3PubMed Central. Empagliflozin and Kinetics of Renal Glucose Transport in Healthy Individuals and Individuals With Type 2 Diabetes Research in heart failure patients showed that the fraction of filtered glucose appearing in urine jumped to over 20% within the first day of treatment.4PubMed Central. Effects of empagliflozin on renal sodium and glucose handling in patients with acute heart failure That lost glucose represents calories your body no longer gets to use. It also pulls extra water into the urine, changes how certain minerals are handled, and can shift your appetite in surprising ways. Each of these effects points toward specific foods and habits that help, and a few that can cause real trouble.
The Diet You Should Avoid Entirely
If there is one hard dietary rule while taking Jardiance, it is this: do not follow a ketogenic or very low-carbohydrate diet. The combination has been linked to a dangerous condition called euglycemic diabetic ketoacidosis, where acid levels in the blood spike even though blood sugar stays normal or only mildly elevated. Because glucose readings look fine, the problem can be missed until someone is seriously ill.
A case series reviewing multiple hospitalizations found that the pairing of a ketogenic diet with an SGLT2 inhibitor like Jardiance repeatedly triggered this condition, and the authors concluded that patients on these drugs should be advised to avoid a ketogenic diet altogether.5AACE Clinical Case Reports. Euglycemic Diabetic Ketoacidosis Caused by SGLT2 Inhibitors and a Ketogenic Diet: A Case Series and Review of Literature Another case report described a 42-year-old man who developed this condition just three days after starting empagliflozin while on a strict low-carb diet.6Journal of Association of Clinical Endocrinologist and Diabetologist of Bangladesh. The deadly combination of a keto diet and SGLT-2 inhibitors: A case of euglycemic ketoacidosis Additional reports have highlighted that even without being on a formal keto diet, severely cutting calories or carbs while taking SGLT2 inhibitors raises the risk.7Journal of the Endocrine Society. A Case Report of Euglycemic Diabetic Ketoacidosis in the Setting of Keto Diet and SGLT-2 Inhibitors
The mechanism is straightforward: Jardiance is already disposing of glucose through the urine. If you also starve your body of carbohydrate from food, your cells have to burn fat almost exclusively for energy. That fat-burning produces ketone bodies, and without enough insulin signaling to keep them in check, ketones accumulate to dangerous levels. The takeaway is practical: you need a reliable source of carbohydrates in your diet every day. This doesn’t mean loading up on white bread and pastries. It means including whole grains, legumes, fruit, starchy vegetables, or similar foods at meals so your body isn’t forced into an extreme metabolic shift.
How Much Water You Actually Need
Because Jardiance sends extra glucose into the urine, it pulls water along with it through osmotic effects. In most people, the body’s own water-conservation mechanisms kick in and compensate. A study in heart failure patients found that the body’s adaptive water retention effectively offset the expected increase in urine volume from the drug, preventing a glucose-driven rise of roughly 750 mL per day that would otherwise have occurred.8PubMed. Water Conservation Overrides Osmotic Diuresis During SGLT2 Inhibition in Patients With Heart Failure So in healthy, well-nourished people, Jardiance doesn’t turn you into a dehydrated mess.
The risk rises when other factors compound the fluid loss. A case report described a 68-year-old patient who developed severe dehydration and cardiac arrest after starting empagliflozin, in part because poor appetite had reduced food and fluid intake at the same time.9PubMed Central. Short-Term Treatment with Empagliflozin Resulted in Dehydration and Cardiac Arrest in an Elderly Patient with Specific Complications: A Case Report and Literature Review That’s an extreme case, but the lesson applies broadly: if you’re eating less than usual, sick with a stomach bug, exercising heavily in heat, or drinking alcohol (which is itself a diuretic), you’re stacking fluid losses on top of what Jardiance already causes. Keep water or unsweetened beverages accessible throughout the day, and pay attention to early signs of dehydration like dark urine, dry mouth, or feeling lightheaded when you stand up.
One note for people with heart failure: fluid restriction used to be standard advice for that condition, but a recent randomized trial of over 500 heart failure patients found no clear benefit from restricting fluids to 1,500 mL per day. In fact, the restricted group reported more thirst distress with no improvement in quality of life or safety.10PubMed. Liberal fluid intake versus fluid restriction in chronic heart failure: a randomized clinical trial If your doctor has put you on a fluid restriction, that conversation is worth revisiting, especially since Jardiance already increases fluid loss.
Your Brain Will Push You Toward Sugar
Here’s something most people don’t expect: Jardiance can make you hungrier, and the cravings tend to skew toward carbohydrates and sweets. Research has shown that SGLT2 inhibitors cause substantially less weight loss than you’d predict from the calories they flush away, and a big reason is that the body fights back. When glucose keeps leaving through the urine, your brain registers a persistent energy deficit and ramps up appetite to compensate.11PubMed. Increased sugar intake as a form of compensatory hyperphagia in patients with type 2 diabetes under dapagliflozin treatment
Brain imaging research has offered a closer look at this phenomenon. Patients taking an SGLT2 inhibitor showed increased activation in brain areas associated with reward and craving when exposed to food cues, along with a measurable increase in carbohydrate intake and appetite scores.12PubMed Central. Effects of Dapagliflozin and Combination Therapy With Exenatide on Food-Cue Induced Brain Activation in Patients With Type 2 Diabetes In other words, the drug isn’t just making you a little peckish. It’s specifically tuning your brain’s reward system to seek out the very foods that would undermine your blood sugar control.
Knowing this gives you an advantage. When those cravings hit, they’re not a failure of willpower; they’re a pharmacological side effect. The practical response is to have satisfying options available that don’t spike your blood sugar. Nuts, cheese, Greek yogurt, vegetables with hummus, or a piece of fruit with some protein can all take the edge off a craving without undoing what the medication is trying to accomplish. The goal isn’t to fight every hunger signal. The goal is to avoid reflexively reaching for cookies, soda, or candy when that signal arrives.
Key Foods to Prioritize
There’s no official “Jardiance diet,” but the foods that help most are ones that address the specific gaps the drug creates: steady complex carbohydrates, adequate hydration, and foods rich in certain minerals. Here’s what to build your meals around:
- Whole grains: Brown rice, oats, quinoa, and whole wheat bread provide the slow-burning carbohydrates your body needs to avoid ketoacidosis risk. They also keep blood sugar from spiking as sharply as refined carbs do.
- Legumes: Beans, lentils, and chickpeas are rich in fiber, magnesium, and potassium, all of which are relevant when taking Jardiance. They’re also filling enough to help manage the compensatory hunger the drug can trigger.
- Leafy greens and vegetables: Spinach, Swiss chard, broccoli, and similar vegetables are among the best dietary sources of magnesium. They also provide potassium and contribute to your fluid intake.
- Nuts and seeds: Almonds, pumpkin seeds, and cashews pack magnesium and healthy fats. They make excellent snacks when carb cravings strike.
- Lean proteins: Fish, poultry, eggs, and tofu help you feel satisfied and support muscle maintenance, especially important since some of the weight lost on Jardiance can come from lean mass if protein intake is low.
- Fruits: Fresh fruit offers natural sugars alongside fiber, water, and micronutrients. Berries, apples, and citrus fruits are particularly good options that don’t cause large glucose spikes.
- Dairy or calcium-fortified alternatives: Yogurt, milk, and fortified plant milks provide calcium and, in the case of yogurt, protein that supports satiety.
The common thread is foods that are nutrient-dense, moderately carbohydrate-containing, and not highly processed. You don’t need a special or restrictive diet. You need a balanced one that avoids the two extremes: too few carbs (ketoacidosis risk) and too many refined sugars (which counteract what the medication is doing).
Minerals and Electrolytes That Shift on Jardiance
Jardiance doesn’t just affect glucose. It nudges several minerals in directions worth knowing about. A meta-analysis covering over 15,000 patients across 18 randomized trials found that SGLT2 inhibitors increase serum magnesium levels by a small but consistent amount.13PubMed Central. Mineral and Electrolyte Disorders With SGLT2i Therapy They also cause small increases in potassium and phosphate.14PubMed. SGLT2 inhibitors-induced electrolyte abnormalities: An analysis of the associated mechanisms For most people with normal kidney function, these shifts are minor and stay within safe ranges. But they matter if your kidneys are already compromised or if you’re taking other medications that affect the same minerals, such as certain blood pressure drugs that raise potassium.
What this means for your diet is mostly reassuring: the slight magnesium boost is actually welcome, since many people with diabetes run low on magnesium to begin with. Eating magnesium-rich foods like leafy greens, nuts, and whole grains supports this benefit. For phosphate and potassium, the increases are small enough that you don’t need to restrict these minerals from your diet unless your doctor tells you otherwise based on bloodwork.
What Jardiance Does to Calcium and Bone Markers
A separate area of interest is bone health. A placebo-controlled study found that empagliflozin temporarily increased serum phosphate and parathyroid hormone levels after three days of treatment, while decreasing active vitamin D levels. Interestingly, these changes did not persist after three months of continued treatment, suggesting the body adapts.15Bone Reports. Effects of empagliflozin on markers of calcium and phosphate homeostasis in patients with type 2 diabetes – Data from a randomized, placebo-controlled study The early dip in active vitamin D is worth noting because it’s the form your body uses to absorb calcium from food.
Even though these changes appear to normalize over time, making sure your diet includes enough calcium and vitamin D is a reasonable precaution, especially if you’re at higher risk for bone loss due to age, menopause, or steroid use. Dairy products, fortified foods, canned fish with bones (like sardines), and sensible sun exposure all contribute. If you’re concerned, ask your doctor about checking your vitamin D levels; it’s a simple blood test.
Salt, Blood Pressure, and Jardiance
Jardiance has a mild blood-pressure-lowering effect, which for most people with type 2 diabetes is a bonus. The mechanism appears to involve the drug’s promotion of glucose and sodium excretion in the urine, which together create a mild diuretic effect.16European Heart Journal – Cardiovascular Pharmacotherapy. Sodium–glucose cotransporter 2 inhibition: cardioprotection by treating diabetes—a translational viewpoint explaining its potential salutary effects Research has shown that empagliflozin decreases the sodium concentration in urine, while the overall fraction of filtered sodium that gets reabsorbed stays about the same as with placebo.4PubMed Central. Effects of empagliflozin on renal sodium and glucose handling in patients with acute heart failure
From a food standpoint, this doesn’t mean you need to eat more salt to compensate. Most people eating a typical diet get plenty of sodium already. But if you’re also on a very low-sodium diet, taking diuretics, or exercising intensely in the heat, the combination of salt losses could occasionally leave you feeling dizzy or lightheaded. Pay attention to how you feel, particularly when standing up quickly. If you notice symptoms, a modest increase in salt intake or an electrolyte drink (without excessive sugar) is a reasonable first step before calling your doctor.
Foods and Drinks to Be Careful With
A few categories deserve caution, not because they interact chemically with Jardiance, but because they work against what the drug is trying to achieve or amplify its side effects.
- Sugary drinks: Soda, fruit juice, sweetened coffee drinks, and energy drinks deliver a rapid glucose load. While Jardiance will flush some of that glucose out, you’re still creating unnecessary blood sugar spikes and consuming empty calories that feed the compensatory appetite cycle.
- Alcohol: Drinking on Jardiance raises several flags. Alcohol is a diuretic, compounding the fluid loss the drug already causes. Heavy drinking is also recognized as a risk factor for euglycemic ketoacidosis in people on SGLT2 inhibitors.7Journal of the Endocrine Society. A Case Report of Euglycemic Diabetic Ketoacidosis in the Setting of Keto Diet and SGLT-2 Inhibitors Moderate drinking may be fine for many people, but it’s worth discussing with your prescriber, especially if you also skip meals when you drink.
- Highly processed sweets: Cookies, candy, pastries, and similar foods are particularly tempting on Jardiance because of the compensatory carb cravings described above. They also tend to be high in refined carbohydrates and low in the fiber and nutrients that help moderate blood sugar responses.
- Meal-replacement shakes with very low carbs: Some commercial shakes are designed for ketogenic diets and contain negligible carbohydrates. If these become a major part of your intake, they carry the same risk as a keto diet itself.
When You’re Sick or Not Eating Normally
The highest-risk moments on Jardiance aren’t typical days. They’re the days when your routine breaks down: a stomach bug that keeps you from eating, a surgery that requires fasting, an illness that suppresses your appetite. During those periods, your carbohydrate and fluid intake can drop low enough to trigger the dangerous metabolic shift toward ketoacidosis. Many prescribers recommend temporarily stopping Jardiance during acute illness, surgery, or any period when you can’t eat or drink normally. This is sometimes called “sick day rules” for SGLT2 inhibitors, and it’s worth having that conversation with your doctor before you actually get sick, so the plan is in place.
The case report of the elderly patient who developed severe dehydration on empagliflozin underscores this point.9PubMed Central. Short-Term Treatment with Empagliflozin Resulted in Dehydration and Cardiac Arrest in an Elderly Patient with Specific Complications: A Case Report and Literature Review That patient’s trouble started not from the drug alone, but from the combination of the drug with reduced food and fluid intake. The drug kept doing its job, flushing glucose and pulling water into the urine, while intake fell off. If you find yourself unable to eat for more than a day or so, contact your healthcare team about whether to pause the medication temporarily.
Jardiance and Chronic Kidney Disease
Jardiance is increasingly prescribed not just for diabetes but for chronic kidney disease and heart failure. The EMPA-KIDNEY trial demonstrated a 28% reduction in combined risk of kidney disease progression or cardiovascular death compared with placebo.10PubMed. Liberal fluid intake versus fluid restriction in chronic heart failure: a randomized clinical trial If you’re taking Jardiance for kidney protection, the dietary considerations are largely the same as above, with one important addition: kidney disease often comes with its own dietary restrictions on potassium, phosphorus, and protein. Since Jardiance can nudge potassium and phosphate levels upward, coordinating with a dietitian who understands both your kidney stage and your medication list is genuinely useful rather than optional. The mineral shifts that are harmless for someone with healthy kidneys can become problematic when kidney filtration is already reduced.
People with advanced kidney disease also tend to have more fragile fluid balance, which makes the hydration advice above even more important. The drug’s glucose-flushing effect diminishes as kidney function declines, but the electrolyte and volume effects don’t disappear entirely.
The Relationship Between Jardiance and Food Behaviors
Qualitative research exploring the experiences of adults with type 2 diabetes on SGLT2 inhibitors has revealed something psychologically interesting. Many participants reported a complex, often negative relationship with food that predated the medication, involving feelings of restriction and deprivation.11PubMed. Increased sugar intake as a form of compensatory hyperphagia in patients with type 2 diabetes under dapagliflozin treatment When the drug improved their blood sugar control and produced weight loss, some felt motivated to make additional positive changes to their eating habits. Others, however, found that the improved numbers gave them a false sense of permission to eat poorly, reasoning that the drug would “handle it.”
This psychological dynamic is worth being honest about. Jardiance is powerful, but it’s not an eraser for a poor diet. It flushes roughly 60 to 80 grams of glucose per day in most studies, which is meaningful but far from unlimited. If compensatory cravings push you to eat an extra 300 or 400 calories daily in refined carbs, you can easily cancel out the caloric deficit the drug creates and lose much of the weight benefit. Building a sustainable eating pattern that you actually enjoy, rather than swinging between restriction and indulgence, matters more on this drug than on most.