Browse the evidence

Obesity is a chronic disease characterized by physiological dysregulation of fat mass, not merely a result of willful behavioral choices.

Stop blaming yourself for your weight. Obesity is a chronic disease driven by your body's physiology, not just your willpower. Seek medical treatment because your body is fighting you, and you need professional help to manage it.

SGLT2 inhibitors improve cardiovascular outcomes in heart failure patients, including those with preserved and reduced ejection fraction, independent of diabetes status.

If you have heart failure, ask your doctor about SGLT2 inhibitors. They are now recommended for heart failure patients regardless of whether they have diabetes, as they significantly improve outcomes.

Resmetirom, a THR-β agonist, improves histologic features of MASLD, including resolution of steatohepatitis without worsening fibrosis and improvement in fibrosis stage, in patients with F1-F3 fibrosis.

Resmetirom is the first FDA-approved drug for MASH. In clinical trials, doses of 80mg or 100mg taken daily for 52 weeks significantly improved liver inflammation and fibrosis compared to placebo. It is an option for those with F1-F3 fibrosis.

Obesity is a chronic, highly heritable neurological disease driven by central nervous system regulation of satiety and reward, rather than solely a behavioral failure of willpower.

Obesity is a biological condition involving brain pathways that control hunger and reward, heavily influenced by genetics. This means it is not simply a failure of willpower. Effective management often requires addressing these biological drivers, potentially through medical therapies that target these specific pathways, rather than relying solely on lifestyle changes which may be insufficient for those with high genetic risk.

GLP-1 receptor agonists provide significant cardiovascular risk reduction in both diabetic and non-diabetic patients with established cardiovascular disease, a benefit that is significantly under-recognized by physicians, particularly for non-diabetic patients.

For patients with obesity and established cardiovascular disease, GLP-1 agonists offer significant cardiovascular risk reduction (20% reduction in MACE in non-diabetics). Prescribers should be aware of these benefits to ensure appropriate patient selection and counseling, regardless of diabetic status.

The gut pathobiont Bilophila wadsworthia acts as a glycine sink by metabolizing glycine via the glycine reductase pathway, thereby lowering circulating glycine levels and negatively impacting metabolic markers.

The presence of the gut bacteria Bilophila wadsworthia consumes glycine, reducing its beneficial effects. Vegan diets tend to reduce this bacteria, thereby increasing glycine. While probiotics targeting this specific bacteria are not yet standard, understanding this link highlights why microbiome composition matters for metabolic health.

MASLD is an independent risk factor for cardiovascular disease, including heart failure (particularly HFpEF), atrial fibrillation, and atherosclerosis, driven by shared mechanisms like insulin resistance and inflammation.

If you have fatty liver disease (MASLD), you are at a significantly higher risk for heart problems, including heart failure and atrial fibrillation, even if your liver enzymes are normal. This risk is driven by the same metabolic issues that cause fatty liver. You need regular cardiovascular screening and aggressive management of blood pressure, cholesterol, and blood sugar to protect your heart.

GLP-1 receptor agonists are associated with gastrointestinal side effects (nausea, vomiting, diarrhea) and potentially increased risks of pancreatitis and thyroid cancer.

GLP-1 agonists commonly cause GI issues like nausea and diarrhea, especially when starting or increasing the dose. Serious but rare risks include pancreatitis and thyroid cancer. Monitor your health and report severe symptoms to your doctor.

GLP-1 based therapies carry class-wide safety warnings including gastrointestinal effects, gallbladder events, pancreatitis risk, and a boxed warning for medullary thyroid carcinoma based on rodent data.

These medications work well but can cause nausea, vomiting, or other GI issues. Your doctor will start you on a low dose and slowly increase it to help your body adjust. If you have a family history of specific thyroid cancers, you cannot take these drugs.

Tight glycemic control (HbA1c ≤ 6.5%) in Type 2 Diabetes does not significantly reduce major cardiovascular events or all-cause mortality compared to standard control, and may increase mortality and hypoglycemia risk.

For Type 2 Diabetics, aiming for an A1c of 7% or slightly higher (if safe) is often as effective for heart protection as aiming for very low numbers (≤6.5%), while avoiding the risks of severe hypoglycemia and weight gain. Focus on overall cardiovascular risk management (blood pressure, lipids) rather than obsessing over ultra-tight glucose control, unless you are newly diagnosed with Type 1 Diabetes.

Intensive blood pressure control (Systolic < 120 mmHg) in Type 2 Diabetes does not reduce major cardiovascular events compared to standard control (< 140 mmHg) and increases adverse events like hypotension and renal failure.

For Type 2 Diabetics with high blood pressure, aiming for a standard target (e.g., <140/90 mmHg) is likely sufficient for preventing major heart events and avoids the risks of side effects like fainting or kidney stress associated with very aggressive lowering (<120 mmHg). Consult your doctor for a personalized target based on age and comorbidities.

SGLT2 inhibitors and GLP-1 receptor agonists reduce hospitalization for heart failure, chronic kidney disease, and atherosclerotic cardiovascular disease in patients with type 2 diabetes.

If you have type 2 diabetes and heart or kidney issues, ask your doctor about SGLT2 inhibitors or GLP-1 RAs. These drugs do more than lower blood sugar; they protect your heart and kidneys, reducing the risk of hospitalization and death.

GLP-1 receptor agonists provide renoprotective effects by slowing eGFR decline and reducing albuminuria in patients with type 2 diabetes and chronic kidney disease.

If you have diabetes and kidney issues, GLP-1 medications can help protect your kidneys and heart, not just your blood sugar. This protection happens through multiple mechanisms, including reducing inflammation and improving blood flow to the kidneys. However, gastrointestinal side effects are common and may require dose adjustments or management strategies.

Tirzepatide sensitizes leptin signaling in hypothalamic POMC and GLP-1R neurons, increasing POMC neuronal firing by decreasing inhibitory postsynaptic input.

Tirzepatide works in part by making your brain's natural weight-regulating hormones more effective. This leads to reduced hunger and increased energy expenditure, contributing to weight loss.

Discontinuation of incretin-based pharmacotherapy (GLP-1 or dual GLP-1/GIP agonists) leads to partial or complete weight regain due to the reactivation of homeostatic neurohormonal systems (increased ghrelin, decreased leptin and peptide YY), confirming obesity as a chronic condition requiring long-term management.

If you stop taking your incretin medication (like semaglutide or tirzepatide), your body's natural hunger signals will likely return, causing you to regain the weight you lost. This is a biological response, not a lack of willpower. To keep the weight off, you must treat obesity as a chronic condition and continue your medication and lifestyle habits long-term, just as you would for high blood pressure.

GLP-1 receptor agonists improve cardiovascular outcomes in patients with atherosclerotic cardiovascular disease (ASCVD) and heart failure with preserved ejection fraction (HFpEF), but may increase heart failure hospitalization risk in patients with heart failure with reduced ejection fraction (HFrEF).

If you have heart disease or heart failure, GLP-1 RAs can significantly reduce your risk of major cardiovascular events like heart attack or stroke, especially if you have HFpEF. However, if you have HFrEF (reduced ejection fraction), these drugs may increase your risk of hospitalization, so your doctor will need to carefully weigh the risks and benefits.

Retatrutide has the highest adverse event risk among the treatments studied.

Clinicians should be aware of the higher risk of adverse events when prescribing retatrutide.

The risk of gastrointestinal adverse events was higher among semaglutide participants than placebo.

Clinicians should monitor for gastrointestinal side effects in patients using semaglutide, although most are manageable.

Tirzepatide and GLP-1 RA across all doses had significant increases in gastrointestinal adverse effects compared to placebo.

Clinicians should monitor gastrointestinal side effects in patients treated with tirzepatide and GLP-1 RA.

Use of GLP-1 receptor agonists (GLP-1 RAs) is associated with an increased risk of gallbladder or biliary diseases (RR, 1.37; 95% CI, 1.23-1.52).

Healthcare providers should be aware of the potential increased risk of gallbladder diseases when prescribing GLP-1 RAs.

GLP-1 RA use is associated with a higher risk of gallbladder or biliary diseases at higher doses (RR, 1.56; 95% CI, 1.36-1.78) compared to lower doses (RR, 0.99; 95% CI, 0.73-1.33).

Dosing strategies for GLP-1 RAs should consider the potential increased risk of gallbladder diseases.

One-year discontinuation was significantly higher for patients without type 2 diabetes (64.8%) compared with those with type 2 diabetes (46.5%).

Practitioners should be aware that patients without type 2 diabetes may struggle more with adherence to GLP-1 RA therapy.

Ozempic users increased from 569 in 2019 to 7667 in 2020, with a count of 22,891 in 2022.

Practitioners should be aware of the rapid increase in Ozempic usage, indicating its growing acceptance and demand.

Adverse events were more frequent with liraglutide, with 80% of participants experiencing gastrointestinal events compared to 57% with placebo.

Clinicians should monitor for gastrointestinal side effects when prescribing liraglutide.