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Weight and metabolism 11 min

Zepbound vs Wegovy: the head-to-head trial, the labels and the price

SURMOUNT-5 (NEJM, 2025) randomized 751 adults with obesity and no type 2 diabetes to tirzepatide or semaglutide at the maximum tolerated dose for 72 weeks: mean weight loss 20.2 percent against 13.7, waist 18.4 cm against 13.0. It was open-label and Lilly-funded. The labels share their core warnings, nausea led each drug's own trials, and neither label allows a cross-trial side-effect comparison. Cash: Zepbound KwikPen $299 to $699 a month by dose, $449 on 7.5 mg and up with refills within 45 days; Wegovy pen $199 for two new-patient fills, then $349 ($399 for 7.2 mg).

Weight and metabolism 11 min

What happens when you stop Ozempic: the trials that measured it

In the STEP 1 extension, people who lost 17.3 percent on semaglutide 2.4 mg regained 11.6 percentage points in the year after stopping, about two thirds of the loss, and their cardiometabolic gains reverted toward baseline. In SURMOUNT-4, switching from tirzepatide to placebo meant a 14 percent regain from week-36 weight over 52 weeks against a further 5.5 percent loss on the drug. In STEP 4, placebo regained 6.9 percent from week-20 weight over 48 weeks against a 7.9 percent loss on semaglutide. No trial tested a taper. Semaglutide's half-life is about a week, tirzepatide's about five days.

Weight and metabolism 11 min

Wegovy pill vs injection: what one label says about both

The Wegovy tablet (25 mg daily) and injection (2.4 mg weekly) share one label. In adults without type 2 diabetes the label says their average semaglutide levels are similar, but the tablet is 1 to 2 percent absorbed and must be taken on an empty stomach with up to 4 ounces of water, 30 minutes before anything else. Its trial: 13.6 percent mean weight loss at 64 weeks against 2.4 on placebo. The injection's: 14.9 percent at 68 weeks against 2.4. In type 2 diabetes the tablet is unstudied for weight loss and gives lower levels. Self-pay: pill from $149 a month, pen $199 for two fills then $349.

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Weight and metabolism 11 min

Ozempic cost without insurance in 2026: Novo's own prices, dose by dose

Novo's self-pay offer prices the Ozempic pen at $349 a month (0.25 to 1 mg) and $499 (2 mg), with $199 for new patients' first two fills through December 31, 2026, and the pill at $149, $199 or $299 by dose. List price is $1,027.51 per pen or bottle, and the pen's falls to $675 on January 1, 2027; self-pay prices do not change. With commercial coverage the card takes the copay to as little as $25 (the card saves at most $100 a month); government beneficiaries are excluded. Every offer requires an on-label prescription, and the label is type 2 diabetes.

Weight and metabolism 13 min

GLP-1 side effects: what the labels report, drug by drug

From the Wegovy, Zepbound and Foundayo labels: nausea in 44, 25 to 29 and 26 to 35 percent of people against 16, 8 and 10 on placebo, mostly during dose escalation; 6.8, 4.8 to 6.7 and 6 to 10 percent stopped for side effects against about 3 on placebo. Serious events are rare and measured: pancreatitis at 0.14 to 0.2 cases per 100 patient-years, gallstones in 1 to 2.5 percent, acute kidney injury in 0.2 to 0.5 percent on Zepbound and Foundayo. The boxed warning is thyroid C-cell tumors in rodents, unknown in humans. The labels name the symptoms that mean stop and call.

Weight and metabolism 15 min

Does Ozempic cause hair loss? What the labels and the 2026 studies say

The Wegovy label reports hair loss in 3.3 percent of adults on 2.4 mg versus 1 percent on placebo, and 5.8 percent at 7.2 mg, with the rate in women several times the rate in men (8.4 versus 0.2 percent). Zepbound and Foundayo report 4 to 5 percent with the same split. A July 2026 BMJ cohort in type 2 diabetes found a 37 to 68 percent higher hazard than other diabetes drugs at about 7 versus 4 to 5 cases per 1,000 person-years; a September 2026 genetic study points at the receptor itself in predisposed men. Shedding after a trigger regrows within six to nine months, per the AAD.

Labs and biomarkers 8 min

A high creatinine that is not kidney damage: drugs and supplements that move the number

Creatinine reaches urine by filtration and by active tubular secretion. Drugs that block the second route, trimethoprim and cobicistat among them, raise serum creatinine and lower estimated GFR without changing filtration. For creatine supplements the measured rise is small, and the trials behind it did not include people with kidney disease.

Weight and metabolism 10 min

Does Medicare cover GLP-1 weight loss drugs? The 2026 rules

Part D still cannot pay for a drug prescribed for weight loss, and that has not changed. What changed on July 1, 2026 is that a separate program, the Medicare GLP-1 Bridge, began offering three specific products for a $50 monthly copay outside the Part D benefit. The list is narrower than it sounds, and the $50 does not count toward your out-of-pocket cap.

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Weight and metabolism 8 min

GLP-1 friendly foods: what to eat when the drug has taken your appetite

On a GLP-1 the binding constraint is not which foods you choose, it is how little food you can face. Semaglutide's own label reports nausea in 44 percent of people and constipation in 24 percent, and the drug delays gastric emptying. Eat protein first, keep fat modest at any single sitting, and treat fluid and fiber as scheduled, not incidental.

Labs and biomarkers 7 min

What your A1C means, and the conditions that make it wrong

An A1C below 5.7 percent is normal, 5.7 to 6.4 is prediabetes and 6.5 or above is diabetes. The test measures glucose stuck to hemoglobin over about three months, which means anything that changes the life of a red blood cell changes the result, and several common conditions do.

Labs and biomarkers 6 min

Vitamin B12 levels: the gray zone between 200 and 400, and how to settle it

The NIH Office of Dietary Supplements treats serum B12 below 200 or 250 pg/mL as subnormal, and names methylmalonic acid as the most sensitive marker, able to confirm deficiency when serum B12 sits anywhere between 150 and 399 pg/mL. That range is wide, it covers many results reported as normal, and it is the whole reason B12 testing confuses people.

Labs and biomarkers 7 min

Normal hemoglobin levels: the cutoff is a percentile, not a verdict

WHO's 2024 guideline defines anemia at a hemoglobin below 130 g/L in men and below 120 g/L in non-pregnant women aged 15 to 65. Those cutoffs are the 5th percentile of a healthy population, which means one healthy adult in twenty sits below the line by construction, and WHO itself treats anemia as a sign of something else rather than a diagnosis.

Hormones 10 min

Menopause weight gain: the scale is the wrong instrument

The best longitudinal data says the menopause transition does not accelerate weight gain. Weight climbs through the forties on an unchanged slope and keeps climbing at the same rate through the transition. What changes is composition: fat gain roughly doubles while lean mass starts falling, and visceral fat begins rising at over 6 percent a year.

Strength, mobility and aging 11 min

How to reduce dementia risk: what WHO rates strong, and what the trials actually found

WHO's second-edition dementia risk guideline, published in July 2026, makes exactly one strong recommendation on moderate-certainty evidence for people with normal cognition: physical activity. It also recommends against vitamin B, vitamin E, omega-3 and multivitamin supplements for this purpose, and records insufficient evidence for depression, stroke, brain injury, vision and sleep interventions.

Labs and biomarkers 7 min

High uric acid without gout: what the rheumatology guideline says to do

The American College of Rheumatology defines asymptomatic hyperuricemia as a serum urate of 6.8 mg/dL or above with no prior gout flare and no tophi, and conditionally recommends against starting any urate-lowering drug for it. That recommendation rests on high certainty evidence, which is rare in this guideline.

Hormones 8 min

High TSH with a normal free T4: what subclinical hypothyroidism does and does not mean

A raised TSH with a normal free T4 is called subclinical hypothyroidism, and the largest randomized trial in older adults found levothyroxine produced no improvement in hypothyroid symptoms or tiredness at one year. The AACE and ATA position is that treatment below a TSH of 10 should be tailored to the individual, not automatic.

Labs and biomarkers 10 min

High ALT on a blood test: what the number means and what to do next

The American College of Gastroenterology puts the true healthy upper limit for ALT at 29 to 33 IU/L for men and 19 to 25 IU/L for women, below what many laboratories flag. The most common cause of a mildly high result is fat in the liver, and the question that actually matters is not the enzyme, it is whether the liver has scarred.

Heart health 9 min

Does walking lower blood pressure? A Cochrane review of 73 trials has the number

Pooling 73 randomized trials and 5,060 participants, a Cochrane review found walking reduced systolic blood pressure by 4.11 mmHg, on moderate-certainty evidence. Diastolic fell less, on weaker evidence, and the effect was similar whether participants started with normal or high blood pressure.

Heart health 7 min

Blood pressure ranges: the 2025 categories and what each one actually triggers

The 2025 AHA and ACC guideline kept the four categories introduced in 2017 and changed what happens inside them. Stage 1 hypertension now triggers medication for anyone with cardiovascular disease, kidney disease, diabetes, or a PREVENT 10-year risk of 7.5 percent or more, and the overarching treatment goal is below 130 over 80 for all adults.

Strength, mobility and aging 10 min

The best exercise to prevent osteoporosis depends on which bone, and which outcome

The exercise that builds bone and the exercise that stops you falling on it are not the same exercise. Cochrane rates the fall-prevention evidence high certainty for balance and functional work, and says the effect of resistance training alone, and of walking, on falls is uncertain. Bone density answers differ by skeletal site.

Labs and biomarkers 5 min

TSH normal range: 0.45 to 4.12, and why that is too tight after 70

The standard adult TSH interval is 0.45 to 4.12 mIU/L. But the 97.5th centile rises from 3.56 in your twenties to 7.49 after 80, and 70 percent of older people flagged with a TSH above 4.5 are inside their own age group's range.