Can losing weight noticeably improve my blood pressure and cholesterol?
Losing weight noticeably lowers your blood pressure and improves your cholesterol profile, but which value improves the most depends on your diet. And if the weight comes back, most of the gains disappear too.
Losing weight has a clear positive effect on your blood pressure. With an average weight loss of 5 kilograms, your systolic (upper) blood pressure drops by about 4 to 5 mmHg and your diastolic (lower) blood pressure by 3 to 4 mmHg. The more weight you lose, the greater the effect. Combine that with eating less salt or following a healthy diet, and the effect becomes even stronger.
The effect on cholesterol is a little more nuanced. A low-fat diet lowers LDL (the 'bad' type) the most, by an average of about 7 mg/dL. A low-carbohydrate diet does little for LDL but slightly raises your HDL (the protective type). With most types of diet, losing 5 to 10% of your body weight improves your HDL, although that effect is modest.
How long the gains last is a serious consideration. After six months, the improvements are clearly visible, but after twelve months they have largely disappeared with most diets, probably because some of the weight comes back by then. The Mediterranean diet is an exception: its benefits tend to hold up for longer.
In people who use medication to help them lose weight, the blood pressure effects are well supported. Tirzepatide lowered systolic blood pressure after 72 weeks by nearly 7 mmHg and diastolic blood pressure by more than 4 mmHg compared with a placebo. Around 68 to 71% of that was directly attributable to the weight loss itself. Semaglutide showed a similar picture: a drop of nearly 5 mmHg in systolic blood pressure, and people using it were more often able to reduce their blood pressure medication. One note of caution: with tirzepatide, blood pressure that dropped too low occurred slightly more often than with a placebo, though this was rare.
Finally, there is an early indication that the timing of meals matters. An analysis of 12 small studies found that eating early, with a window in the morning and early afternoon, improved blood pressure and the body's ability to manage blood sugar better than eating later in the day or having no time restriction at all. Interesting, but the evidence is preliminary and needs confirmation in larger studies.
Based on 8 claims with PMIDs: 28455679, 12975389, 32238384, 39084707, 39217502, 39505584, 36702768. The sources include many studies combined, large studies into tirzepatide and semaglutide, and a small review of studies on time-restricted eating (12 studies). The blood pressure effects are the best supported; the cholesterol effects are more diet-dependent and moderately supported.
Does lowering my blood pressure really reduce my risk?
Lowering blood pressure genuinely works: your risk of stroke and other cardiovascular problems demonstrably decreases. Exercise and dark chocolate also provide a modest additional benefit.
What does my blood pressure tell me about my long-term health?
Your blood pressure and how much it fluctuates between measurements clearly say something about your risk of heart and vascular disease and dying in the long term. For those who are eligible for treatment, medication is the most evidence-backed step.
Does garlic help against high blood pressure or high cholesterol?
Garlic supplements measurably lower blood pressure in people with hypertension and have a modest favourable effect on cholesterol. They are not a replacement for medication, but can be a worthwhile addition in cases of mildly elevated levels.
Does climbing stairs actually do anything for my heart?
People who climb stairs regularly show a clearly lower risk of dying from heart disease in large studies. Even five minutes a day appears to be enough to improve your cardiometabolic profile.
Does intermittent fasting lower your cholesterol?
Intermittent fasting probably lowers total cholesterol and LDL modestly, but its effect on 'good' HDL cholesterol is unclear and long-term data are limited. It is a worthwhile strategy as a complement to, not a replacement for, proven treatments.
Can your gut microbiome affect your cholesterol?
Your gut microbiome influences your cholesterol through bile acid conversion and the fermentation of fibres. Eating more fibre is the most concrete and safe step to take; supplements such as berberine are not yet sufficiently substantiated for daily use.