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Hypertension

Hypertension is probably the most prevalent and most undertreated modifiable cardiovascular risk factor in the world: roughly one third of the adult population has it, and only a modest proportion have their numbers adequately controlled… Read more.

30 factors with evidence, ordered from most to least effective. Information, not medical advice.

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In depth

⏱ 3 min read

Hypertension is probably the most prevalent and most undertreated modifiable cardiovascular risk factor in the world: approximately one third of the adult population has it, and only a modest proportion have adequately controlled levels; each 10 mmHg reduction in systolic pressure is associated with a 20% reduction in major cardiovascular events and a 13% reduction in all-cause mortality; the combination of nutritional and lifestyle interventions can reduce blood pressure by magnitudes comparable to individual antihypertensive drugs, especially in mild hypertension and prehypertension.

Numbers and categories (updated ESC/AHA classification)

  • Optimal: < 120/80 mmHg.
  • Normal: 120-129/80-84.
  • High-normal or prehypertension: 130-139/85-89.
  • Grade 1 hypertension: 140-159/90-99.
  • Grade 2 hypertension: 160-179/100-109.
  • Grade 3 hypertension: ≥ 180/110.

Correct measurement is critical: at rest, seated, after a 5-minute wait, with an appropriate cuff, averaging several measurements. Home self-monitoring is usually more informative than a single reading in the office (white coat effect).

Lifestyle interventions with robust support

Reducing dietary sodium: from 9-12 g/day (average Western intake) to 5-6 g/day lowers blood pressure by 4-5 mmHg in people with hypertension and by 1-2 mmHg in people with normal blood pressure. Most of the sodium in the modern diet comes from processed and ultra-processed foods, not from the household salt shaker.

Increasing dietary potassium: 3.5-4.7 g/day from fruits, vegetables, and legumes lowers blood pressure by 3-5 mmHg. The Na/K balance is probably more important than either one alone. Caution: people with kidney failure or who take drugs that raise potassium should not increase potassium without supervision.

Weight loss: each kilogram lost lowers systolic pressure by approximately 1 mmHg.

DASH diet (Dietary Approaches to Stop Hypertension): rich in fruits, vegetables, nonfat dairy, whole grains, nuts, legumes, and fish; low in saturated fat, red meat, and added sugars. Lowers blood pressure by 8-14 mmHg.

Mediterranean diet: effects similar to DASH, with better long-term adherence.

Regular aerobic exercise (150 min/week moderate or 75 min/week vigorous): lowers systolic pressure by 5-8 mmHg.

Strength training (2-3 sessions/week): modest reduction.

Reducing alcohol: maximum 1-2 units/day for men, 1 for women. Ideal: less.

Smoking cessation: although the acute effect is modest, the overall cardiovascular effect is enormous.

Chronic stress management: mindfulness, contact with nature, social ties.

Sufficient, good-quality sleep: treat sleep apnea if present.

Supplements with clinical backing

Dietary nitrates (beetroot juice): 4-10 mmHg reduction in systolic pressure with regular consumption.

Coenzyme Q10: modest support in essential hypertension.

Magnesium: in people with a deficiency, supplementation lowers blood pressure modestly.

Hibiscus tea: moderate support.

Hawthorn (Crataegus): with European regulatory support for mild hypertension.

Aged garlic: modest reduction of 5-8 mmHg in mild hypertension.

Omega-3 EPA/DHA (3+ g/day): modest reduction.

Cocoa and cocoa polyphenols: modest reduction of 3-5 mmHg.

Drugs: when they are needed

In grade 2 or higher hypertension, and in grade 1 with high cardiovascular risk, drugs are usually necessary. The main classes: - ACE inhibitors (enalapril, ramipril, perindopril): first line, especially with diabetes or kidney disease. - ARBs (losartan, valsartan, irbesartan, telmisartan): alternative with better tolerability. - Calcium channel blockers (amlodipine, lercanidipine): first line in older adults. - Thiazide diuretics (hydrochlorothiazide, indapamide): first line in older adults. - Beta-blockers (bisoprolol, carvedilol): especially with ischemic heart disease or heart failure.

Combining two drugs at low doses is usually more effective and better tolerated than one drug at a high dose.

The reasonable conclusion

Hypertension is highly controllable with combined interventions: DASH or Mediterranean diet, sodium reduction, increased potassium, weight loss, regular exercise, alcohol reduction, stress management, adequate sleep; complemented with specific supplements when they provide additional benefit (nitrates, magnesium if there is a deficiency, CoQ10 in some cases); when these measures are not enough, modern antihypertensive drugs are effective and well tolerated, and their use is not a sign of personal failure but of appropriate management.

References

  1. Williams, B. et al. (2018). 2018 ESC/ESH Guidelines for the management of arterial hypertension. Eur Heart J 39, 33. doi:10.1093/eurheartj/ehy339
  2. Sacks, F.M. et al. (2001). Effects on blood pressure of reduced dietary sodium and the Dietary Approaches to Stop Hypertension (DASH) diet. N Engl J Med 344, 1. doi:10.1056/NEJM200101043440101
  3. Aburto, N.J. et al. (2013). Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses. BMJ 346. doi:10.1136/bmj.f1378
  4. Siervo, M. et al. (2013). Inorganic nitrate and beetroot juice supplementation reduces blood pressure in adults: a systematic review and meta-analysis. J Nutr 143, 6. doi:10.3945/jn.112.170233
  5. Ettehad, D. et al. (2016). Blood pressure lowering for prevention of cardiovascular disease and death: a systematic review and meta-analysis. Lancet 387, 10022. doi:10.1016/S0140-6736(15)01225-8
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Hypertension

⏱ 3 min read

Hypertension is probably the most prevalent and most undertreated modifiable cardiovascular risk factor in the world: approximately one third of the adult population has it, and only a modest proportion have adequately controlled levels; each 10 mmHg reduction in systolic pressure is associated with a 20% reduction in major cardiovascular events and a 13% reduction in all-cause mortality; the combination of nutritional and lifestyle interventions can reduce blood pressure by magnitudes comparable to individual antihypertensive drugs, especially in mild hypertension and prehypertension.

Numbers and categories (updated ESC/AHA classification)

Correct measurement is critical: at rest, seated, after a 5-minute wait, with an appropriate cuff, averaging several measurements. Home self-monitoring is usually more informative than a single reading in the office (white coat effect).

Lifestyle interventions with robust support

Reducing dietary sodium: from 9-12 g/day (average Western intake) to 5-6 g/day lowers blood pressure by 4-5 mmHg in people with hypertension and by 1-2 mmHg in people with normal blood pressure. Most of the sodium in the modern diet comes from processed and ultra-processed foods, not from the household salt shaker.

Increasing dietary potassium: 3.5-4.7 g/day from fruits, vegetables, and legumes lowers blood pressure by 3-5 mmHg. The Na/K balance is probably more important than either one alone. Caution: people with kidney failure or who take drugs that raise potassium should not increase potassium without supervision.

Weight loss: each kilogram lost lowers systolic pressure by approximately 1 mmHg.

DASH diet (Dietary Approaches to Stop Hypertension): rich in fruits, vegetables, nonfat dairy, whole grains, nuts, legumes, and fish; low in saturated fat, red meat, and added sugars. Lowers blood pressure by 8-14 mmHg.

Mediterranean diet: effects similar to DASH, with better long-term adherence.

Regular aerobic exercise (150 min/week moderate or 75 min/week vigorous): lowers systolic pressure by 5-8 mmHg.

Strength training (2-3 sessions/week): modest reduction.

Reducing alcohol: maximum 1-2 units/day for men, 1 for women. Ideal: less.

Smoking cessation: although the acute effect is modest, the overall cardiovascular effect is enormous.

Chronic stress management: mindfulness, contact with nature, social ties.

Sufficient, good-quality sleep: treat sleep apnea if present.

Supplements with clinical backing

Dietary nitrates (beetroot juice): 4-10 mmHg reduction in systolic pressure with regular consumption.

Coenzyme Q10: modest support in essential hypertension.

Magnesium: in people with a deficiency, supplementation lowers blood pressure modestly.

Hibiscus tea: moderate support.

Hawthorn (Crataegus): with European regulatory support for mild hypertension.

Aged garlic: modest reduction of 5-8 mmHg in mild hypertension.

Omega-3 EPA/DHA (3+ g/day): modest reduction.

Cocoa and cocoa polyphenols: modest reduction of 3-5 mmHg.

Drugs: when they are needed

In grade 2 or higher hypertension, and in grade 1 with high cardiovascular risk, drugs are usually necessary. The main classes: - ACE inhibitors (enalapril, ramipril, perindopril): first line, especially with diabetes or kidney disease. - ARBs (losartan, valsartan, irbesartan, telmisartan): alternative with better tolerability. - Calcium channel blockers (amlodipine, lercanidipine): first line in older adults. - Thiazide diuretics (hydrochlorothiazide, indapamide): first line in older adults. - Beta-blockers (bisoprolol, carvedilol): especially with ischemic heart disease or heart failure.

Combining two drugs at low doses is usually more effective and better tolerated than one drug at a high dose.

The reasonable conclusion

Hypertension is highly controllable with combined interventions: DASH or Mediterranean diet, sodium reduction, increased potassium, weight loss, regular exercise, alcohol reduction, stress management, adequate sleep; complemented with specific supplements when they provide additional benefit (nitrates, magnesium if there is a deficiency, CoQ10 in some cases); when these measures are not enough, modern antihypertensive drugs are effective and well tolerated, and their use is not a sign of personal failure but of appropriate management.

References

  1. Williams, B. et al. (2018). 2018 ESC/ESH Guidelines for the management of arterial hypertension. Eur Heart J 39, 33. doi:10.1093/eurheartj/ehy339
  2. Sacks, F.M. et al. (2001). Effects on blood pressure of reduced dietary sodium and the Dietary Approaches to Stop Hypertension (DASH) diet. N Engl J Med 344, 1. doi:10.1056/NEJM200101043440101
  3. Aburto, N.J. et al. (2013). Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses. BMJ 346. doi:10.1136/bmj.f1378
  4. Siervo, M. et al. (2013). Inorganic nitrate and beetroot juice supplementation reduces blood pressure in adults: a systematic review and meta-analysis. J Nutr 143, 6. doi:10.3945/jn.112.170233
  5. Ettehad, D. et al. (2016). Blood pressure lowering for prevention of cardiovascular disease and death: a systematic review and meta-analysis. Lancet 387, 10022. doi:10.1016/S0140-6736(15)01225-8