Top 10 Diet Mistakes for Hypertension – And the System That Fixes Them | Healos Integrated Therapy

• 10 Diet Mistakes That Keep Blood Pressure High

"I hardly use salt, and my blood pressure is still high." It's one of the most common frustrations in a doctor's office. The answer usually isn't willpower; it's where sodium and a few other blood pressure triggers are hiding.

Here is the short answer. Blood pressure often stays high even after people stop using the salt shaker, because most sodium comes from packaged, restaurant and prepared foods, including bread, cheese, deli meats, soups and sauces such as soy sauce. Too little potassium from vegetables and legumes, regular alcohol, gradual weight gain and a few surprising foods also keep it up. The DASH pattern lowered systolic pressure by about 11 mmHg in people with hypertension (Appel et al., NEJM, 1997).

Here are the ten most common mistakes, and what to do instead.

简短的答案： 「我几乎不放盐，血压还是高。」这是门诊里最常见的困惑之一。答案通常不在于意志力，而在于钠和其他几个升压因素藏在哪里。

很多人不再用盐瓶后血压依然偏高，因为大部分钠来自包装、餐馆和预制食品，包括面包、奶酪、熟食肉、汤和酱油等调味酱；蔬菜和豆类中的钾太少、经常饮酒、体重慢慢增加，以及几种意想不到的食物，也会让血压降不下来。DASH 饮食曾让高血压患者收缩压降低约 11 mmHg（NEJM 1997）。下面是最常见的十个误区，以及更好的做法。

Mistakes 1–4: where sodium hides

1. Watching only the salt shaker. Most sodium in a typical North American diet comes from packaged, restaurant and prepared foods, not from the salt you add at the table. Instead: read Nutrition Facts labels and aim for products with 5% Daily Value of sodium or less; cook from simple ingredients more often.

2. Believing sea salt or pink salt is healthier. Gram for gram, they contain about the same sodium as table salt. Instead: use less salt of any kind and build flavour with herbs, garlic, citrus, vinegar and spices.

3. Overlooking everyday staples. Bread, cheese, deli and cured meats, pizza, canned soups and frozen meals are among the biggest sources of sodium simply because we eat them often. Instead: choose lower-sodium versions, smaller portions and fresh alternatives.

4. Forgetting the sauces. Soy sauce, oyster sauce, fish sauce, bouillon cubes, instant noodle seasoning and pickled vegetables can carry a day's worth of sodium in a few spoonfuls. This matters especially in many East Asian kitchens. Instead: use reduced-sodium versions, measure rather than pour, and add sauce at the table rather than throughout cooking.

误区 1–4：钠藏在哪里：

1. 只盯着盐瓶：典型北美饮食中，大部分钠来自包装、餐馆和预制食品，而不是餐桌上加的盐；更好的做法：看营养标签，选钠含量每日值 5% 以下的产品，多用简单食材自己做饭。

2. 以为海盐或玫瑰盐更健康：按克计算，钠含量与普通食盐相近；更好的做法：任何盐都少用，用香草、蒜、柑橘、醋和香料提味。

3. 忽视日常主食：面包、奶酪、熟食和腌制肉、披萨、罐头汤和速冻餐，因为吃得频繁而成为最大的钠来源；更好的做法：选低钠版本、减少份量、多选新鲜食物。

4. 忘了调味酱：酱油、蚝油、鱼露、鸡精块、方便面调料和腌菜，几勺就可能含一天的钠，这在很多东亚家庭厨房里尤其重要；更好的做法：用减盐版本、量着用而不是倒、在餐桌上加而不是整个烹饪过程都加。

Mistakes 5–6: the potassium side of the equation

5. Eating too few vegetables, fruit and legumes. Potassium helps the body excrete sodium and relaxes blood vessels. The DASH pattern, rich in vegetables, fruit, legumes, nuts, whole grains and low-fat dairy, lowered systolic blood pressure by about 11 mmHg in people with hypertension (Appel et al., NEJM, 1997). Instead: aim for half your plate as vegetables and add beans or lentils several times a week (see Mediterranean vs DASH vs low-carb).

6. Switching to a salt substitute, or taking potassium, without checking. Potassium-enriched salt substitutes can help: in the SSaSS trial of nearly 21,000 people in rural China, they reduced stroke by 14% and major cardiovascular events by 13% (Neal et al., NEJM, 2021). But for people on ACE inhibitors, ARBs or spironolactone, or with reduced kidney function, extra potassium can be dangerous (see the medication-nutrient map). Instead: ask your doctor or pharmacist before switching.

误区 5–6：钾的那一面：

5. 蔬菜、水果和豆类吃得太少：钾帮助身体排出钠并放松血管；富含蔬菜、水果、豆类、坚果、全谷物和低脂乳制品的 DASH 饮食，让高血压患者收缩压降低约 11 mmHg；更好的做法：半盘蔬菜，每周几次加入豆子或扁豆。

6. 没有核对就换低钠盐或补钾：含钾低钠盐可能有帮助——中国农村近 2.1 万人的 SSaSS 试验中，卒中减少 14%、主要心血管事件减少 13%（NEJM 2021）；但服用 ACE 抑制剂、ARB 或螺内酯，或肾功能下降的人，额外的钾可能有危险；更好的做法：换之前先问医生或药剂师。

Mistakes 7–10: drinks, weight and surprises

7. Drinking more than you think. Regular alcohol raises blood pressure, and cutting back lowers it, especially in people drinking more than two drinks a day (Roerecke et al., Lancet Public Health, 2017). Instead: keep alcohol modest, or choose alcohol-free days.

8. Letting weight creep up. Each kilogram lost lowered systolic pressure by about 1 mmHg in a meta-analysis (Neter et al., Hypertension, 2003). Instead: small, steady changes in portions and activity add up.

9. Black licorice and some herbal products. Real licorice contains glycyrrhizin, which can raise blood pressure and lower potassium, sometimes significantly. Instead: avoid regular black licorice and check herbal teas and supplements with your pharmacist.

10. Grapefruit with certain medicines, and expecting food to replace pills. Grapefruit can raise levels of some blood pressure medicines, such as felodipine, and other heart medicines. And diet works best alongside, not instead of, prescribed treatment. Instead: ask your pharmacist about grapefruit, and keep taking your medicines while you improve your diet.

误区 7–10：饮品、体重和意想不到的食物：

7. 喝得比自己以为的多：经常饮酒会升高血压，减少饮酒能降低血压，尤其每天超过两杯的人（Lancet Public Health 2017）；更好的做法：适度饮酒或安排无酒日。

8. 让体重慢慢增加：荟萃分析中，每减重 1 公斤，收缩压约降 1 mmHg（Hypertension 2003）；更好的做法：在份量和活动上做小而持续的改变。

9. 黑甘草和部分草本产品：真正的甘草含甘草酸，可能明显升高血压、降低血钾；更好的做法：避免经常吃黑甘草，草本茶和补充剂请药剂师核对。

10. 葡萄柚与某些药物同用，以及指望饮食替代药物：葡萄柚可能升高部分降压药（如非洛地平）和其他心脏药物的血药浓度；饮食最好是与处方治疗并行，而不是替代；更好的做法：问药剂师能否吃葡萄柚，改善饮食的同时继续服药。

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The bottom line

If your blood pressure won't budge, look past the salt shaker: everyday staples, sauces, too little potassium, alcohol, slow weight gain and a few surprising foods are the usual culprits. Fix two or three of these at a time, check salt substitutes and herbal products with your pharmacist, keep taking your medicines and measure at home to see what's working.

结论： 如果血压怎么也降不下来，别只盯着盐瓶：日常主食、调味酱、钾太少、饮酒、体重慢慢增加和几种意想不到的食物，通常才是原因。每次改两三项，低钠盐和草本产品先请药剂师核对，继续服药，并在家测量血压，看看哪些改变有效。

Frequently asked questions

Why is my blood pressure still high when I don't add salt? Most sodium comes from packaged, restaurant and prepared foods, such as bread, cheese, deli meats, soups and sauces, rather than the salt shaker. Low potassium intake, alcohol and weight gain also keep blood pressure up.

Is sea salt or pink salt better for blood pressure? Not meaningfully. Gram for gram they contain about the same sodium as table salt; using less salt of any kind is what matters.

Are salt substitutes safe with blood pressure medicine? They can lower blood pressure and cardiovascular risk, but potassium-based substitutes can be dangerous for people on ACE inhibitors, ARBs or spironolactone, or with reduced kidney function. Ask your doctor or pharmacist first.

Does alcohol raise blood pressure? Yes. Regular drinking raises blood pressure, and cutting back lowers it, particularly in people who drink more than two drinks a day.

常见问题：

• 不放盐了为什么血压还高？大部分钠来自面包、奶酪、熟食、汤和调味酱等加工和餐馆食品，钾太少、饮酒和体重增加也有影响。

• 海盐或玫瑰盐更好吗？不明显，按克计算钠含量相近，关键是少用盐。

• 吃降压药能用低钠盐吗？低钠盐能降压和降低心血管风险，但服 ACEI、ARB 或螺内酯或肾功能下降者用含钾代盐可能危险，先问医生或药剂师。

• 喝酒会升高血压吗？会，减少饮酒能降低血压，尤其每天超过两杯的人。

References

1. Appel LJ, et al. A clinical trial of the effects of dietary patterns on blood pressure (DASH). New England Journal of Medicine. 1997;336:1117–1124.

2. Neal B, et al. Effect of salt substitution on cardiovascular events and death (SSaSS). New England Journal of Medicine. 2021;385:1067–1077.

3. Roerecke M, et al. The effect of a reduction in alcohol consumption on blood pressure: a systematic review and meta-analysis. Lancet Public Health. 2017;2(2):e108–e120.

4. Neter JE, et al. Influence of weight reduction on blood pressure: a meta-analysis of randomized controlled trials. Hypertension. 2003;42(5):878–884.