After Stroke: Why the Brain Needs a Different Kind of Antioxidant Support — and What the H2 Evidence Actually Say？ Post-Stroke Neuroprotection: The BBB Antioxidant Block
Oxidative Stress After a Stroke: What the Hydrogen Research Shows
After a stroke, most of the conversation is about what can be seen: weakness, speech, balance. Underneath, a quieter process is at work in the brain cells around the damaged area, and it helps explain why the days and weeks after a stroke matter so much.
Here is the short answer. The brain uses about 20% of the body's oxygen, which makes it especially vulnerable to oxidative stress, and a stroke, followed by restored blood flow, triggers a burst of it. An antioxidant medicine, edaravone, is used for stroke in some countries, and small early studies of molecular hydrogen in stroke patients are encouraging but far from conclusive. The strongest evidence still supports blood pressure control, statins, rehab, sleep and a healthy diet.
简短的答案： 卒中后，大部分讨论集中在看得见的地方：无力、言语、平衡。而在受损区域周围的脑细胞里，一个更安静的过程正在进行，它也解释了为什么卒中后的几天和几周如此关键。
大脑消耗全身约 20% 的氧气，因此特别容易受到氧化应激的伤害，卒中及随后的血流恢复会引发一波氧化应激；在部分国家，抗氧化药物依达拉奉被用于卒中，分子氢在卒中患者中的小型早期研究令人鼓舞但远未定论；证据最强的仍是控制血压、他汀、康复、睡眠和健康饮食。
Why the brain is so vulnerable to oxidative stress
The brain makes up about 2% of body weight but uses about 20% of the body's oxygen (Raichle & Gusnard, PNAS, 2002). All that oxygen use produces reactive oxygen species as a by-product, and brain tissue is rich in fats that are easily damaged by them.
During an ischaemic stroke, a blocked artery starves part of the brain of oxygen; in a typical untreated large stroke about 1.9 million neurons are lost every minute (Saver, Stroke, 2006). When treatment restores blood flow, the returning oxygen brings a burst of oxidative stress, part of what's called reperfusion injury, alongside inflammation that peaks over the following days (see what happens to your brain after a stroke). The same biology of inflammation and oxidative stress links stroke with heart disease (see one inflammation, three hearts).
为什么大脑特别容易受到氧化应激伤害： 大脑约占体重的 2%，却消耗全身约 20% 的氧气（PNAS 2002）；大量用氧会产生活性氧副产物，而脑组织富含容易被它损伤的脂类。
缺血性卒中时，堵塞的动脉让部分大脑缺氧，典型未治疗的大面积卒中每分钟约损失 190 万个神经元（Stroke 2006）；治疗恢复血流时，回流的氧气带来一波氧化应激（属于再灌注损伤的一部分），同时炎症在之后几天达到高峰。炎症与氧化应激这一相同的生物学，把卒中和心脏病联系在一起。
Antioxidant medicines in stroke: what's been tested
Researchers have long tried to protect the brain by targeting oxidative stress:
Edaravone, a free-radical scavenger, has been used for acute stroke in Japan since 2001 and is used in China. It is not approved for stroke in Canada or the United States.
In the TASTE trial in China, a newer combination, edaravone dexborneol, improved 90-day functional outcomes after acute ischaemic stroke compared with edaravone alone (Xu et al., Stroke, 2021).
Many other antioxidant drugs that looked promising in animals have failed in human stroke trials.
The picture is genuinely mixed: oxidative stress matters, but turning that into a reliable treatment has been hard, and timing appears critical.
卒中中的抗氧化药物：测试过什么： 研究者长期尝试通过针对氧化应激来保护大脑：依达拉奉是一种自由基清除剂，自 2001 年起在日本用于急性卒中，在中国也有使用，但在加拿大和美国未获批用于卒中；中国的 TASTE 试验中，较新的复方依达拉奉右莰醇与单用依达拉奉相比，改善了急性缺血性卒中后 90 天的功能结局（Stroke 2021）；许多在动物中看起来有前景的其他抗氧化药物，在人类卒中试验中都失败了。情况确实复杂：氧化应激很重要，但把它变成可靠的治疗很难，而时机似乎至关重要。
Molecular hydrogen and stroke: what the research shows so far
Interest in molecular hydrogen (H₂) began with a 2007 study in rats, which found that inhaled hydrogen selectively neutralised the most damaging free radical, the hydroxyl radical, and reduced brain injury after stroke (Ohsawa et al., Nature Medicine, 2007).
Human studies are still small. In a randomised study of 50 patients with acute cerebral infarction in Japan, hydrogen gas inhalation was safe and was associated with some improvements in imaging and symptom scores (Ono et al., Journal of Stroke and Cerebrovascular Diseases, 2017). Studies of hydrogen-rich water in stroke recovery are earlier still.
What this means: the biology is plausible and the safety profile looks reassuring, but there isn't yet enough evidence to say hydrogen improves stroke outcomes. It isn't a substitute for any stroke treatment (see one molecule, three patients for the wider evidence).
分子氢与卒中：目前的研究： 对分子氢的兴趣始于 2007 年的一项大鼠研究：吸入氢气能选择性中和最具破坏性的自由基——羟自由基，并减轻卒中后的脑损伤（Nature Medicine 2007）。人类研究仍然很小：日本一项纳入 50 名急性脑梗患者的随机研究中，吸入氢气是安全的，并与影像和症状评分的部分改善相关（2017）；富氢水用于卒中康复的研究则更早期。这意味着：生物学机制合理、安全性看起来令人放心，但还没有足够证据表明氢能改善卒中结局，它也不能替代任何卒中治疗。
What has the strongest evidence after a stroke
While antioxidant research continues, the steps with the strongest evidence also lower the brain's oxidative and inflammatory load:
Blood pressure control, usually below about 130/80 (see blood pressure after a stroke).
Statins and clot prevention as prescribed (see stroke medications explained).
Rehabilitation and regular aerobic activity, which also strengthen the body's own antioxidant defences.
Treating sleep apnoea, which repeatedly drops oxygen overnight and is very common after stroke.
A Mediterranean-style eating pattern, not smoking and little or no alcohol.
卒中后证据最强的做法： 在抗氧化研究继续的同时，证据最强的做法同样能减轻大脑的氧化和炎症负担：控制血压，通常目标约低于 130/80；按处方使用他汀和防血栓药物；康复和规律有氧活动，它们也会增强身体自身的抗氧化防御；治疗睡眠呼吸暂停——它会在夜间反复降低血氧，而且在卒中后非常常见；地中海式饮食、不吸烟、少饮酒或不饮酒。
How Healos™ supports stroke recovery
Healos™ stroke plans are built differently from heart plans (see cardiac vs stroke recovery nutrition). The 91-Day Protocol moves through Detox, Replenish and Repair. The Detox stage includes molecular hydrogen water as antioxidant support, alongside nutrients chosen for the brain's needs; it's complementary support, not a stroke treatment. Follow-ups at day 30 and day 60 (with a reminder to book your blood test) and a blood-test report review at day 90 keep progress visible to your stroke team. Every kit is matched to your medication list and runs alongside your rehabilitation and medicines.
Healos™ 如何支持卒中康复： Healos™ 的卒中方案与心脏方案不同。91 天方案依次经过排毒、补给、修复：排毒阶段包含作为抗氧化支持的分子氢水，并配合为大脑需求挑选的营养素；这是辅助支持，不是卒中治疗。第 30 天跟进、第 60 天跟进并提醒验血、第 90 天验血报告解读，让卒中团队看到你的进展。每份营养包都与你的用药清单匹配，并与康复和药物并行。
The bottom line
The brain's heavy use of oxygen makes it unusually sensitive to oxidative stress after a stroke. Antioxidant medicines have shown some benefit in parts of the world, and molecular hydrogen research is encouraging but still early. The everyday steps with the strongest evidence, blood pressure control, prescribed medicines, rehab, sleep and a healthy diet, are also the ones that lower the brain's oxidative load. Start there, and treat newer options as complementary.
结论： 大脑大量用氧，使它在卒中后对氧化应激格外敏感。抗氧化药物在部分地区显示出一定获益，分子氢研究令人鼓舞但仍处早期。证据最强的日常做法——控制血压、按处方用药、康复、睡眠和健康饮食——同样是减轻大脑氧化负担的方法。从这些开始，把较新的选择当作辅助。
Frequently asked questions
Does oxidative stress affect stroke recovery? Yes. The brain uses about 20% of the body's oxygen and is rich in easily damaged fats, so the oxidative stress triggered by a stroke and by restored blood flow contributes to injury in the surrounding tissue.
Is hydrogen water good after a stroke? Early research is encouraging: an animal study showed hydrogen neutralised damaging free radicals, and a small trial of inhaled hydrogen in 50 stroke patients found it safe with some improvements. But the evidence isn't yet enough to say it improves outcomes, and it isn't a substitute for stroke treatment.
What is edaravone? An antioxidant medicine used for acute stroke in Japan and China. A combination form improved 90-day outcomes in a Chinese trial. It isn't approved for stroke in Canada or the United States.
What lowers oxidative stress after a stroke? Blood pressure control, prescribed statins and clot prevention, rehab and regular aerobic activity, treating sleep apnoea, a Mediterranean-style diet and not smoking.
常见问题：
氧化应激影响卒中恢复吗？会，大脑消耗约 20% 的氧气且富含易受损的脂类，卒中和血流恢复引发的氧化应激会损伤周围组织。
中风后喝氢水有用吗？早期研究令人鼓舞，但证据不足以说明能改善结局，也不能替代卒中治疗。
依达拉奉是什么？日本和中国用于急性卒中的抗氧化药物，复方在中国试验中改善 90 天结局，加拿大和美国未获批用于卒中。
什么能降低卒中后氧化应激？控制血压、按处方用他汀和防血栓药、康复与有氧活动、治疗睡眠呼吸暂停、地中海饮食、不吸烟。
References
Raichle ME, Gusnard DA. Appraising the brain's energy budget. PNAS. 2002;99(16):10237–10239.
Saver JL. Time is brain—quantified. Stroke. 2006;37(1):263–266.
Xu J, et al. Edaravone dexborneol versus edaravone alone for the treatment of acute ischemic stroke (TASTE). Stroke. 2021;52(3):772–780.
Ohsawa I, et al. Hydrogen acts as a therapeutic antioxidant by selectively reducing cytotoxic oxygen radicals. Nature Medicine. 2007;13(6):688–694.
Ono H, et al. Hydrogen gas inhalation treatment in acute cerebral infarction: a randomized controlled clinical study on safety and neuroprotection. Journal of Stroke and Cerebrovascular Diseases. 2017;26(11):2587–2594.
