追加:第 2 节第 26 条(咖啡)补喝的时间和每日咖啡因上限 · 核实记录(2026-10-12)
任务来源:读者建议两点:咖啡放在中午前喝,总量按咖啡因不超过 400 mg 算,不按杯数。依据论文 Wang X, Ma H, Sun Q, et al. Eur Heart J 2025;46(8):749-759,PMID 39776171。
原有覆盖:第 2 节第 26 条只写「每天 3–4 杯」,没有时间,也没有毫克。第 3 节第 4 条(下午两点以后不碰咖啡因)讲睡眠,没有死亡率口径。
落点:改第 2 节第 26 条本身,不新增条目,不动条号。标题改成「健康成人喝咖啡放在上午,每天咖啡因总量不超过 400 mg,不加糖不加奶盖」,删了「每天喝三到四杯」。原因是按各官方表折算,8 盎司一杯的 3–4 杯约 284 到 540 mg,高的一端已超过 400 mg。「咖啡」两个字还在,节首引言同步改了,check-refs 通过。
文献(数字取自 Europe PMC / PMC 全文与官方机构页面原文)
| 来源 | 复核 | 关键数字原文 |
|---|---|---|
| Wang X, Ma H, Sun Q, Li J, Heianza Y, Van Dam RM, Hu FB, Rimm E, Manson JE, Qi L. Eur Heart J 2025;46(8):749-759,PMID 39776171,PMC11843000。https://doi.org/10.1093/eurheartj/ehae871 | 是(作者列表以 Europe PMC 与 Crossref 为准,通讯作者 Qi L 即 Lu Qi) | 「Of the 40 725 participants in NHANES, 36% (n = 14 643) were identified as having a morning-type pattern, 16% (n = 6489) were identified as having an all-day-type pattern, and 48% (n = 19 593) were non-coffee drinkers.」「morning (from 4 a.m. to 11:59 a.m.)」「(HR: .88; 95% CI: .81–.96) ... all-day-type pattern (HR: .99; 95% CI: .90–1.10)」「(HR: .84; 95% CI: .74–.95 for morning-type pattern and HR: .96; 95% CI: .83–1.12 for all-day-type pattern」「lower risk of CVD-specific mortality (HR: .69; 95% CI: .55–.87) but not with cancer mortality (HR: .97; 95% CI: .75–1.25)」;Table 2 主模型 CVD 一行「.81 (.70–.94) | .96 (.79–1.16)」;局限性「First, given the observational nature of the study, the associations observed cannot be interpreted as causality.」 |
| Poole R, et al. BMJ 2017;359:j5024。https://doi.org/10.1136/bmj.j5024;更正 BMJ 2018;360:k194。https://doi.org/10.1136/bmj.k194 | 是(PMC 全文仍是更正前版本) | 摘要「largest relative risk reduction at intakes of three to four cups a day versus none, including all cause mortality (relative risk 0.83 (95% confidence interval 0.79 to 0.88)」;正文「the highest exposure category (seven cups a day) ... (relative risk 0.90, 95% confidence interval 0.85 to 0.96)」「the largest reduction in relative risk was associated with the consumption of three cups a day」;「increase in consumption beyond this intake does not seem to be associated with increased risk of harm, rather the magnitude of the benefit is reduced」;「Coffee drinking seems safe within usual patterns of consumption, except during pregnancy and in women at increased risk of fracture」;更正「the relative risk should read 0.83 (95% confidence interval 0.79 to 0.88) rather than the current 0.83 (0.83 to 0.88)」;「There is no universally recognised standard coffee cup size」;「a caffeine intake of 400 mg/day (about four cups of coffee)」 |
| EFSA (2015). Scientific Opinion on the safety of caffeine. EFSA Journal 13(5):4102。https://doi.org/10.2903/j.efsa.2015.4102;专题页 https://www.efsa.europa.eu/en/topics/topic/caffeine | 是(专题页原文本机 curl 取到;意见全文被 Cloudflare 拦截,只核对了摘要) | 摘要「Habitual caffeine consumption up to 400 mg per day does not give rise to safety concerns for non-pregnant adults.」「Single doses of caffeine up to 200 mg (about 3 mg/kg bw for a 70-kg adult) do not give rise to safety concerns.」「Habitual caffeine consumption up to 200 mg per day by pregnant women does not give rise to safety concerns for the fetus.」;专题页「Intakes up to 400mg per day (about 5.7mg/kg bw per day) consumed throughout the day do not raise safety concerns for healthy adults in the general population, except pregnant women.」「An espresso (60ml) 80mg A cup of filter coffee (200ml) 90mg ... All figures are approximate as caffeine content and portion sizes vary within and between countries」 |
| FDA. Spilling the Beans: How Much Caffeine Is Too Much?(页面标注 Content current as of 08/28/2024)。https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much | 是(本机 curl 取到) | 「For most adults, the FDA has cited 400 milligrams* a day — that's about two to three 12-fluid-ounce cups of coffee — as an amount not generally associated with negative effects.」;表「coffee, regular brewed non-specialty | 113 to 247 milligrams」(每 12 液量盎司) |
| Health Canada. Caffeine in foods。https://www.canada.ca/en/health-canada/services/food-nutrition/food-safety/food-additives/caffeine-foods.html(页面 2025-04-02 修改) | 是 | 表 1「Adults (18 years and over) 400 mg People planning to become pregnant 300 mg People who are pregnant 300 mg」;表 2「Brewed 8 oz 237 ml (1 cup) 135 mg」 |
| Liu D, Li ZH, Shen D, et al. Ann Intern Med 2022;175(7):909-917,PMID 35635846。https://doi.org/10.7326/M21-2977 | 是(摘要;全文被拦截) | 无糖咖啡「0.79 (CI, 0.70 to 0.90), 0.84 (CI, 0.74 to 0.95), 0.71 (CI, 0.62 to 0.82), 0.71 (CI, 0.60 to 0.84), and 0.77 (CI, 0.65 to 0.91)」;加糖咖啡「0.91 (CI, 0.78 to 1.07), 0.69 (CI, 0.57 to 0.84), 0.72 (CI, 0.57 to 0.91), 0.79 (CI, 0.60 to 1.06), and 1.05 (CI, 0.82 to 1.36)」;「Moderate consumption of unsweetened and sugar-sweetened coffee was associated with lower risk for death.」 |
| Treskes RW, et al. PLOS ONE 2023;18(10):e0292882。https://doi.org/10.1371/journal.pone.0292882 | 是(摘要,PMC10584177) | 「Hazard ratio of the sugar group compared to the non-sugar group was 1.06 (95% CI 0.98;1.16) for all-cause mortality.」;「Quantity of sugar use was not reported.」 |
| Wong CX, et al. JAMA 2026;335(4):317-325(电子版 2025-11-09,PMC12598581)。https://doi.org/10.1001/jama.2025.21056 | 是 | 「AF or atrial flutter recurrence was less in the coffee consumption (47%) than the coffee abstinence (64%) group, resulting in a 39% lower hazard of recurrence (hazard ratio, 0.61 [95% CI, 0.42-0.89]; P = .01).」;「averaging 1 cup a day」;「it remains possible that some select individuals are truly triggered by coffee.」 |
| Joglar JA, et al. 2023 ACC/AHA/ACCP/HRS Guideline ... Atrial Fibrillation. Circulation 2024;149(1),PMC11095842。https://doi.org/10.1161/CIR.0000000000001193 | 是 | 「For patients with AF, recommending caffeine abstention to prevent AF episodes is of no benefit, although it may reduce symptoms in patients who report caffeine triggers or worsens AF symptoms.」 |
| Yang R, et al. BMC Med 2024;22:526(NHANES 2003–2014,糖尿病人群)。https://doi.org/10.1186/s12916-024-03736-x | 是(摘要与方法) | 「compared with participants without drinking coffee during dawn to forenoon, drinking coffee at this period was associated with increased mortality risk of all-cause (HR 1.25, 95% CI 1.05–1.50) ... In contrast, drinking coffee during forenoon to noon had lower mortality risk of all-cause (HR 0.80, 95% CI 0.69–0.92)」 |
定级与取舍
- 证据等级仍是 A:沿用 Poole 综述的总死亡率结果。上午那一半只有 Wang 一个队列,单独看是 B,备注里写明了「只有一个美国研究」。
- 「上午型」不是「最后一杯在中午前」:论文把一天分成 4:00–11:59、12:00–16:59、17:00–次日 3:59 三段,按各段平均咖啡次数聚类。上午型是咖啡集中在上午、下午和晚上几乎不喝的人。论文没有比较 12 点和 14 点,也没有直接比较上午型和全天型,主文里只有咖啡量与时间模式的交互检验(全因死亡 P = 0.031)。收益栏写上午型和全天型各自对不喝咖啡者的结果。
- 收益栏用主模型 0.88,再并列睡眠调整后的 0.84:摘要里的 0.84 和 0.69 来自再调整睡眠不足和睡眠困难的最高模型,主模型是 0.88 和 0.81。两档都写,免得读者只看到好看的那档。
- 400 mg 是安全上限,不是获益剂量:Poole 摘要写无咖啡因咖啡与总死亡率、心血管死亡也呈有益关联,最大降幅在每天 2–4 杯,幅度与含咖啡因咖啡相近(BMJ 更正后三杯分别是 0.89 与 0.83)。所以好处不跟咖啡因毫克走,标题和收益栏两个口径并列:杯数是研究量出来的,毫克是安全线。EFSA 的 400 mg 要求分散在一天里喝、单次不超过 200 mg,所有来源合计。
- 「杯」不是稳定单位:EFSA 表 200 mL 一杯滤泡咖啡约 90 mg,加拿大卫生部表 8 盎司 135 mg,FDA 表 12 盎司 113–247 mg。FDA 把 400 mg 折成约 2 到 3 杯 12 盎司,Poole 折成约 4 杯,体积上相容,分歧来自杯的容量。
- 孕妇两个数不同:EFSA 每天 200 mg,加拿大卫生部 300 mg。备注两个都写了,没挑一个。
- 改「加糖加奶盖会抵消好处」:Poole 全文没有糖、奶、奶盖相关分析。Liu 2022 摘要只给各档相对不喝的结果,没有加糖对无糖的直接比较,所以不能写「抵消」,也不能写「没差别」。Treskes 2023 直接比较,不显著,但没记糖量,只适用于传统往咖啡里加糖。奶盖没有研究。备注改成「死亡率这一项没有看到加糖会抵消好处,但糖浆和奶盖类饮品没有研究,糖量又大,所以仍然建议不加」。
- 改「心律失常的人不适用」:DECAF 随机试验只测了持续性房颤电复律后、每天约 1 杯,未设盲,阵发性房颤没测。2023 指南的结论是「为预防发作戒咖啡无益」,同时保留「喝了会诱发症状就减」。其他心律失常没有证据,保持「听医生的」。「骨折风险高的女性」是 Poole 点名的例外,原来漏了。「焦虑、失眠」是本书自己的判断,Poole 没有这两类人的结论,备注里写明。
- 改「201 项汇总研究的结果又合到一起算」:Poole 没有重新合并,总死亡率的剂量与效果关系是它引用的一篇汇总分析(正文参考文献 28)。201 项是观察性研究的汇总分析,另有 17 项随机试验的汇总分析,不含死亡率。
- 反方写进备注:BMC Med 2024 只含糖尿病患者,黎明到上午风险比 1.25,上午到中午 0.80。窗口、人群和参照组(该时段不喝的人)都与 Wang 不同,也早于 Wang 发表,不算后续复现,只作为「上午」不是统一好时段的旁证。
- 成本标签「毅力」否改成「些」:新建议要改成上午喝,还要留意一天的毫克数。收益档位沿用「大」,没按 17% 机械套成「中」,与第 24 条全谷物(同为 17%)保持一致。
- 受益人:第①档(你自己)。
没写的
- 瑞幸、星巴克美国官网的咖啡因数据:品牌官网不在书的来源口径里。查到的数字:瑞幸官网大杯冰标准美式 164.3 mg、加浓美式 198.9 mg;星巴克美国官网 Grande(16 盎司)Pike Place 咖啡 315 mg。
- 深圳、福州消委会的现制咖啡测评:只找到媒体转载,没取到消委会原页。
- 中国疾控中心科普稿(福建省卫健委官网转载):写 400 毫克约等于 4 杯美式,早晨喝提神、晚上避免。是科普稿不是标准,也没有「中午」这个时点,不进来源栏。
- WHO 孕期保健建议「超过 300 mg 建议减少」:出处是 BMJ Glob Health 的转录,不是 WHO 官网页,没引。
- 未过滤咖啡升胆固醇、焦虑障碍的激发试验、高血压和脂肪肝终点上加糖看不到好处:都有原始文献,但各自要补限定,加进这一条会让备注超长,没写。
- 没取到:Wang 2025 补充材料;EHJ 同期社论与四篇来信回复的正文(出版社页面拦截);Liu 2022 全文,所以糖量没写;EFSA 2015 意见全文。
校验
node tools/check-plain.mjs:687 条,0 条不合格。第 26 条加--numbers复查,没有收益栏里没有的数字。node tools/check-refs.mjs --check:1422 → 1423 处,多出的一处是备注指向第 3 节第 4 条(下午两点以后不碰咖啡因),带锚点。node tools/check-split.mjs:问题 0 处。node tools/sync-stats.mjs --check:通过。链接数 1816 → 1827。用的是--no-screenshot,没重出 og.png,请本地重出一次。
合并时的调整(2026-10-12,作者定)
- 标题改回保留杯数:「每天喝三到四杯咖啡,咖啡因总量不超过 400 mg,不加糖不加奶盖」。只加字不删字。条目的 A 级靠的是 Poole 每天 3–4 杯 0.83 这个结果;「上午喝」只有 Wang 2025 一个跟踪记录研究,Yang 2024 结果相反,不放进 A 级条目的标题,只留在收益栏和备注。Poole 自己把 400 mg 折成约 4 杯,杯数和上限并不冲突,上限只给大杯封顶。
- 成本标签「毅力」改回「否」,成本栏去掉「改成上午喝」;节首导览改回「每天喝三到四杯咖啡」。