生菜、芝麻菜和其他叶菜中来自化肥的硝酸盐(连同农药)会伤害吃这些菜的人。
原始表述
شويه نترات في اسمده شويه مبيدات حضرتك بيخشوا لك مع الخص والجرجير مع الكونروف مع الورق مع البتاع
按来源为原话. 译文由本项目提供;以阿拉伯语原文为准。
译文
生菜、芝麻菜和其他叶菜中来自化肥的硝酸盐(连同农药)会伤害吃这些菜的人。
出处
- 来源状态
- 视频转录文本(本人原话)
- 归属
- Elawady (machine transcript)
- 视频
- Dr Diaa Al Awady د ضياء العوضي is live! شريحة في الدماغ (打开来源)
- 发布日期
- 2026年2月1日
- 时间戳
- 0:58:14 (在原视频 YouTube 自动字幕轨中的位置;可确认该内容出现的位置,但不能确认说话人是谁)
- 归属的不确定性
- Archive transcript (YouTube captions or AI-generated); wording may contain transcription errors; no timestamps available.
- 所声称的机制
Fertiliser nitrate accumulates in leaves.
- 所声称的健康影响
Toxic effects, methaemoglobinaemia ('green man').
- 涉及人群
Everyone
- Elawady 设定的地域限制
none found
来源版本存在差异
- 来源状态
- 档案网站编辑
- 归属
- Archive editors
- 出处
- https://eltayebat.com/rule/leafy-greens-cucurbits/
- 归属的不确定性
- Archive editorial text and study selection written by the archive operators, not necessarily by Elawady.
科学评估
基本错误 – 该说法的主要部分没有证据支持,或被严重夸大。
证据确定性: 中 – 进一步研究仍可能影响该评估。
1. 说法是什么?
Fertiliser nitrate in greens harms consumers.
2. 哪些内容可证实是正确的?
Leafy greens such as rocket, lettuce and spinach accumulate nitrate, influenced by fertilisation and light; nitrite/nitrate poisoning causing methaemoglobinaemia exists (mainly from contaminated water or infant feeding).
3. 哪些内容是错误或夸大的?
For adults, vegetable nitrate is converted to nitric oxide and lowers blood pressure in trials (Siervo 2013). The EU regulates maximum levels; exceeding a limit is not the same as harm.
4. 哪些内容仍不明确?
Long-term effects of very high vegetable nitrate intakes and on thyroid disease are not established in RCTs.
5. 哪些研究支持该说法?
Weak: Ward 2010 (I-VEG-126), an imprecise association of dietary nitrate with thyroid cancer in one cohort of older women.
6. 哪些研究与该说法相矛盾?
Siervo 2013 (RCTs, blood pressure); Bondonno 2021 (I-VEG-123) and Bondonno 2024 (I-VEG-124): vegetable nitrate associated with lower CVD and mortality; Erichsen 2025 (I-VEG-125): no association of plant nitrate with colorectal cancer; Aune 2017.
7. 对德国和欧洲而言情况如何?
Regulated by EU Reg. 2023/915.
8. 关于埃及的已知情况是什么?
Egyptian nitrate monitoring data were not found.
9. 合理的实际结论是什么?
对成人而言,正常食用绿叶菜不存在硝酸盐风险;婴儿是特殊情况。
评估详情
- 证据确定性的依据
RCTs show that dietary nitrate lowers systolic blood pressure (-4.4 mm Hg, Siervo 2013). Large source-specific cohort analyses now separate vegetable nitrate from other sources: plant-sourced nitrate was associated with lower all-cause mortality (HR 0.83, 0.80-0.87; Bondonno 2024, I-VEG-124) and lower CVD (HR 0.85; Bondonno 2021, I-VEG-123) and was not associated with colorectal cancer (Erichsen 2025, I-VEG-125), whereas nitrate from processed meat and tap water was associated with higher mortality. The only harm signal for dietary nitrate found (thyroid cancer, Ward 2010, I-VEG-126) is imprecise (RR 2.9, 1.0-8.1) and not replicated.
- 来源质量
Machine transcript; mixes fertiliser nitrate, pesticides and a clinical case of nitrite poisoning.
- 地区可推广性
EU maximum levels exist (e.g. fresh spinach 3,500 mg/kg; rocket 6,000-7,000 mg/kg; lettuce 2,000-5,000 mg/kg depending on type and season). Egyptian levels were not reviewed.
- 个体例外情况
Young infants (see C-VEG-07).
- 说法的地域范围
- 普遍性(生物学/医学)
- 最近审核
- 2026年10月26日 初步
科学证据详解
缺乏高质量证据支持 – 没有良好证据支持该说法;但仅凭这一点并不能证明它是错误的。
研究问题: In adults, does nitrate from fertilised leafy vegetables (lettuce, rocket) harm health?
研究问题详解 (PECO)
- 人群
- Adults
- 干预或暴露
- Vegetable nitrate
- 对照
- Low vegetable nitrate
- 地域范围
- universal biology; nitrate content production-dependent
- 结局指标
- blood pressure
- CVD
- mortality
- cancer
- thyroid disease
研究结果按作者报告呈现。我们的评估见下文。
哪些证据支持该说法?
Possible thyroid signal for nitrate in one cohort
Ward 2010 Iowa Women's Health Study.
- 实际结果
- Dietary nitrate Q4 vs Q1: thyroid cancer RR 2.9 (1.0-8.1); hypothyroidism OR 1.2.
- 方法学质量
- low (imprecise, single cohort)
- 相关性
- indirect
- 局限
- Few cases; not replicated.
哪些证据不支持该说法?
Nitrate source matters
Bondonno NP et al.. Eur J Epidemiol 2024 · PMID 38802612 · DOI 10.1007/s10654-024-01133-5 队列研究已核查摘要新增Bondonno 2024 source-specific nitrate (52,247; 27 y).
- 实际结果
- Plant nitrate HR 0.83 (0.80-0.87) all-cause mortality; meat-additive nitrate 1.19 (1.14-1.25).
- 方法学质量
- moderate
- 相关性
- direct
- 局限
- Observational.
Nitrate from vegetables linked to less heart disease
Bondonno CP et al.. Eur J Epidemiol 2021 · PMID 33884541 · DOI 10.1007/s10654-021-00747-3 队列研究已核查摘要新增Bondonno 2021 (53,150; 23 y).
- 实际结果
- Moderate vegetable nitrate CVD HR 0.85 (0.82-0.89); SBP -2.58 mmHg.
- 方法学质量
- moderate
- 相关性
- direct
- 局限
- Observational.
Dietary nitrate and blood pressure
Siervo 2013 meta-analysis of RCTs.
- 实际结果
- Inorganic nitrate/beetroot juice lowers SBP by 4.4 mmHg.
- 方法学质量
- moderate-high (RCT MA, short-term)
- 相关性
- direct (surrogate)
- 局限
- Short trials.
总体证据说明了什么?
基于上述研究的编辑评估——其本身并非研究结果。
哪种观点有更好的证据支持?
For adults, nitrate from vegetables is associated with lower blood pressure, CVD and mortality; harm signals concern nitrate from processed meat and drinking water, not vegetables.
为什么有些研究权重更大
Source-specific cohorts plus RCTs on BP outweigh one imprecise thyroid finding.
因果关系是否已确立? 有可能,尚未确立 BP lowering is causal in RCTs; hard outcomes observational.
仍存在的不确定性
Thyroid signal; very high intakes.
合理的结论
No evidence that vegetable nitrate harms adults; benefit is plausible.
为什么研究结果看起来互相矛盾?
Ward 2010 (thyroid cancer) vs Danish cohorts (no harm, lower mortality): different outcomes, small vs large case numbers; the thyroid signal is imprecise and not replicated.
这是否取决于国家?
- 一般生物学效应
- Universal.
- 饮食习惯
- Rocket (jarjir) and lettuce are common in Egypt.
- 食品原产地
- Nitrate depends on fertiliser, season and light.
- 污染物
- Nitrate is natural, not a contaminant in the usual sense.
- 本国生产条件
- Egyptian nitrate data not reviewed.
- 法律规则
- EU Reg. 2023/915 maximum levels.
- 实际监测数据
- not reviewed
足以改变结论的地区差异没有可靠数据支持。
统计复核
- CI symmetry – Consistent within rounding. 已重新计算
- Precision of thyroid finding – RR 2.9 (1.0-8.1), p ~0.046: imprecise. 已重新计算
总体证据的确定性(GRADE,简化版)
- 主要结局
- CVD and mortality with higher vegetable nitrate in adults
- 起始等级
- 低(观察性研究)
- 升级理由
- dose-response
- consistent with RCT mechanism (BP)
- 结果
- 中
由单名审查者参照 GRADE 方法进行的简化评估;并非正式的 GRADE 专家组评估。GRADE 评价的是针对某一结局的整体证据,而非单项研究。
检索策略
本次审查的文献检索记录(检索式采用原数据库语法)。
| 数据库 | 日期 | 检索式 | 检索目标 | 命中数 | 纳入数 |
|---|---|---|---|---|---|
| PubMed | 2026年10月26日 | (dietary nitrate OR "nitrate intake") AND (vegetable*) AND (cancer OR mortality OR thyroid) AND (meta-analysis[pt] OR cohort) | 支持性证据 | 20 | |
| PubMed | 2026年10月26日 | ("vegetable nitrate" OR "plant-derived nitrate") AND (cardiovascular OR "blood pressure" OR mortality) AND (cohort OR prospective) | 反对性证据 | 6 | |
| PubMed | 2026年10月26日 | (nitrate) AND (source OR plant-sourced OR "animal-sourced") AND (mortality OR cancer) AND ("Danish Diet, Cancer, and Health") | 双向 | 13 |
核查深度如何?
8 项相关研究:2 项核查了全文(其中 1 项进行了结构化偏倚风险评估),6 项基于摘要核查,0 项仅核查了文献信息。 尚未进行由两名独立审查者完成的正式评估,也尚未进行独立的人类专家审核。
最近一次科学审核: 2026年10月26日
评定结论的变更历史
- 2026年10月25日 · 第 1 阶段 · 初始评估: 基本错误 (低)
- 2026年10月26日 · 第 4 阶段(系统证据审查) · 评定结论已更改: 基本错误 (低) → 基本错误 (中)
Source-specific cohort analyses (Bondonno 2021, 2024; Erichsen 2025) now separate vegetable nitrate (inverse association) from processed-meat and water nitrate (positive association), resolving the main uncertainty cited in the previous rationale. Certainty raised from low to moderate; verdict unchanged.
新来源: I-VEG-123 I-VEG-124 I-VEG-125 I-VEG-126
通俗解释
Elawady 说,化肥中的硝酸盐和农药会随着生菜和芝麻菜进入人体。叶类蔬菜确实含有硝酸盐,欧盟为此设定了限量。在成人体内,来自蔬菜的硝酸盐会转化为一种能舒张血管的物质,试验显示血压会小幅下降。真正的风险针对的是很小的婴儿。
与该说法相关的研究
支持该说法的研究 (1)
-
Possible thyroid signal for nitrate in one cohort
Ward MH et al.. Epidemiology 2010 · PMID 20335813 · DOI 10.1097/EDE.0b013e3181d6201d队列研究独立交叉核查已核查摘要In Iowa women, the highest dietary nitrate intake was linked to more thyroid cancer, but the estimate was very imprecise.
Imprecise association of dietary nitrate with thyroid cancer in one cohort.
该研究是否支持这一具体说法? 部分支持 · 方法学质量: 低 · 证据确定性:见该说法的总体评估
研究通俗解读
- 研究人员想了解什么?
Relate nitrate to thyroid outcomes.
- 研究是如何开展的?
Cohort.
- 研究了多少人、动物或样本?
21,977 women.
- 实际发现了什么?
Weak positive association.
- 观察到的效应有多大?
RR 2.9 (1.0-8.1).
- 研究结果对日常生活意味着什么?
A possible signal needing confirmation, not proof of harm.
- 该研究有哪些局限?
Few cases.
- 它对 Elawady 的具体说法说明了什么?
Weak support.
- 研究结果是否适用于德国和欧洲?
Moderate.
- 从该研究中明确不能得出什么结论?
Cannot show that vegetables harm the thyroid.
该组中没有被标记为关键研究的研究。
与该说法相矛盾或限制该说法的研究 (6)
-
Dietary nitrate and blood pressure
Siervo M et al.. J Nutr 2013 · PMID 23596162 · DOI 10.3945/jn.112.170233Meta分析独立交叉核查已核查摘要★ 关键研究Nitrate from beetroot juice lowered systolic blood pressure by about 4 mm Hg in short trials.
该研究是否支持这一具体说法? 否 · 方法学质量: 中 · 证据确定性:见该说法的总体评估
研究通俗解读
- 研究人员想了解什么?
Nitrate and BP
- 研究是如何开展的?
Meta-analysis of RCTs
- 研究了多少人、动物或样本?
254
- 实际发现了什么?
Lower systolic BP
- 观察到的效应有多大?
-4.4 mm Hg
- 研究结果对日常生活意味着什么?
Vegetable nitrate may benefit BP.
- 该研究有哪些局限?
Short
- 它对 Elawady 的具体说法说明了什么?
Contradicts harm claim
- 研究结果是否适用于德国和欧洲?
High
- 从该研究中明确不能得出什么结论?
Cannot show long-term outcomes.
-
EU nitrate limits for leafy vegetables
European Commission. Official document 2023指南 / 立场声明独立交叉核查已核查全文★ 关键研究The EU caps nitrate in spinach, lettuce and rocket and sets a much lower limit for baby food.
该研究是否支持这一具体说法? 否 · 方法学质量: 中 · 证据确定性:见该说法的总体评估
研究通俗解读
- 研究人员想了解什么?
Set limits
- 研究是如何开展的?
Regulation
- 研究了多少人、动物或样本?
Not applicable
- 实际发现了什么?
Limits per product
- 观察到的效应有多大?
Not applicable
- 研究结果对日常生活意味着什么?
Nitrate in EU greens is controlled.
- 该研究有哪些局限?
Limits are not health thresholds per se
- 它对 Elawady 的具体说法说明了什么?
Regulatory context
- 研究结果是否适用于德国和欧洲?
High
- 从该研究中明确不能得出什么结论?
Cannot show harm or safety at individual level.
-
Fruit, vegetables and death rates
Aune D et al.. Int J Epidemiol 2017 · PMID 28338764 · DOI 10.1093/ije/dyw319Meta分析独立交叉核查全文,含结构化偏倚风险评估★ 关键研究Each extra 200 g of fruit and vegetables a day was linked to 10% lower death risk; green leafy vegetables and salads were also protective.
该研究是否支持这一具体说法? 否 · 方法学质量: 高 · 证据确定性:见该说法的总体评估
研究通俗解读
- 研究人员想了解什么?
F&V and outcomes
- 研究是如何开展的?
Meta-analysis
- 研究了多少人、动物或样本?
95 studies
- 实际发现了什么?
Lower CVD, cancer, mortality
- 观察到的效应有多大?
RR 0.90 per 200 g
- 研究结果对日常生活意味着什么?
Eat plenty of vegetables.
- 该研究有哪些局限?
Observational
- 它对 Elawady 的具体说法说明了什么?
Contradicts avoidance
- 研究结果是否适用于德国和欧洲?
High
- 从该研究中明确不能得出什么结论?
Cannot prove causation.
-
Nitrate from vegetables linked to less heart disease
Bondonno CP et al.. Eur J Epidemiol 2021 · PMID 33884541 · DOI 10.1007/s10654-021-00747-3队列研究独立交叉核查已核查摘要★ 关键研究Danes eating about a cup of leafy greens' worth of nitrate daily had 15% less cardiovascular disease than those eating the least.
Vegetable nitrate associated with lower BP and CVD.
该研究是否支持这一具体说法? 否 · 方法学质量: 中 · 证据确定性:见该说法的总体评估
研究通俗解读
- 研究人员想了解什么?
Relate vegetable nitrate to BP and CVD.
- 研究是如何开展的?
Cohort, 23 years.
- 研究了多少人、动物或样本?
53,150 adults.
- 实际发现了什么?
Lower BP and CVD with moderate intake.
- 观察到的效应有多大?
HR 0.85 (0.82-0.89).
- 研究结果对日常生活意味着什么?
Nitrate from greens does not appear harmful for adults; it may be protective.
- 该研究有哪些局限?
Observational.
- 它对 Elawady 的具体说法说明了什么?
Contradicts the claim.
- 研究结果是否适用于德国和欧洲?
European.
- 从该研究中明确不能得出什么结论?
Cannot prove causation.
-
Nitrate source matters
Bondonno NP et al.. Eur J Epidemiol 2024 · PMID 38802612 · DOI 10.1007/s10654-024-01133-5队列研究独立交叉核查已核查摘要★ 关键研究Nitrate from plants was linked to 17% lower mortality, whereas nitrate from processed meat and tap water was linked to higher mortality.
Plant-sourced nitrate inversely associated with mortality; harm signals from meat/water nitrate.
该研究是否支持这一具体说法? 否 · 方法学质量: 中 · 证据确定性:见该说法的总体评估
研究通俗解读
- 研究人员想了解什么?
Compare nitrate sources and mortality.
- 研究是如何开展的?
Cohort, 27 years.
- 研究了多少人、动物或样本?
52,247 adults.
- 实际发现了什么?
Plant nitrate inverse; meat/water nitrate positive.
- 观察到的效应有多大?
HR 0.83 (0.80-0.87) plant.
- 研究结果对日常生活意味着什么?
Nitrate in vegetables is not the nitrate to worry about.
- 该研究有哪些局限?
Observational.
- 它对 Elawady 的具体说法说明了什么?
Contradicts the claim.
- 研究结果是否适用于德国和欧洲?
European.
- 从该研究中明确不能得出什么结论?
Cannot prove causation.
-
Vegetable nitrate not linked to bowel cancer
Erichsen DW et al.. Environ Int 2025 · PMID 40628182 · DOI 10.1016/j.envint.2025.109658队列研究独立交叉核查已核查摘要In 54,610 Danes, nitrate from vegetables was not linked to colorectal cancer; high nitrate in tap water was linked to distal colon cancer.
No association of plant-sourced nitrate with colorectal cancer.
该研究是否支持这一具体说法? 否 · 方法学质量: 中 · 证据确定性:见该说法的总体评估
研究通俗解读
- 研究人员想了解什么?
Relate nitrate sources to bowel cancer.
- 研究是如何开展的?
Cohort.
- 研究了多少人、动物或样本?
54,610 adults.
- 实际发现了什么?
Food nitrate null; tap water positive.
- 观察到的效应有多大?
HR 1.48 tap water.
- 研究结果对日常生活意味着什么?
Vegetable nitrate is not a bowel-cancer risk in this cohort.
- 该研究有哪些局限?
Observational; subgroups.
- 它对 Elawady 的具体说法说明了什么?
Contradicts the claim.
- 研究结果是否适用于德国和欧洲?
European.
- 从该研究中明确不能得出什么结论?
Cannot exclude small effects.
该组中没有被标记为关键研究的研究。
结果不一或不明确的研究 (1)
-
Courgette soup poisoning in two babies
Savino F et al.. Ann Nutr Metab 2006 · PMID 16809905 · DOI 10.1159/000094301病例系列 / 病例报告被 Tayebat 档案网站引用已核查摘要Two infants under 3 months developed methaemoglobinaemia from concentrated courgette soup.
该研究是否支持这一具体说法? 部分支持 · 方法学质量: 低 · 证据确定性:见该说法的总体评估
研究通俗解读
- 研究人员想了解什么?
Report cases
- 研究是如何开展的?
Case report
- 研究了多少人、动物或样本?
2 infants
- 实际发现了什么?
Methaemoglobinaemia
- 观察到的效应有多大?
30.4% and 27%
- 研究结果对日常生活意味着什么?
Don't give vegetable broths to young infants.
- 该研究有哪些局限?
Two cases
- 它对 Elawady 的具体说法说明了什么?
Infant-specific
- 研究结果是否适用于德国和欧洲?
High
- 从该研究中明确不能得出什么结论?
Cannot show harm in adults.
该组中没有被标记为关键研究的研究。
地区背景
德国 / 欧盟
Regulated by EU Reg. 2023/915.
埃及
Egyptian nitrate monitoring data were not found.
- Food-safety governance and official controls
- Pesticide residues in fruit and vegetables on the EU/German market (incl. imports from Egypt)
- Pesticide residues in produce sold on the Egyptian domestic market
- Antibiotic (veterinary drug) residues in poultry meat and eggs
- Antimicrobial use in food animals and antibiotic growth promoters
- Hormones in poultry, meat, milk and farmed fish
- Dioxins, PCBs and PFAS in eggs and other animal foods
- Aflatoxin M1 in milk and dairy products
- Aflatoxins in groundnuts (peanuts)
- Heavy metals in fish
- Farmed fish (aquaculture): drugs, water source and controls
- Nitrate in leafy vegetables
- Microbiological safety of fresh produce, herbs and spices
- Import controls and the meaning of RASFF notifications for Egyptian products
在我的国家适用什么?
一般科学评估
基本错误 对成人而言,没有证据表明蔬菜中的硝酸盐有害;与来自加工肉类或受污染水的硝酸盐不同,它与较低的血压和死亡率相关。
以下食品安全领域与该说法相关:
- 农药与农药残留
- 兽药与抗生素
- 激素类促生长剂
- 污染物(重金属、PFAS、PCB、二噁英、硝酸盐)
- 病原体(沙门氏菌、弯曲杆菌等)
蛋类 · 禽类 · 乳制品 · 鱼类与海产品 · 红肉 · 水果与蔬菜
选择一个国家,查看针对该国已核查的信息。
局限:法律规则描述的是允许什么,而不是每一种食品实际含有什么。检测数据来自样本,只有结合其方法细节才有意义。
参考文献
- Nitrate intake and the risk of thyroid cancer and thyroid disease.. Ward MH et al.. Epidemiology 2010 · PMID 20335813 · DOI 10.1097/EDE.0b013e3181d6201d
- Inorganic nitrate and beetroot juice supplementation reduces blood pressure in adults: a systematic review and meta-analysis.. Siervo M et al.. J Nutr 2013 · PMID 23596162 · DOI 10.3945/jn.112.170233
- Commission Regulation (EU) 2023/915 on maximum levels for certain contaminants in food (Annex I, section 6.1 Nitrates). European Commission. Official document 2023
- Fruit and vegetable intake and the risk of cardiovascular disease, total cancer and all-cause mortality-a systematic review and dose-response meta-analysis of prospective studies.. Aune D et al.. Int J Epidemiol 2017 · PMID 28338764 · DOI 10.1093/ije/dyw319
- Vegetable nitrate intake, blood pressure and incident cardiovascular disease: Danish Diet, Cancer, and Health Study.. Bondonno CP et al.. Eur J Epidemiol 2021 · PMID 33884541 · DOI 10.1007/s10654-021-00747-3
- Source-specific nitrate intake and all-cause mortality in the Danish Diet, Cancer, and Health Study.. Bondonno NP et al.. Eur J Epidemiol 2024 · PMID 38802612 · DOI 10.1007/s10654-024-01133-5
- Source-specific nitrate and nitrite intake and association with colorectal cancer in the Danish Diet, Cancer and Health Cohort.. Erichsen DW et al.. Environ Int 2025 · PMID 40628182 · DOI 10.1016/j.envint.2025.109658
- Methemoglobinemia caused by the ingestion of courgette soup given in order to resolve constipation in two formula-fed infants.. Savino F et al.. Ann Nutr Metab 2006 · PMID 16809905 · DOI 10.1159/000094301