羧甲基纤维素等工业乳化剂会侵蚀肠道的保护性黏液层，并促发炎症和代谢性疾病。
原始表述
والآليات لم تعد سرّاً: المستحلبات الصناعية كالكاربوكسي ميثيل سلولوز تُمزّق طبقة المخاط الواقية للأمعاء (Chassaing 2015 Nature).
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
羧甲基纤维素等工业乳化剂会侵蚀肠道的保护性黏液层，并促发炎症和代谢性疾病。
出处
- 来源状态
- 档案网站编辑
- 归属
- Archive editors (study selection and narrative are the archive's, not necessarily Elawady's)
- 出处
- https://eltayebat.com/rule/ultra-processed-foods/
- 归属的不确定性
- The archive homepage states that the forbidden-food section is supported by research 'independently of Dr. Diaa's words'. No evidence was found that Elawady himself cited these studies.
- 所声称的机制
Microbiota encroachment into mucus, low-grade inflammation.
- 所声称的健康影响
Colitis, metabolic syndrome, CVD, T2D.
- 涉及人群
Humans (extrapolated from mice)
- Elawady 设定的地域限制
none found
科学评估
不明确 / 证据不足 – 现有数据无法支持任何方向的评估。
证据确定性: 低 – 进一步研究很可能大幅改变该评估。
1. 说法是什么？
Emulsifiers damage the gut barrier and cause disease.
2. 哪些内容可证实是正确的？
In mice, CMC and polysorbate 80 thinned the mucus layer, caused low-grade inflammation and metabolic syndrome, and colitis in susceptible strains (A-UPF-15). In a small human trial, 15 g/day CMC altered gut bacteria and metabolites (A-UPF-16). Some emulsifiers were associated with slightly more CVD and type 2 diabetes in a French cohort (I-UPF-04, I-UPF-05).
3. 哪些内容是错误或夸大的？
Mucus erosion and inflammation are shown in mice, not in humans at usual intake. In a double-blind trial in people with active Crohn's disease, a high-emulsifier diet did not worsen disease activity compared with a low-emulsifier diet (I-UPF-114). In healthy adults a high-emulsifier diet caused no inflammation; gut permeability was lower at rest but higher under acute stress (I-UPF-113). The cohort associations are small (HRs about 1.03-1.11) and observational. 'Drive inflammation and metabolic disease' therefore overstates the human evidence.
4. 哪些内容仍不明确？
Long-term effects of specific emulsifiers (e.g. CMC, polysorbate 80) at high intake, and effects in susceptible individuals.
5. 哪些研究支持该说法？
A-UPF-15 (mice), A-UPF-16 (small human trial), I-UPF-04 and I-UPF-05 (cohort associations); I-UPF-113 partly (higher permeability under stress).
6. 哪些研究与该说法相矛盾？
Fitzpatrick 2025 (I-UPF-114): no effect of emulsifier content on Crohn's disease activity over 4 weeks; Fitzpatrick 2024 (I-UPF-113): no inflammation in healthy adults; EFSA 2018 (I-UPF-121): no safety concern for celluloses including CMC at reported uses.
7. 对德国和欧洲而言情况如何？
EFSA has re-evaluated many emulsifiers; they remain authorised with conditions of use; regulators have not concluded on these newer findings in this review.
8. 关于埃及的已知情况是什么？
No Egypt-specific data.
9. 合理的实际结论是什么？
出于其他原因，限制深度加工的食品是合理的，但尚未显示避免乳化剂能够预防或治疗人类的疾病。
评估详情
- 证据确定性的依据
Strong mouse experiments (A-UPF-15) and a tiny 11-day human trial with a high CMC dose (A-UPF-16) suggest harm; small cohort associations exist (I-UPF-04, I-UPF-05). However, two controlled human feeding trials at food-supply emulsifier levels found no gut inflammation in healthy adults (I-UPF-113) and no worsening of active Crohn's disease over 4 weeks (I-UPF-114), and EFSA found no safety concern for celluloses including CMC at reported uses (I-UPF-121). Human trials are small and short.
- 来源质量
The archive generalises a mouse finding to humans ('mechanisms are no longer mysterious').
- 地区可推广性
High for EU: CMC (E466) and other emulsifiers are authorised under Reg. 1333/2008.
- 个体例外情况
Not applicable.
- 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
过度解读 – 确有真实的发现，但该说法从中引申出的结论超出了数据所能支持的范围（例如把关联当作因果、把动物数据套用到人身上、把小效应说成大效应）。
研究问题: In humans, do dietary emulsifiers such as carboxymethylcellulose, at usual intake, erode the intestinal mucus layer and cause intestinal inflammation and metabolic disease?
研究问题详解 (PICO)
- 人群
- Humans (healthy and with Crohn's disease); animal models as background
- 干预或暴露
- Dietary emulsifiers (CMC, polysorbate 80, others)
- 对照
- Low-emulsifier diet / placebo
- 地域范围
- universal biology
- 结局指标
- Gut barrier and mucus
- Intestinal inflammation / disease activity
- Cardiometabolic 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？
Emulsifiers and gut inflammation in mice
Mouse study: CMC and P80 thinned mucus, caused low-grade inflammation, colitis (susceptible mice) and metabolic syndrome.
- 实际结果
- Bacteria-epithelium distance reduced >50%.
- 方法学质量
- high-quality animal study
- 相关性
- very indirect (mice)
- 局限
- Doses 0.1-1% of diet.
Emulsifier CMC in a small human trial
Chassaing B et al.. Gastroenterology 2022 · PMID 34774538 · DOI 10.1053/j.gastro.2021.11.006 随机对照试验已核查摘要Human feeding RCT: 15 g/day CMC altered microbiota and metabolome; encroachment in 2 of 7.
- 实际结果
- n=16; 11 days.
- 方法学质量
- low (tiny, short, high dose)
- 相关性
- direct
Emulsifiers and heart disease in France
NutriNet-Sante: some emulsifiers associated with CVD.
- 实际结果
- Per SD HRs 1.03-1.08.
- 方法学质量
- moderate (cohort)
- 相关性
- indirect
- 局限
- Small; several not significant after FDR.
哪些证据不支持该说法？
Emulsifiers in people with Crohn's disease
Fitzpatrick JA et al.. Aliment Pharmacol Ther 2025 · PMID 39967287 · DOI 10.1111/apt.70041 随机对照试验已核查摘要新增Double-blind RCT in active Crohn's disease: high vs low emulsifier diet made no difference over 4 weeks.
- 实际结果
- Remission 9/12 vs 7/12; no significant differences.
- 方法学质量
- moderate (small exploratory RCT)
- 相关性
- direct (most susceptible group)
- 局限
- n=24; 4 weeks.
Emulsifiers and the gut barrier in healthy people
Fitzpatrick JA et al.. Aliment Pharmacol Ther 2024 · PMID 39072856 · DOI 10.1111/apt.18172 随机对照试验已核查摘要新增RCT in healthy adults: high-emulsifier diet caused no inflammation; barrier better at rest, more permeable under stress.
- 实际结果
- LRR 0.030 vs 0.042 at rest.
- 方法学质量
- moderate
- 相关性
- direct
- 局限
- n=22; surrogate.
EU safety review of cellulose additives (including CMC)
EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS) et al.. EFSA J 2018 · PMID 32625652 · DOI 10.2903/j.efsa.2018.5047 风险评估已核查摘要新增EFSA 2018: no safety concern for celluloses including CMC at reported uses.
- 实际结果
- No toxicity at high doses in animals.
- 方法学质量
- high (regulatory)
- 相关性
- indirect
- 局限
- Microbiome endpoints not decisive.
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？
Clear harm in mice; in humans, small controlled trials at realistic intakes found no inflammation or worsening of Crohn's disease, while cohort data show small associations.
为什么有些研究权重更大
Direct human RCTs at realistic intake weigh more than mouse experiments for the human claim, but they are small and short.
因果关系是否已确立？ 尚未确立 Animal → human extrapolation not confirmed in human trials.
仍存在的不确定性
Long-term effects; specific emulsifiers (CMC, P80) at high intake; susceptible individuals.
合理的结论
Plausible concern, not established human harm at usual intake.
为什么研究结果看起来互相矛盾？
Mice (high dose, specific emulsifiers, weeks) vs human feeding trials (food-supply levels, mixtures, 4 weeks): different doses, species and endpoints.
这是否取决于国家？
- 一般生物学效应
- Gut biology similar, but mouse-to-human transfer uncertain.
- 饮食习惯
- Emulsifier intake depends on UPF consumption.
- 食品原产地
- Not relevant.
- 污染物
- Not relevant.
- 本国生产条件
- Formulations differ.
- 法律规则
- CMC (E 466) authorised in EU (I-UPF-121); Egyptian status not verified.
- 实际监测数据
- None.
足以改变结论的地区差异没有可靠数据支持。
统计复核
- Power – Exploratory n=24; differences not significant; no recalculation possible from abstract. 无法根据已发表数据重新计算
总体证据的确定性（GRADE，简化版）
- 主要结局
- Intestinal inflammation from emulsifiers at usual intake in humans
- 起始等级
- 高（随机试验）
- 降级理由
- imprecision (small trials)
- indirectness (short duration; animal data)
- 结果
- 低
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 |
|---|---|---|---|---|---|
| Europe PMC | 2026年10月26日 | (TITLE:emulsifier* OR TITLE:carboxymethylcellulose OR TITLE:polysorbate) AND (TITLE:human OR TITLE:randomized OR TITLE:randomised OR TITLE:trial OR TITLE:"Crohn" OR TITLE:diet) AND PUB_YEAR:[2020 TO 2026] | 双向 | 55 | |
| Europe PMC | 2026年10月26日 | (TITLE:"re-evaluation" OR TITLE:"reevaluation") AND (TITLE:cellulose OR TITLE:"E 466" OR TITLE:polysorbates OR TITLE:"E 433") AND JOURNAL:"EFSA J" | 反对性证据 | 3 |
核查深度如何？
7 项相关研究：2 项核查了全文（其中 2 项进行了结构化偏倚风险评估），5 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: 可能正确 (低)
- 2026年10月26日 · 第 4 阶段（系统证据审查） · 评定结论已更改: 可能正确 (低) → 不明确 / 证据不足 (低)
Two direct human RCTs (healthy adults and Crohn's disease) at realistic food-supply emulsifier levels found no inflammation or disease worsening, and EFSA found no safety concern for CMC. Previously the review stated that no contradicting evidence existed; with direct null human trials, the balance moves from 'plausibly true' to 'unclear'.
新来源: I-UPF-113 I-UPF-114 I-UPF-121
通俗解释
在小鼠中，两种常见的乳化剂损害了肠道的保护层，并引起炎症和体重增加。在人体中，证据则不同：在小型、严格对照的试验中，正常剂量的乳化剂没有使健康成年人的肠道发炎，也没有使克罗恩病加重。欧洲食品安全专家认为，按目前的使用量，这些添加剂没有安全问题。乳化剂从长期来看是否会危害人类，目前尚不明确。
与该说法相关的研究
支持该说法的研究 (4)
-
Emulsifiers and gut inflammation in mice
Chassaing B et al.. Nature 2015 · PMID 25731162 · DOI 10.1038/nature14232动物研究被 Tayebat 档案网站引用全文，含结构化偏倚风险评估★ 关键研究Two common emulsifiers caused gut inflammation and metabolic problems in mice.
该研究是否支持这一具体说法？ 部分支持 · 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？
Do emulsifiers promote gut inflammation and metabolic syndrome via microbiota?
- 研究是如何开展的？
Mouse experiments with emulsifiers, germ-free mice and faecal transplants.
- 研究了多少人、动物或样本？
Not stated; Wild-type and colitis-prone mice
- 实际发现了什么？
Emulsifiers induced low-grade inflammation and obesity/metabolic syndrome in wild-type mice and robust colitis in predisposed mice; microbiota encroachment; effects transferable via microbiota.
- 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？
Possible concern for humans, not proven.
- 该研究有哪些局限？
Mouse study only; doses of 0.1-1% in all food or water; the researchers knew which mice got which treatment; some groups very small; only two emulsifiers tested.
- 它对 Elawady 的具体说法说明了什么？
- 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？
It cannot show that emulsifiers cause bowel inflammation or weight gain in humans, or at what human intake level any effect would occur.
-
Emulsifier CMC in a small human trial
Chassaing B et al.. Gastroenterology 2022 · PMID 34774538 · DOI 10.1053/j.gastro.2021.11.006随机对照试验被 Tayebat 档案网站引用已核查摘要Seven people eating CMC for 11 days had changes in gut bacteria and mild discomfort.
该研究是否支持这一具体说法？ 部分支持 · 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？
Does CMC affect the gut in healthy humans?
- 研究是如何开展的？
Double-blind controlled feeding study, 11 days.
- 研究了多少人、动物或样本？
16 (9 control, 7 CMC); Healthy adults
- 实际发现了什么？
CMC modestly increased postprandial abdominal discomfort, reduced microbiota diversity, reduced faecal SCFAs and free amino acids; 2 CMC subjects showed microbiota encroachment into inner mucus.
- 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？
Early human signal.
- 该研究有哪些局限？
Very small; Short; High dose; Surrogate outcomes
- 它对 Elawady 的具体说法说明了什么？
Supports C-UPF-06.
- 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？
Disease risk.
-
Emulsifiers and heart disease in France
Sellem L et al.. BMJ 2023 · PMID 37673430 · DOI 10.1136/bmj-2023-076058队列研究独立交叉核查全文，含结构化偏倚风险评估★ 关键研究Higher intake of some emulsifiers, including CMC, was linked with slightly more heart disease.
该研究是否支持这一具体说法？ 部分支持 · 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？
Are emulsifier intakes associated with CVD?
- 研究是如何开展的？
Prospective cohort with additive exposure estimation.
- 研究了多少人、动物或样本？
95,442; 1,995 CVD events; Adults without CVD, 79% women
- 实际发现了什么？
Celluloses (E460-E468) CVD HR 1.05 (1.02-1.09), CHD 1.07; CMC (E466) CVD 1.03 (1.01-1.05), CHD 1.04; E471/E472 associated with all outcomes; E472b cerebrovascular 1.11; trisodium phosphate CHD 1.06.
- 观察到的效应有多大？
HR 1.03-1.11 per SD
- 研究结果对日常生活意味着什么？
Small possible effect.
- 该研究有哪些局限？
One French cohort of mostly women volunteers; associations are very small and some disappear after correction for multiple testing; most emulsifiers studied showed no link; additive intake was estimated, not measured in blood or urine.
- 它对 Elawady 的具体说法说明了什么？
Supports C-UPF-06 weakly.
- 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？
It cannot show that emulsifiers cause heart disease, nor that they erode the gut mucus in people; it does not provide absolute risks.
-
Emulsifiers and diabetes in France
Salame C et al.. Lancet Diabetes Endocrinol 2024 · PMID 38663950 · DOI 10.1016/S2213-8587(24)00086-X队列研究独立交叉核查已核查摘要Several emulsifiers were linked with slightly higher diabetes risk.
该研究是否支持这一具体说法？ 部分支持 · 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？
Are emulsifiers associated with T2D?
- 研究是如何开展的？
Prospective cohort with time-dependent additive exposure.
- 研究了多少人、动物或样本？
104,139; 1,056 T2D cases; Adults, 79% women
- 实际发现了什么？
Carrageenans HR 1.03 per 100 mg/day; tripotassium phosphate 1.15 per 500 mg/day; E472e 1.04; sodium citrate 1.04; guar gum 1.11; gum arabic 1.03; xanthan gum 1.08.
- 观察到的效应有多大？
HR 1.03-1.15 per increment
- 研究结果对日常生活意味着什么？
Small possible effect.
- 该研究有哪些局限？
Single cohort; Multiple testing; Observational design; residual confounding possible; Self-reported dietary intake
- 它对 Elawady 的具体说法说明了什么？
Supports C-UPF-06 weakly.
- 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？
Causation.
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 (2)
-
Emulsifiers in people with Crohn's disease
Fitzpatrick JA et al.. Aliment Pharmacol Ther 2025 · PMID 39967287 · DOI 10.1111/apt.70041随机对照试验独立交叉核查已核查摘要In a small blinded trial, a diet high in food emulsifiers did not worsen Crohn's disease over four weeks compared with a low-emulsifier diet.
No effect of high vs low emulsifier diet on Crohn's disease activity over 4 weeks.
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？
To test whether food emulsifiers worsen Crohn's disease.
- 研究是如何开展的？
Double-blinded randomised feeding trial.
- 研究了多少人、动物或样本？
24 patients.
- 实际发现了什么？
No difference between diets; both improved.
- 观察到的效应有多大？
Remission 9/12 vs 7/12.
- 研究结果对日常生活意味着什么？
Avoiding emulsifiers is not proven to help Crohn's disease.
- 该研究有哪些局限？
Small and short.
- 它对 Elawady 的具体说法说明了什么？
Contradicts C-UPF-06 in humans.
- 研究结果是否适用于德国和欧洲？
Applicable.
- 从该研究中明确不能得出什么结论？
Cannot exclude long-term or dose-specific effects.
-
EU safety review of cellulose additives (including CMC)
EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS) et al.. EFSA J 2018 · PMID 32625652 · DOI 10.2903/j.efsa.2018.5047风险评估独立交叉核查已核查摘要EFSA found no safety concern for cellulose additives such as carboxymethylcellulose at the levels used in food.
EFSA 2018: no safety concern for celluloses including CMC (E 466) at reported uses.
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？
To re-evaluate cellulose food additives.
- 研究是如何开展的？
Regulatory risk assessment.
- 研究了多少人、动物或样本？
Not applicable.
- 实际发现了什么？
No toxicity concerns at reported uses.
- 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？
Authorities consider CMC safe at current levels.
- 该研究有哪些局限？
Mainly animal toxicology; microbiome data not decisive.
- 它对 Elawady 的具体说法说明了什么？
Contradicts C-UPF-06.
- 研究结果是否适用于德国和欧洲？
EU.
- 从该研究中明确不能得出什么结论？
Cannot exclude subtle gut 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)
-
Emulsifiers and the gut barrier in healthy people
Fitzpatrick JA et al.. Aliment Pharmacol Ther 2024 · PMID 39072856 · DOI 10.1111/apt.18172随机对照试验独立交叉核查已核查摘要A diet high in common food emulsifiers did not cause gut inflammation; the gut barrier was tighter at rest but leakier under stress.
No inflammation; barrier better at rest but more permeable under acute stress with high-emulsifier diet.
该研究是否支持这一具体说法？ 部分支持 · 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？
To test emulsifiers on the human gut barrier.
- 研究是如何开展的？
Randomised crossover feeding trial.
- 研究了多少人、动物或样本？
22 healthy adults.
- 实际发现了什么？
No inflammation; mixed barrier effects.
- 观察到的效应有多大？
Permeability ratio 0.030 vs 0.042 (rest).
- 研究结果对日常生活意味着什么？
Normal emulsifier intake did not inflame the gut in this short trial.
- 该研究有哪些局限？
Very small; surrogate markers.
- 它对 Elawady 的具体说法说明了什么？
Mixed for C-UPF-06.
- 研究结果是否适用于德国和欧洲？
Applicable.
- 从该研究中明确不能得出什么结论？
Cannot show long-term safety or harm.
该组中没有被标记为关键研究的研究。
地区背景
德国 / 欧盟
EFSA has re-evaluated many emulsifiers; they remain authorised with conditions of use; regulators have not concluded on these newer findings in this review.
埃及
No Egypt-specific data.
在我的国家适用什么？
一般科学评估
不明确 / 证据不足 不明确：乳化剂在小鼠中损害了肠道，但在正常摄入量下进行的小型人体试验没有发现炎症或疾病加重。
以下食品安全领域与该说法相关：
- 添加剂与加工
- 监管、进口、召回、标签
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
- Dietary emulsifiers impact the mouse gut microbiota promoting colitis and metabolic syndrome.. Chassaing B et al.. Nature 2015 · PMID 25731162 · DOI 10.1038/nature14232
- Randomized Controlled-Feeding Study of Dietary Emulsifier Carboxymethylcellulose Reveals Detrimental Impacts on the Gut Microbiota and Metabolome.. Chassaing B et al.. Gastroenterology 2022 · PMID 34774538 · DOI 10.1053/j.gastro.2021.11.006
- Food additive emulsifiers and risk of cardiovascular disease in the NutriNet-Santé cohort: prospective cohort study.. Sellem L et al.. BMJ 2023 · PMID 37673430 · DOI 10.1136/bmj-2023-076058
- Food additive emulsifiers and the risk of type 2 diabetes: analysis of data from the NutriNet-Santé prospective cohort study.. Salame C et al.. Lancet Diabetes Endocrinol 2024 · PMID 38663950 · DOI 10.1016/S2213-8587(24)00086-X
- Clinical Trial: The Effects of Emulsifiers in the Food Supply on Disease Activity in Crohn's Disease: An Exploratory Double-Blinded Randomised Feeding Trial.. Fitzpatrick JA et al.. Aliment Pharmacol Ther 2025 · PMID 39967287 · DOI 10.1111/apt.70041
- Re-evaluation of celluloses E 460(i), E 460(ii), E 461, E 462, E 463, E 464, E 465, E 466, E 468 and E 469 as food additives.. EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS) et al.. EFSA J 2018 · PMID 32625652 · DOI 10.2903/j.efsa.2018.5047
- The effect of dietary emulsifiers and thickeners on intestinal barrier function and its response to acute stress in healthy adult humans: A randomised controlled feeding study.. Fitzpatrick JA et al.. Aliment Pharmacol Ther 2024 · PMID 39072856 · DOI 10.1111/apt.18172