Methane and Hydrogen Positivity on Breath Test Is Associated With Greater Body Mass Index and Body Fat
Context:Colonization of the gastrointestinal tract with methanogenic archaea (methanogens) significantly affects host metabolism and weight gain in animal models, and breath methane is associated with a greater body mass index (BMI) among obese human subjects.Objective:The objective of the study was...
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          | Published in | The journal of clinical endocrinology and metabolism Vol. 98; no. 4; pp. E698 - E702 | 
|---|---|
| Main Authors | , , , , , | 
| Format | Journal Article | 
| Language | English | 
| Published | 
        United States
          Oxford University Press
    
        01.04.2013
     Copyright by The Endocrine Society Endocrine Society  | 
| Subjects | |
| Online Access | Get full text | 
| ISSN | 0021-972X 1945-7197 1945-7197  | 
| DOI | 10.1210/jc.2012-3144 | 
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| Abstract | Context:Colonization of the gastrointestinal tract with methanogenic archaea (methanogens) significantly affects host metabolism and weight gain in animal models, and breath methane is associated with a greater body mass index (BMI) among obese human subjects.Objective:The objective of the study was to characterize the relationship between methane and hydrogen on breath test (as a surrogate for colonization with the hydrogen requiring methanogen, Methanobrevibacter smithii), body weight, and percent body fat in a general population cohort.Design and Subjects:This was a prospective study (n = 792) of consecutive subjects presenting for breath testing.Setting:The study was conducted at a tertiary care center.Outcome Measurements:BMI and percent body fat were measured.Results:Subjects were classified into 4 groups based on breath testing: normal (N) (methane <3 ppm and hydrogen <20 ppm at or before 90 minutes); hydrogen positive only (H+) [methane <3 ppm and hydrogen ≥20 ppm); methane positive only (M+) (methane ≥3 ppm and hydrogen <20 ppm), or methane and hydrogen positive (M+/H+) (methane ≥3 ppm and hydrogen ≥20 ppm]. There were significant differences in age but not in gender across the groups. After controlling for age as a confounding variable, M+/H+ subjects had significantly higher BMI than other groups (N: 24.1 ± 5.2 kg/m2; H+: 24.2 ± 4.5 kg/m2; M+: 24.0 ± 3.75 kg/m2; M+/H+: 26.5 ± 7.1 kg/m2, P < .02) and also had significantly higher percent body fat (N: 28.3 ± 10.0%; H+: 27.5 ± 9.0%; M+: 28.0 ± 8.9%; M+/H+; 34.1 ± 10.9%, P < .001).Conclusions:The presence of both methane and hydrogen on breath testing is associated with increased BMI and percent body fat in humans. We hypothesize that this is due to colonization with the hydrogen-requiring M smithii, which affects nutrient availability for the host and may contribute to weight gain. | 
    
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| AbstractList | Context:Colonization of the gastrointestinal tract with methanogenic archaea (methanogens) significantly affects host metabolism and weight gain in animal models, and breath methane is associated with a greater body mass index (BMI) among obese human subjects.Objective:The objective of the study was to characterize the relationship between methane and hydrogen on breath test (as a surrogate for colonization with the hydrogen requiring methanogen, Methanobrevibacter smithii), body weight, and percent body fat in a general population cohort.Design and Subjects:This was a prospective study (n = 792) of consecutive subjects presenting for breath testing.Setting:The study was conducted at a tertiary care center.Outcome Measurements:BMI and percent body fat were measured.Results:Subjects were classified into 4 groups based on breath testing: normal (N) (methane <3 ppm and hydrogen <20 ppm at or before 90 minutes); hydrogen positive only (H+) [methane <3 ppm and hydrogen ≥20 ppm); methane positive only (M+) (methane ≥3 ppm and hydrogen <20 ppm), or methane and hydrogen positive (M+/H+) (methane ≥3 ppm and hydrogen ≥20 ppm]. There were significant differences in age but not in gender across the groups. After controlling for age as a confounding variable, M+/H+ subjects had significantly higher BMI than other groups (N: 24.1 ± 5.2 kg/m2; H+: 24.2 ± 4.5 kg/m2; M+: 24.0 ± 3.75 kg/m2; M+/H+: 26.5 ± 7.1 kg/m2, P < .02) and also had significantly higher percent body fat (N: 28.3 ± 10.0%; H+: 27.5 ± 9.0%; M+: 28.0 ± 8.9%; M+/H+; 34.1 ± 10.9%, P < .001).Conclusions:The presence of both methane and hydrogen on breath testing is associated with increased BMI and percent body fat in humans. We hypothesize that this is due to colonization with the hydrogen-requiring M smithii, which affects nutrient availability for the host and may contribute to weight gain. Colonization of the gastrointestinal tract with methanogenic archaea (methanogens) significantly affects host metabolism and weight gain in animal models, and breath methane is associated with a greater body mass index (BMI) among obese human subjects.CONTEXTColonization of the gastrointestinal tract with methanogenic archaea (methanogens) significantly affects host metabolism and weight gain in animal models, and breath methane is associated with a greater body mass index (BMI) among obese human subjects.The objective of the study was to characterize the relationship between methane and hydrogen on breath test (as a surrogate for colonization with the hydrogen requiring methanogen, Methanobrevibacter smithii), body weight, and percent body fat in a general population cohort.OBJECTIVEThe objective of the study was to characterize the relationship between methane and hydrogen on breath test (as a surrogate for colonization with the hydrogen requiring methanogen, Methanobrevibacter smithii), body weight, and percent body fat in a general population cohort.This was a prospective study (n = 792) of consecutive subjects presenting for breath testing.DESIGN AND SUBJECTSThis was a prospective study (n = 792) of consecutive subjects presenting for breath testing.The study was conducted at a tertiary care center.SETTINGThe study was conducted at a tertiary care center.BMI and percent body fat were measured.OUTCOME MEASUREMENTSBMI and percent body fat were measured.Subjects were classified into 4 groups based on breath testing: normal (N) (methane <3 ppm and hydrogen <20 ppm at or before 90 minutes); hydrogen positive only (H+) [methane <3 ppm and hydrogen ≥20 ppm); methane positive only (M+) (methane ≥3 ppm and hydrogen <20 ppm), or methane and hydrogen positive (M+/H+) (methane ≥3 ppm and hydrogen ≥20 ppm]. There were significant differences in age but not in gender across the groups. After controlling for age as a confounding variable, M+/H+ subjects had significantly higher BMI than other groups (N: 24.1 ± 5.2 kg/m(2); H+: 24.2 ± 4.5 kg/m(2); M+: 24.0 ± 3.75 kg/m(2); M+/H+: 26.5 ± 7.1 kg/m(2), P < .02) and also had significantly higher percent body fat (N: 28.3 ± 10.0%; H+: 27.5 ± 9.0%; M+: 28.0 ± 8.9%; M+/H+; 34.1 ± 10.9%, P < .001).RESULTSSubjects were classified into 4 groups based on breath testing: normal (N) (methane <3 ppm and hydrogen <20 ppm at or before 90 minutes); hydrogen positive only (H+) [methane <3 ppm and hydrogen ≥20 ppm); methane positive only (M+) (methane ≥3 ppm and hydrogen <20 ppm), or methane and hydrogen positive (M+/H+) (methane ≥3 ppm and hydrogen ≥20 ppm]. There were significant differences in age but not in gender across the groups. After controlling for age as a confounding variable, M+/H+ subjects had significantly higher BMI than other groups (N: 24.1 ± 5.2 kg/m(2); H+: 24.2 ± 4.5 kg/m(2); M+: 24.0 ± 3.75 kg/m(2); M+/H+: 26.5 ± 7.1 kg/m(2), P < .02) and also had significantly higher percent body fat (N: 28.3 ± 10.0%; H+: 27.5 ± 9.0%; M+: 28.0 ± 8.9%; M+/H+; 34.1 ± 10.9%, P < .001).The presence of both methane and hydrogen on breath testing is associated with increased BMI and percent body fat in humans. We hypothesize that this is due to colonization with the hydrogen-requiring M smithii, which affects nutrient availability for the host and may contribute to weight gain.CONCLUSIONSThe presence of both methane and hydrogen on breath testing is associated with increased BMI and percent body fat in humans. We hypothesize that this is due to colonization with the hydrogen-requiring M smithii, which affects nutrient availability for the host and may contribute to weight gain. Colonization of the gastrointestinal tract with methanogenic archaea (methanogens) significantly affects host metabolism and weight gain in animal models, and breath methane is associated with a greater body mass index (BMI) among obese human subjects. The objective of the study was to characterize the relationship between methane and hydrogen on breath test (as a surrogate for colonization with the hydrogen requiring methanogen, Methanobrevibacter smithii), body weight, and percent body fat in a general population cohort. This was a prospective study (n = 792) of consecutive subjects presenting for breath testing. The study was conducted at a tertiary care center. BMI and percent body fat were measured. Subjects were classified into 4 groups based on breath testing: normal (N) (methane <3 ppm and hydrogen <20 ppm at or before 90 minutes); hydrogen positive only (H+) [methane <3 ppm and hydrogen ≥20 ppm); methane positive only (M+) (methane ≥3 ppm and hydrogen <20 ppm), or methane and hydrogen positive (M+/H+) (methane ≥3 ppm and hydrogen ≥20 ppm]. There were significant differences in age but not in gender across the groups. After controlling for age as a confounding variable, M+/H+ subjects had significantly higher BMI than other groups (N: 24.1 ± 5.2 kg/m(2); H+: 24.2 ± 4.5 kg/m(2); M+: 24.0 ± 3.75 kg/m(2); M+/H+: 26.5 ± 7.1 kg/m(2), P < .02) and also had significantly higher percent body fat (N: 28.3 ± 10.0%; H+: 27.5 ± 9.0%; M+: 28.0 ± 8.9%; M+/H+; 34.1 ± 10.9%, P < .001). The presence of both methane and hydrogen on breath testing is associated with increased BMI and percent body fat in humans. We hypothesize that this is due to colonization with the hydrogen-requiring M smithii, which affects nutrient availability for the host and may contribute to weight gain. CONTEXT:Colonization of the gastrointestinal tract with methanogenic archaea (methanogens) significantly affects host metabolism and weight gain in animal models, and breath methane is associated with a greater body mass index (BMI) among obese human subjects. OBJECTIVE:The objective of the study was to characterize the relationship between methane and hydrogen on breath test (as a surrogate for colonization with the hydrogen requiring methanogen, Methanobrevibacter smithii), body weight, and percent body fat in a general population cohort. DESIGN AND SUBJECTS:This was a prospective study (n = 792) of consecutive subjects presenting for breath testing. SETTING:The study was conducted at a tertiary care center. OUTCOME MEASUREMENTS:BMI and percent body fat were measured. RESULTS:Subjects were classified into 4 groups based on breath testingnormal (N) (methane <3 ppm and hydrogen <20 ppm at or before 90 minutes); hydrogen positive only (H+) [methane <3 ppm and hydrogen ≥20 ppm); methane positive only (M+) (methane ≥3 ppm and hydrogen <20 ppm), or methane and hydrogen positive (M+/H+) (methane ≥3 ppm and hydrogen ≥20 ppm]. There were significant differences in age but not in gender across the groups. After controlling for age as a confounding variable, M+/H+ subjects had significantly higher BMI than other groups (N24.1 ± 5.2 kg/m; H+24.2 ± 4.5 kg/m; M+24.0 ± 3.75 kg/m; M+/H+26.5 ± 7.1 kg/m, P < .02) and also had significantly higher percent body fat (N28.3 ± 10.0%; H+27.5 ± 9.0%; M+28.0 ± 8.9%; M+/H+; 34.1 ± 10.9%, P < .001). CONCLUSIONS:The presence of both methane and hydrogen on breath testing is associated with increased BMI and percent body fat in humans. We hypothesize that this is due to colonization with the hydrogen-requiring M smithii, which affects nutrient availability for the host and may contribute to weight gain. Context:Colonization of the gastrointestinal tract with methanogenic archaea (methanogens) significantly affects host metabolism and weight gain in animal models, and breath methane is associated with a greater body mass index (BMI) among obese human subjects.Objective:The objective of the study was to characterize the relationship between methane and hydrogen on breath test (as a surrogate for colonization with the hydrogen requiring methanogen, Methanobrevibacter smithii), body weight, and percent body fat in a general population cohort.Design and Subjects:This was a prospective study (n = 792) of consecutive subjects presenting for breath testing.Setting:The study was conducted at a tertiary care center.Outcome Measurements:BMI and percent body fat were measured.Results:Subjects were classified into 4 groups based on breath testing: normal (N) (methane <3 ppm and hydrogen <20 ppm at or before 90 minutes); hydrogen positive only (H+) [methane <3 ppm and hydrogen greater than or equal to 20 ppm); methane positive only (M+) (methane greater than or equal to 3 ppm and hydrogen <20 ppm), or methane and hydrogen positive (M+/H+) (methane greater than or equal to 3 ppm and hydrogen greater than or equal to 20 ppm]. There were significant differences in age but not in gender across the groups. After controlling for age as a confounding variable, M+/H+ subjects had significantly higher BMI than other groups (N: 24.1 plus or minus 5.2 kg/m2; H+: 24.2 plus or minus 4.5 kg/m2; M+: 24.0 plus or minus 3.75 kg/m2; M+/H+: 26.5 plus or minus 7.1 kg/m2, P < .02) and also had significantly higher percent body fat (N: 28.3 plus or minus 10.0%; H+: 27.5 plus or minus 9.0%; M+: 28.0 plus or minus 8.9%; M+/H+; 34.1 plus or minus 10.9%, P < .001).Conclusions:The presence of both methane and hydrogen on breath testing is associated with increased BMI and percent body fat in humans. We hypothesize that this is due to colonization with the hydrogen-requiring M smithii, which affects nutrient availability for the host and may contribute to weight gain.  | 
    
| Author | Barlow, G. M. Amichai, M. Mathur, R. Mirocha, J. Pimentel, M. Chua, K. S.  | 
    
| AuthorAffiliation | Division of Endocrinology, Diabetes, and Metabolism (R.M.), GI Motility Program (M.A., K.S.C., G.M.B., M.P.), and Biostatistics Core (J.M.), Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048 | 
    
| AuthorAffiliation_xml | – name: Division of Endocrinology, Diabetes, and Metabolism (R.M.), GI Motility Program (M.A., K.S.C., G.M.B., M.P.), and Biostatistics Core (J.M.), Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048 | 
    
| Author_xml | – sequence: 1 givenname: R. surname: Mathur fullname: Mathur, R. email: ruchi.mathur@cshs.org organization: 1Division of Endocrinology, Diabetes, and Metabolism (R.M.) – sequence: 2 givenname: M. surname: Amichai fullname: Amichai, M. organization: 2GI Motility Program (M.A., K.S.C., G.M.B., M.P.) – sequence: 3 givenname: K. S. surname: Chua fullname: Chua, K. S. organization: 3Biostatistics Core (J.M.), Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048 – sequence: 4 givenname: J. surname: Mirocha fullname: Mirocha, J. organization: 3Biostatistics Core (J.M.), Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048 – sequence: 5 givenname: G. M. surname: Barlow fullname: Barlow, G. M. organization: 2GI Motility Program (M.A., K.S.C., G.M.B., M.P.) – sequence: 6 givenname: M. surname: Pimentel fullname: Pimentel, M. organization: 2GI Motility Program (M.A., K.S.C., G.M.B., M.P.)  | 
    
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/23533244$$D View this record in MEDLINE/PubMed | 
    
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| Title | Methane and Hydrogen Positivity on Breath Test Is Associated With Greater Body Mass Index and Body Fat | 
    
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