Human digestive evolution: Difference between revisions

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==Section 2 Microbiome==
==Section 2 Microbiome==
Include some current research, with a second image.<br><br>
Include some current research, with a second image.<br><br>
Recent research suggests that the composition of a person's microbiome may affect their ability to digest lactose to an extent. Though the sample study is notably small (8), it seems that, in part, transplanting certain beta-galactosidase expressing cultures (Such as L. acidophilus) may, in fact, reduce the severity of symptoms. Because of the incredibly early state of research on the topic, it is too early for any definitive trends or statements to be stated with much confidence <ref>[https://link.springer.com/article/10.1007%2Fs12602-018-9507-7 Rachel Gingold-Belfer et al., F.A. "<i>Use of a Novel Probiotic Formulation to Alleviate Lactose Intolerance Symptoms—</i> a Pilot Study." 2019. Springer Link 6:2634-2637.]</ref>


==Conclusion==
==Conclusion==

Revision as of 03:30, 8 November 2019

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Section 1 Genetics

Include some current research, with at least one image.

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Perhaps one of the highest-impact short-term genetic digestive change has been the evolution of a Lactase-permanence gene (LCT). The separate incidences of LCT mutants that were positively selected for vary by region and ethnicity. These range in age from 8,000-9,000 years ago (European Populations) to 2,700-6,000 years ago (African Populations). Howvever, on average, the lactase mutation is present at much lower frequencies in African populations versus European or Middle Eastern populations. This results in higher average rates of lactose intolerance within said population. [3]

Section 2 Microbiome

Include some current research, with a second image.

Recent research suggests that the composition of a person's microbiome may affect their ability to digest lactose to an extent. Though the sample study is notably small (8), it seems that, in part, transplanting certain beta-galactosidase expressing cultures (Such as L. acidophilus) may, in fact, reduce the severity of symptoms. Because of the incredibly early state of research on the topic, it is too early for any definitive trends or statements to be stated with much confidence [4]

Conclusion

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References


Edited by [Daniel Frank], student of Joan Slonczewski for BIOL 116 Information in Living Systems, 2019, Kenyon College.