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measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby src=https:reader033vdocumentsusreader033viewer20220418125e5833c7108faa186322c5b3html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: tolate receptorrequires a lumbar puncture LP a rather invasive procedure to measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby src=https:reader033vdocumentsusreader033viewer20220418125e5833c7108faa186322c5b3html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: tolate receptorrequires a lumbar puncture LP a rather invasive procedure to measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby src=https:reader033vdocumentsusreader033viewer20220418125e5833c7108faa186322c5b3html5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 6button div class=ts-image amp-img class=ts-thumb alt=Page 6: tolate receptorrequires a lumbar puncture LP a rather invasive procedure to measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby src=https:reader033vdocumentsusreader033viewer20220418125e5833c7108faa186322c5b3html5thumbnails6jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 7button div class=ts-image amp-img class=ts-thumb alt=Page 7: tolate receptorrequires a lumbar puncture LP a rather invasive procedure to measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby src=https:reader033vdocumentsusreader033viewer20220418125e5833c7108faa186322c5b3html5thumbnails7jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 8button div class=ts-image amp-img class=ts-thumb alt=Page 8: tolate receptorrequires a lumbar puncture LP a rather invasive procedure to measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby src=https:reader033vdocumentsusreader033viewer20220418125e5833c7108faa186322c5b3html5thumbnails8jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 9button div class=ts-image amp-img class=ts-thumb alt=Page 9: tolate receptorrequires a lumbar puncture LP a rather invasive procedure to measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby src=https:reader033vdocumentsusreader033viewer20220418125e5833c7108faa186322c5b3html5thumbnails9jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 10button div class=ts-image amp-img class=ts-thumb alt=Page 10: tolate receptorrequires a lumbar puncture LP a rather invasive procedure to measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby src=https:reader033vdocumentsusreader033viewer20220418125e5833c7108faa186322c5b3html5thumbnails10jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 11button div class=ts-image amp-img class=ts-thumb alt=Page 11: tolate receptorrequires a lumbar puncture LP a rather invasive procedure to measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby src=https:reader033vdocumentsusreader033viewer20220418125e5833c7108faa186322c5b3html5thumbnails11jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 12button div class=ts-image amp-img class=ts-thumb alt=Page 12: tolate receptorrequires a lumbar puncture LP a rather invasive procedure to measure CSF 5MTHF levels However FRA concentrations can be measured using a blood test thereby 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