Constipation : Slowed digestion and bowel movements, with problems passing stool
The mean incubation period for COVID-19 onset was estimated to be 5.1 days, and most cases develop symptoms after 14 days

Patients who I recommend screen for MTHFR mutations: Pre-conception care: test both man and woman Mental dysfunction including but not limited to depression, anxiety, irritability, mood swings, schizophrenia, bipolar Infants and children of parents with MTHFR mutations Family members related to someone with MTHFR mutations Elevated folate (not processing to active 5-MTHF due to inability to methylate) Elevated homocysteine (due to low active 5-MTHF and methylcobalamin) Elevated s-adenosylhomocysteine (due to low active 5-MTHF and methylcobalamin) Elevated serum cobalamin (due to inability to methylate cyanocobalamin to methylcobalamin) Elevated methylmalonic acid (due to methylcobalamin deficiency) Patients with syndromes: IBS, Chemical sensitivity, Fibromyalgia, Down Syndrome, Chronic fatigue syndrome Neurological disorders: Multiple sclerosis, Autism, Alzheimers, Epilepsy, Parkinsons to name a few Cancer: family history of cancer or undergoing cancer treatment Cervical dysplasia Infertility Cardiovascular risk: family history of strokes, embolisms, heart attacks, clots, essential hypertension Birth defects: cleft palate, tetralogy of Fallot, spinal bifida, midline defects Drug sensitivities: methotrexate, anti-epileptics, nitrous oxide, anesthesia If you are interested in knowing more about your genes, the 23andme gene test will be the best $99 investment you've ever spent

10.1073/pnas.1414056112 191 StillE
Lower cost ($40-$80) but less peptide expertise
Then the relative expression of HrGSTm1 in different tissues was determined using qPCR