Inclusion Criteria
* Adult (18-69 years old)
* Five or more common Long Covid symptoms
* Free from fever \> 100F and known bacterial and parasitic infections
* Must indicate willingness to limit certain supplements and report all medications.
* Must indicate willingness to make significant dietary changes - and limit daily eating to an 8 or 10 hour window.
* Must indicate willingness to attempt 36 hr or 60 hr water fasts each week for 4 weeks.
* Have a valid email address and phone number
* Reside in the United States
* Be able to read and to communicate in English
* Must indicate willingness to avoid "extra" supplements such as Fish Yes Oil, Cod liver Oil, Krill Oil, MCT oil, Coconut Oil, Tumeric/Curcumin, Berberine, Quercetin (\> 500 mg), Red Yeast Rice, French Marine Bark extract, Red Sage, Ginko biloba, Oregano Oil, Peppermint Oil, Black seed oil, Cinnamon bark extract, Elderberry, Stinging Nettle, Milk Thistle, Monolaurin, Vendicinals 9, Tollovid, QuadraMune and all Probiotics.
* Must indicate willingness to avoid certain nutraceuticals such as Zinc (more than 25 mg), Arginine, Glutamine, Palmitoylethanolamide (PEA), Alpha Lipoic Acid, L Carnitine and Taurine during the study period.
* Must indicate willingness to avoid longevity supplements such as NAD+, Niacin, NMN, Nicotinamide Riboside, Spermidine and Fisetin during the study period.
* Must indicate willingness to halt Olive oil consumption greater than 1 tsp daily during the study period.
Exclusion Criteria:
* Likely COVID-19 or SARS-CoV-2 infection \< 45 days before enrollment
* Body Mass Index (BMI) must be 20 or greater
* Past history of an eating disorder.
* Previously fasted more than 18 hours with Long COVID
* Currently doing intermittent fasting
* Pregnant or breast-feeding
* Severe pulmonary disease requiring supplemental oxygen
* Partial loss of vision due to macular degeneration
* Any recent (90 days) history of malignancies, fractures, surgery, radiation, chemo, anesthesia, or traumas
* Diagnosed with Type I or Type II Diabetes
* Previous Autoimmune condition
* Heart condition (Coronary artery disease, Heart valve disease, Heart No failure, Stroke)
* Pre-pandemic Arrythmia
* Liver disease
* Previous Chronic Health Conditions that did not fully resolve (Includes ME/CFS, Lyme Disease, and Fibromyalgia)
* Prescription anticoagulation medication that cannot be halted during the study period. Brilinta (ticagrelor), Plavix (clopidogrel), Coumadin, Warfarin etc.
* High Cholesterol medications that cannot be halted or reduced during the study period (Fenofibrate, Statins \> 10 mg)
* Anti-inflammatories or immunosuppressants such as Steroids, Low dose Naltrexone (LDN), Maraviroc, Remicade/Infliximab or Colchicine that cannot be halted during the study period
* Metformin, Ivermectin, or peptides such as BCP-157 that cannot be halted during the study period
