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Protocol ExplainersJune 30, 20268 min read

Should I Start with Dry Fasting or T3 Therapy First?

The single most common sequencing question in the Scorch Protocol, the temperature threshold that determines the answer, and what happens when patients get the order wrong.

By Yannick Wolfe

The Short Answer

The default order in the Scorch Protocol is fast first. In Yannick's experience, T3 first is reserved for the person who has already been fasting, pushing through it, and getting worse each time: fasting is just not working, there are signs of metabolic trouble, and the system needs a jump start before it can respond to a fast. Otherwise, always fast first. A very low basal body temperature (below 96°F, and especially below 95°F) is one of the metabolic signs that makes this question live, and the temperature paths below map who tends to struggle; it is the failed-fasting history with those signs that flips the order.

Update, October 2026. Earlier versions of this article made the 96°F threshold the entry rule on its own. Over time the data showed that the people who truly need T3 before a fast are the ones who have already tried fasting and kept getting worse, so the rule is now stated that way. The temperature sections are kept because they still describe who is most likely to end up in that group.

Why Sequencing Matters

Water fasting vs dry fasting: which one and when A two-column comparison of water fasting vs dry fasting across four dimensions: cleanup depth, session length, risk level, and ideal patient. Water fasting is gentler, longer, and lower-risk. Dry fasting is deeper, shorter, and higher-risk but reaches viral reservoirs. The Scorch Protocol answer: 5 days dry, then 5 days water. WHICH ONE, AND WHEN Water vs dry fasting: the honest comparison WATER FASTING DRY FASTING CLEANUP DEPTH Shallow → surface cells only CLEANUP DEPTH Deep → reaches tissue reservoir SESSION LENGTH Longer (weeks possible) SESSION LENGTH Shorter (5 days standard) RISK LEVEL Lower → beginner-accessible RISK LEVEL Higher → climbs past day 5 BEST FOR Mild/recent illness, beginners BEST FOR Entrenched viral chronics VS The Scorch answer 5 days dry → then 5 days water. Use both, in sequence.

The standard Scorch Protocol sequence is dry fasting → T3 therapy → refeeding plus hGH → rotation. This order is mechanistically logical: the fast clears the viral and inflammatory drivers, T3 restores the cellular electricity to use the cleared system, refeeding plus hGH rebuilds the depleted tissue.

For most chronic illness patients, this order is the right entry. The fast does what the fast does, and the T3 follows productively on the cleared foundation.

For severely depleted patients, the order produces a different result. The fast on a deeply suppressed metabolic base does not produce the productive cleanup that it produces in moderately depleted patients. Instead, it produces:

  • Severe symptoms during the fast without the corresponding therapeutic benefit
  • Catastrophic refeeding (the cellular machinery is too suppressed to handle the metabolic transition)
  • Substantial post-fast crash that takes weeks to months to recover from, often setting the patient back further than their pre-protocol baseline
  • Frustration and protocol abandonment

The temperature threshold of 96°F is the practical line between these two outcomes. Above 96°F, the body's metabolic capacity is sufficient to respond productively to the fast. Below 96°F, particularly below 95°F, it is not.

Why Temperature Specifically

Body temperature gauge: long-covid cold zone vs 98.6°F target A horizontal temperature gauge from 96°F to 99°F. Long-covid patients typically sit around 96–97.8°F (shown in blue, cold zone). The 98.6°F target is marked in green. Standard labs can read normal even while body temperature signals metabolic collapse at the cellular level. READ THE GAUGE Labs say normal. The furnace is cold. 96°F 97° 98° 98.6° 99°F Long-covid zone Typical range: 96°–97.8°F Blood work: often reads normal T3 not entering cells → metabolic collapse Recovery target Goal: 98.6°F baseline Sustained, not just a single reading Cells burning fuel at full rate again Why labs miss this Blood tests measure circulating T3. They cannot tell you whether T3 is entering cells and switching on energy production. Measure morning temperature before rising, then 30 min after breakfast. Log for weeks, not days.

Basal body temperature is not just a thermometer reading. It is the functional readout of cellular metabolic rate.

T3 (the active thyroid hormone) drives mitochondrial ATP production. ATP production produces heat as a byproduct. When cellular T3 activity is adequate, mitochondrial output is robust, ATP production is high, and the heat byproduct maintains 98.6°F core temperature.

When cellular T3 activity is suppressed (which is what happens in severely chronically ill patients with tissue-level thyroid resistance), mitochondrial output drops, ATP production falls, and core temperature falls to whatever the suppressed metabolism can produce. The temperature is what the cells are actually doing.

This is why temperature is a more useful single marker than serum thyroid labs. TSH and free T4 can be "normal" in patients with profound tissue-level T3 deficiency; temperature cannot lie about the cellular state.

The 96°F threshold is the practical line where the cellular metabolism still has enough function to respond to hyperosmotic stress with the productive autophagy and immune surge that makes the fast worthwhile. Below this line, the cellular machinery is too suppressed; the fast produces the stress without the productive response.

What Happens When Patients Get the Order Wrong

Wrong order vs right order: what happens when a sub-96°F patient fasts first Two columns compare the fast-first path versus the T3-first path for patients with basal body temperature below 96°F. The wrong order produces a severe fast, catastrophic refeed, post-fast crash, and months of lost ground. The right order builds a metabolic floor first, then produces a productive fast and genuine recovery. THE ORDER PROBLEM Same protocol. Wrong sequence. Different result. FAST FIRST (sub-96°F) T3 FIRST, THEN FAST DURING THE FAST Severe. No cortisol surge. Cognition worsens. Energy absent. DURING THE FAST Productive cleanup. HPA responds. Autophagy fires. REFEED WINDOW Catastrophic. MCAS flares severe. Refeeding syndrome risk elevated. Manageable. Cells ready. Insulin response functional. 2-8 WEEKS POST-FAST Deep crash. Energy floor drops. Below pre-protocol baseline. Gradual lift. Symptoms ease. Protocol is working as intended. 6-MONTH OUTCOME Lost ground. Protocol abandoned. Sequence was wrong. Protocol was not. Cycle 2 scheduled. Stacking productive cycles. The 96°F threshold separates which column you are in before the fast even begins.

The pattern of attempting standard sequence dry fasting at sub-96°F baseline is consistent enough across patient reports that it warrants explicit description:

The fast itself. Difficult, often severely so. Symptoms during the fast are pronounced. Energy is absent (the cortisol surge that powers a normal dry fast does not materialize fully because HPA function is too suppressed). Cognitive symptoms worsen rather than improve.

The refeed window. Severely challenging. Refeeding syndrome risk is elevated. MCAS reactivations are common and severe. Glucose handling is poor; insulin response is dysfunctional.

The 2-8 week post-fast window. Substantial worsening of baseline symptoms. Energy floor often drops below pre-protocol baseline. Patient reports feeling "wrecked" or "thrown back." The temporary benefit some patients see in the immediate post-fast period (often a few good days) is misleading; the deeper crash follows.

The 2-6 month follow-up. Some patients gradually recover to roughly their pre-protocol baseline. Some patients do not fully recover and are now operating below their pre-protocol baseline. Either way, the protocol has not advanced; the patient has lost ground.

This is the pattern that earns T3 first: fasting tried, pushed through, and worse each time, with metabolic signs on top. The same patient, starting with T3 therapy first, raising basal body temperature above 96°F, then attempting the standard sequence, gets a different result.

The frustration in this pattern is that the patients who experience it often conclude the protocol does not work for them. The protocol works; the sequence was wrong.

The Modified Sequence for Sub-96°F Patients

The modified 90-day sequence for ME/CFS with temperature below 96°F Four phases shown as horizontal timeline panels: Days 0-14 establish baseline tracking only; Days 14-30 start T3 therapy first; Days 30-60 climb T3 dose while MCAS settles; Days 60-90 introduce short fasts once the metabolic foundation is ready. The standard protocol places dry fasting first; this profile, once fasting has already failed, requires building the metabolic floor before the next fast. THE MODIFIED SEQUENCE If fasting keeps failing below 96°F, the order changes Day 0 Day 14 Day 30 Day 60 Day 90 DAYS 0-14 Baseline Track temp daily Symptom diary No interventions DAYS 14-30 T3 first SR-T3 12.5 mcg twice daily to start Watch temp move DAYS 30-60 T3 climb 60-100 mcg by wk 8 MCAS calms down Diet expands DAYS 60-90 Short fasts 24h water fast 48h, then 72h 24h dry fast Ready for 5-day dry fast TEMP TRAJECTORY 95.4°F 97.5°F+ 96°F below this line: extended fasting is counterproductive The 90-day window builds the metabolic floor. The 5-day fast works better on a prepared system.

For the patient whose fasts have kept failing with a baseline body temperature below 96°F, the modified entry sequence:

Days 0-14: Baseline establishment. Daily basal body temperature tracking, resting heart rate tracking, symptom inventory. Confirm the sub-96°F baseline; a single low reading is not enough; the 14-day average is what drives the decision.

Days 14-30: T3 initiation. Slow-release T3 starting at 12.5 mcg twice daily. Climb by 12.5 mcg every 3-5 days based on temperature response. Continue tracking daily.

Days 30-60: T3 climb continues. Dose climbs as temperature responds. Most patients reach 60-100 mcg/day during this window with temperature climbing 0.1-0.2°F per week.

Days 60-90: Tolerance building with short fasts. With basal body temperature now climbing above 96°F, short fasts (24-hour, 48-hour, 72-hour water fasts) become productive. Tolerance for the metabolic transitions is being built progressively.

Days 90+: Standard sequence applies. First 5-day dry fast becomes appropriate. The standard protocol from this point forward.

The total preparation window is approximately 3 months before the first extended fast. This compares to approximately 1 month of preparation for the standard sequence in the higher-temperature cohort. The longer preparation is what makes the eventual fast productive rather than destructive.

The full implementation context for this modified sequence is in the 5-year ME/CFS protocol walkthrough.

When the Temperature Threshold Is Not the Right Marker

A few specific situations where the temperature threshold needs additional consideration:

Acute illness affecting temperature. A recent viral infection, recent surgery, or acute inflammation can transiently affect baseline temperature. The 14-day average should not be taken during an acute event; wait for the acute layer to clear.

Medications affecting temperature. Some medications (beta blockers, certain antipsychotics, opioids) affect baseline temperature independently of metabolic state. Adjust the interpretation accordingly.

Environmental factors. Sleep environment temperature, time of measurement, and other environmental factors should be controlled across the 14-day tracking window. Inconsistent measurement methodology produces unreliable baseline.

Significant POTS or dysautonomia. Some POTS patients have temperature dysregulation patterns that produce variable readings; the 14-day average is still meaningful but the variance may be wider than in non-POTS patients.

Severe MCAS. Patients with severe active MCAS often have lower baseline temperature partly due to the inflammatory state. The protocol modification (slower refeed, MCAS-aware implementation throughout) applies regardless of temperature, but the temperature threshold for fasting-first vs T3-first still applies.

What If You Are Borderline?

For patients at 95.5-96°F baseline, the decision is genuinely borderline. Several considerations:

T3 first, when fasting has already failed. If the patient has already been fasting, pushing through, and getting worse, with the depletion markers on top (severe symptoms, MCAS, POTS, severe brain fog, severe PEM), T3 first is the right call. The downside of a T3 course that turns out unnecessary is small; you wean off and bounce back.

Standard approach: Short fast first, observe. A 48-hour water fast as a tolerance test before committing to either path is reasonable for borderline patients. If the 48-hour fast is tolerated well with appropriate response, the standard sequence may be appropriate. If the 48-hour fast produces disproportionate symptoms or post-fast crash, the modified sequence is appropriate.

Aggressive approach: Standard sequence with extra preparation. For motivated patients in the borderline range who have done substantial preparation work, the standard sequence with extended preparation (1-2 months of dietary optimization, sleep optimization, gentle exercise as tolerated, multiple shorter water fasts) before the first 5-day dry fast can work. This is for the highly motivated and well-supported subset; it is not the default recommendation.

For borderline patients who have never fasted, fast first and watch the response; for those whose fasts have already made them worse, T3 first.

Frequently Asked Questions

How long until my temperature rises on T3?

Most patients see initial temperature movement within 2-4 weeks of T3 reaching therapeutic effect. Substantial temperature climb (from sub-96°F to above 96°F) typically takes 6-10 weeks of T3 therapy with appropriate dose titration.

What if my temperature does not rise on T3?

If basal body temperature does not respond to gradually escalating SR-T3 doses up to 150 mcg by week 10, the issue is likely beyond simple thyroid resistance. Other mechanisms (severe metabolic collapse, untreated chronic infection, advanced HPT axis dysfunction) may be involved. Further medical evaluation is appropriate.

Can I start with both T3 and dry fasting at the same time?

No. The order is fast first, then the 30-day T3 course after the refeed if the fast leaves a metabolic slowdown behind; or, for the person whose fasts have kept failing, T3 first to establish a foundation, then the fast. The two are not run together.

How long do I have to wait between dry fast cycles?

A cycle is the fast, the refeed, and the 30-day T3 course if you needed it. Finish the T3 course, wait seven days, and go back into the next fast. If you came out of the fast running hot, holding your weight and feeling great, you skip the T3 course, and when the next fast opens on that path is set case by case. Shorter spacing risks cumulative damage; longer spacing is fine.

What if I am in the over-adapted profile (below 95°F)?

The T3-first sequence is mandatory. Attempting an extended fast at sub-95°F baseline is in the "more likely to harm than help" category. See the 5-year ME/CFS protocol walkthrough for the specific implementation for this profile.

Where do I start?

Track your basal body temperature for 14 days. Calculate the average. Match to the entry point: above 96°F → standard sequence (the dry fasting complete guide); below 96°F → T3-first (the T3 therapy complete guide); below 95°F → T3-first with extended preparation (the 5-year ME/CFS protocol walkthrough).

Where to Start

The protocol sequencing decision is governed by your basal body temperature. The 14-day tracking is the prerequisite for any other protocol decisions. Once you have your baseline, the entry point is straightforward.

For the broader decision tree across all the major variables (illness duration, layered conditions, contraindications), see the Scorch Protocol Decision Tree. For the chronic illness recovery framework specific to your cohort, see the Long Covid Recovery guide, the ME/CFS Recovery guide, or the chronic Lyme recovery guide.

Related Protocol Section

This article explains the science behind a specific phase of the Scorch Protocol.

Read the full protocol section →
Topics:protocol-sequencingdry-fastingt3-therapybasal-body-temperatureprotocol-entryscorch-protocol

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The information on this site describes a personal health protocol and is provided for educational purposes only. It is not medical advice. Consult a qualified physician before modifying your diet, fasting practice, or any medication regimen.