Longer Fasts

Now we need to make an important distinction.

Skipping breakfast and fasting overnight is one thing.

Going:

24 hours.

36 hours.

48 hours.

or several days without food is something different.

The farther you extend a fast, the more seriously you need to take:

Hydration.Electrolytes.Medication.Blood sugar.Nutritional status.Activity.Underlying health.

Your source makes that point directly and warns that longer does not automatically mean better.

24-Hour Fasting

A 24-hour fast means going a full day without eating.

This is the first major step beyond the intermittent-fasting schedules we just discussed.

Your source's preferred progression specifically places a 24-hour fast after becoming accustomed to shorter intermittent fasting and, when appropriate, OMAD.

That's exactly how I would approach it.

Don't jump from:

“I eat six times a day.”

to:

“I'm doing a three-day fast tomorrow.”

Build up.

By around the 18-to-24-hour period, the fasting material says glycogen stores are continuing to become depleted, your body is increasingly producing some glucose internally through gluconeogenesis, and you're moving deeper toward ketosis.

Again, that's a general progression—not a stopwatch.

36-Hour Fasting

A 36-hour fast extends beyond the one-day mark.

Your source includes 36 hours in the planned chapter outline, but it does not give me a detailed 36-hour-specific protocol or a unique set of physiological claims that happen specifically at hour 36.

So I don't want to invent one.

The correct lesson from the existing material is:

Thirty-six hours is a longer fast and should be treated with more caution than ordinary intermittent fasting.

By this point, the metabolic changes that began earlier continue progressing: less dependence on incoming food, greater reliance on stored fuels, and generally increasing ketosis.

But there isn't a special:

“Hour 36 switch”

supported by the material.

48-Hour Fasting

A 48-hour fast means two full days without eating.

The source specifically includes this later in the fasting progression:

Intermittent fasting → 16 hours → OMAD → 24 hours → later consider 48 hours → only after building up, consider three days.

By day two, the fasting material describes a much larger shift toward stored fat and ketones.

You're relying much less on incoming carbohydrate and much more on stored energy, while your liver still produces some glucose because certain tissues require it.

But once again:

Everybody is different.

Don't chase somebody else's ketone number or assume your second day has to look exactly like theirs.

Multi-Day Fasting

Now we're talking about things such as:

Three days.Four days.Five days.Or longer.

This is where I become significantly more cautious.

Your source discusses multi-day fasting, including personal experience with longer fasting, but it repeatedly emphasizes that:

Longer doesn't automatically mean better.

A multi-day fast should not become:

“I did three days last time, so now I have to do five.”

Then:

“I did five, so now I need seven.”

That's turning fasting into an ego contest.

That's not the PayToCommit philosophy.

Fasting Isn't About Proving How Tough You Are

Your source puts this extremely well:

The goal isn't to prove you're tougher than your body.

If you're seriously unwell during a prolonged fast, finishing some arbitrary number of days should never become more important than your safety.

That's why:

Five days is not automatically better than three.

Three isn't automatically better than two.

Two isn't automatically better than one.

The best fasting schedule isn't the longest one you can survive.

It's the one that's appropriate for you and serves a useful purpose within the bigger lifestyle you're trying to build.

Hydration

Hydration becomes increasingly important as fasts become longer.

During a water fast, you are:

Abstaining from food—not water.

The source discusses drinking water throughout the fast and lists examples such as:

Spring water.Distilled water.Reverse-osmosis water.Basic mineral water.

One guideline in the material uses roughly half your body weight in ounces of water per day as a starting example.

But—and this matters—the source also says hydration needs differ from person to person.

So don't take one formula and turn it into an absolute prescription.

More water isn't automatically better either.

The larger lesson is:

Stay hydrated and pay attention to how you're feeling.

Electrolytes

Water isn't the only thing your material tells you to think about.

It also emphasizes:

Salt and minerals.

Examples discussed in the material include:

Redmond Real Salt.Sea salt.Pink salt.Himalayan salt.Unflavored mineral packets.

My personal approach is extremely simple:

Water + salt + minerals.

The source also expresses a preference for keeping mineral products unflavored because flavor may stimulate appetite in some people.

But don't hear:

“Electrolytes matter”

and translate that into:

“I should take unlimited salt and minerals.”

That's not what the material says.

Individual needs and health conditions matter.

Don't Ignore Warning Signs

If you're fasting and you become:

Shaky.Weak.Irritable.Confused.Dizzy.Or otherwise seriously unwell.

that is not something the source tells you to simply push through.

Especially with longer fasting, those symptoms need to be taken seriously.

Fasting is not:

“Ignore your body until the timer says you're finished.”

Who Should NOT Fast Without Medical Supervision?

This is one of the most important sections in the chapter.

The source specifically identifies several groups who should not casually jump into prolonged fasting.

That includes people who are:

Pregnant or breastfeeding.

Experiencing hypoglycemia.

Using insulin or certain glucose-lowering medications.

Taking multiple medications.

Dealing with gastritis or gastrointestinal problems that become worse with an empty stomach.

Very lean or underweight.

Malnourished or nutritionally depleted.

Iron deficient or dealing with other nutritional deficiencies.

Doing strenuous physical labor.

Living with significant medical conditions that could be affected by fasting.

Currently dealing with, or having a history of, an eating disorder.

The source also specifically discusses heavy alcohol use as a situation where nutritional depletion may already exist, making prolonged fasting potentially more problematic.

For those situations, prolonged fasting isn't something to experiment with casually.

Eating Disorders Deserve Special Attention

I especially want this made clear.

If somebody has an eating disorder or significant history of disordered eating, fasting should not become another tool for unhealthy restriction.

The purpose isn't:

“How little food can I possibly survive on?”

The source explicitly rejects that mindset.

That has nothing to do with what I'm trying to teach.

Very Lean and Highly Active People Need Extra Caution

Someone with a large amount of stored body fat who works at a desk all day isn't in exactly the same situation as somebody who is:

Very lean.

Highly active.

Doing hard physical labor.

Struggling to maintain body weight.

The source makes that distinction directly and says those people need to be especially careful about prolonged fasting.

Again:

Individual context matters.

Don't Combine a Long Fast With an Extreme Workout

This is another mistake I don't want you making.

You decide:

“I'm doing a three-day fast.”

Then you decide:

“I'm also going to train harder than I've ever trained.”

Why?

You're already asking your body to function for an extended period without incoming food.

The material recommends becoming more conservative with exercise as the fast becomes longer and using lighter activities such as:

Walking.Light calisthenics.Stretching.Yoga.Other mild movement.

The point isn't to prove how hard you can train without eating.

How You End a Long Fast Matters

If you've gone several days without eating, I don't want you ending the fast by immediately sitting down to the biggest meal you've eaten all year.

Your source repeatedly emphasizes:

Start slowly.

Use smaller portions.

Gradually bring food back in.

Don't overwhelm your digestive system immediately after an extended period without food.

The exact foods you choose afterward may depend on the eating plan you're following.

For me, I want to transition back into my Zapp the Fat Diet rather than using the end of a fast as an excuse to return to junk food.

What You Do After the Fast Is More Important Than Bragging About the Fast

You could fast for five days.

Post about it.

Tell everybody how disciplined you were.

Then immediately go back to:

Sugar.Chips.Junk food.Ultra-processed foods.Constant snacking.

What did you actually learn?

The source says one of the biggest lessons of prolonged fasting is becoming more aware of how much eating may be driven by:

Habit.Boredom.Cravings.Convenience.Stress.Social situations.Simply having food available.

That's what I want you learning.

Fasting is one tool.

It isn't the entire lifestyle.

The Fasting Progression I Want You to Remember

The source gives a progression I really like:

Clean up your diet.

↓

Begin intermittent fasting.

↓

Work toward approximately 16 hours if appropriate.

↓

Try OMAD if appropriate.

↓

Try 24 hours.

↓

Later, consider 48 hours.

↓

Only after building up and deciding it's appropriate, consider a three-day fast.

Notice what isn't there:

“Start with a five-day fast tomorrow.”

The message is:

Adapt gradually. Learn how your body responds.

That's completely consistent with everything else I've taught in PayToCommit.

Longer Doesn't Automatically Mean Better

That's what I want you remembering from this entire chapter.

Fasting isn't a competition.

A longer fast isn't automatically a more successful fast.

And somebody else's ability to fast for three or five days doesn't mean you should.

Your health.

Your medications.

Your nutritional status.

Your body composition.

Your activity.

Your history.

All matter.

The source itself states that 24-hour, 48-hour, and multi-day fasting aren't appropriate for everyone and recommends individualized professional guidance when medical or nutritional risk factors are present.

So keep fasting where I want everything else:

Simple. Intentional. Gradual.

Don't fast to punish yourself.

Don't fast because you're trying to prove you're tougher than somebody else.

Don't turn one longer fast into an excuse to ignore warning signs.

Use fasting as one tool within a larger commitment to changing the way you eat and live.

Simple = Success. Commitment = Accountability. Accountability = Results.

PayToCommit — Where You Put Money on the Line to Lose Weight by a Deadline.

this is all the data I have for the free PDF use that to ans

20. Ketosis

• What ketones are
• Nutritional ketosis
• Fat burning
• Ketone measurements
• Blood ketone meters
• Why ketosis isn't identical to fat loss
• Nutritional ketosis versus diabetic ketoacidosis