Hours 0 to 4
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01Hours 0 to 4image
The shift
Your last meal winds down and insulin starts to fall. The body begins moving off sugar as its main fuel.
What helps Trace
Supplements designed for your fasting physiology.
A routine built for the fasting state, grounded in published human research.
Made for fasting
Fasting changes what your body needs.
A fast is not a smaller version of a fed day. Minerals leave faster, hunger peaks on a schedule, and focus has to come from a different fuel. Kētos is a supplement stack formulated for that physiology: Trace carries hydration across the hours, and Core steadies the hardest ones.
Won't break your fast
Engineered by fasters
Third-party tested
Research-backed ingredients
Supplements built for your fasting goals.
Kētos is built to support the fast, every hour of it. There's a formula for you if you:
- Want an easier, more comfortable fast
- Hit an afternoon energy or focus dip
- Get headaches, cramps, or fasting fog
- Want to support your fast without breaking it
- Are optimizing for longevity or on a GLP-1 journey
Lifestyle
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The fasting system
A fast moves through phases.
Each stretch of the fast asks your body for something different. Here is what changes, hour by hour, and where the routine meets it.
Hours 4 to 12
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02Hours 4 to 12image
The hunger wall
Hunger and cravings tend to peak, minerals keep leaving, and focus gets harder to hold. The hardest stretch of the fast.
What helps Core
Hours 12 and beyond
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03Hours 12 and beyondimage
The deep fast
The body settles into fat for fuel and the benefits people fast for deepen. Staying hydrated is what carries you here.
What helps Trace
Time is the ingredient.
Metabolism is a matter of when. Core meets the hardest hours of the morning, and Trace carries minerals across the whole fast.
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Stack ritual still life
Core capsules + Trace bottle
Core capsules + Trace bottle
The stack.
Two products, each built for a different stretch of the fast. Start with one, or run them together.
The fasting physiology
Your body runs a switch.
For the first hours after a meal your body runs on glucose. As a fast continues it shifts its main fuel to fat and ketones. That crossover, around 12 to 16 hours in, is the metabolic switch.
Years of research in every batch
The ingredients
Every active is chosen for the human trials behind it.
Satiereal saffron, SHR-5 rhodiola, L-theanine, and the rest were each selected for the published human research behind them, not for a label full of names.
The ingredients
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Bioavailable forms
Delivered in a form the body can actually use.
Trace buffers its minerals with citrate and pairs them with BetaPower betaine. Core uses standardized extracts like Satiereal saffron and SHR-5 rhodiola. The form is the difference between a name on a label and a nutrient your body absorbs.
The same citrate carrier. The mineral ion is what changes.
Tested every batch
Third-party tested, every batch.
Made in a cGMP-registered facility in the USA and screened for what is on the label and what should not be. The certificate of analysis is on the record.
Tested every batch
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Not sure where to start?
Find the routine built for your fast.
A few questions about how you fast, and we will point you to the products (or none at all) that actually fit.
From the Journal
Do Electrolytes Break a Fast?
Go deeper into the science of fasting with The Metabolist, our library of field notes and research on the fast.
Fast with the whole system behind you.
Start where it helps most. The routine is built to grow with you.
