The world's first multivitamin built for fasting.

For the 11am hunger wall.

Seven healthy ingredients crush hunger, sustain energy, and keep your mind sharp through your longest stretches. Made in the USA, third-party tested.

Try Core — $39

A functional, science-driven stack designed for fasting physiology.

L-Theanine

Elevate mental clarity and calmness

SHR-5 Rhodiola

Adaptogenic stress response

Affron®

Help reduce snacking urges

Chromium

Support insulin sensitivity and help reduce hunger spikes

Thiamine

Help prevent re-feeding syndrome

Magnesium + Potassium

Promote ATP formation and boost energy

Engineered for Fasting.

One capsule system. Multiple roles across the fasting day.

Hour 0–4

Metabolic transition

Your last meal winds down and insulin begins to fall, starting the shift away from sugar for fuel.

ThiamineMagnesium
Energy metabolism support
Hour 4–8

Electrolyte flush

As insulin drops, your body sheds water and key minerals — this is when headaches and cramps can begin.

MagnesiumPotassium
Electrolyte and mineral repletion
Hour 8–14

Peak cravings

Hunger and cravings tend to peak here — often the hardest stretch of the fast.

Affron® SaffronChromium
Blood-sugar and mood support
Hour 14–18

Cognitive demand

Mental fatigue and stress can build as the fast deepens and focus gets harder to hold.

Rhodiola SHR-5L-Theanine
Stress-response and focus support
Hour 18–24+

Re-feeding window

Breaking your fast can bring an energy dip. Support a smooth transition back to food.

ThiamineMagnesium
Carbohydrate metabolism support

Educational visualization of fasting phases and ingredient roles.

Built on published clinical research

We formulate with facts.

Every active in Core was chosen for the human trials behind it. We use Affron®, the standardized saffron extract studied in published RCTs for satiety and mood. We use SHR-5 Rhodiola, the specific extract used in the clinical literature on cortisol and cognitive performance. Same standard for thiamine, magnesium, and chromium: clinical-grade forms at evidence-based doses.

Try Core — $39
  • MADE IN THE USA

    Proudly crafted in the USA with ultra-premium ingredients you can trust.

  • FREE 2-4 DAY SHIPPING

    Free 2-4 day USA shipping with tracking on all orders. 

  • NO HASSLE 30 DAY RETURNS

    No hassle 30 day returns on unopened packages.

  • THIRD-PARTY TESTED

    Produced in a FDA-registered, GMP-certified facility for purity and safety.