YOUR NEW FOUNDATION IS HERE.

PIONEERING MALE PERFORMANCE

A precision system designed to help you stay in your prime for longer.

Foundation KSM-66® Shop All

A systematic approach for men who demand precision, performance, and longevity.

STAY IN YOUR PRIME

Rein Performance Systems® is here → Shop now

FOUNDATION®

Hormonal Base Layer

Foundation® is where optimisation begins.

1,000mg KSM-66® Ashwagandha. Clinically studied. Systematically engineered for men’s performance.

Precision Supplements. Proven Results.

Community Reviews

Peppe C.

"Really good quality products and great supplements! Worth it to try!"

David R.

“I’ve tried a lot of supplements over the years, but this one feels different. Within about two weeks of taking REIN Foundation daily, I noticed I was calmer under pressure and recovering better after training. 

Mark T.

“As someone juggling a demanding job and family life, stress management is everything. Since starting Foundation, I feel more balanced — less irritable, more focused, and with a steady energy throughout the day.”

Alex P.

“I hit the gym 5 times a week, and recovery has always been my weak point. REIN Foundation has been a game-changer. I’m not as sore after heavy sessions, and I’ve noticed my strength is creeping up faster."

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