3g of MyHMB*
2.4g of PeptiStrong*
2g of CreGAAtine

PeptiSize™ was developed for one purpose: to help you build more muscle from every rep, every session, and every training block. This powerful formula combines three of the most scientifically advanced muscle-support ingredients available on the market today—myHMB®, PeptiStrong®, and CreGAAtine®. This unique blend comes together to create a powerful, multi-pathway system that not only amplifies growth and protects muscle tissue but drives performance in a way traditional supplements simply can’t.

Each ingredient targets a different, but equally critical, aspect of the muscle-building process. myHMB® has been clinically shown to reduce muscle breakdown and stabilize muscle tissue under heavy training stress. PeptiStrong®, a cutting-edge fava-derived peptide technology, increases muscle protein synthesis, enhances recovery, and supports anti-atrophy signaling. And CreGAAtine®, a unique creatine monohydrate and guanidinoacetic acid blend, supercharges strength and performance by elevating phosphocreatine levels far more effectively than standard creatine monohydrate.

Together, these three ingredients work in synergy to create a high-anabolic, low-catabolic training environment—allowing athletes to train harder, recover faster, and build muscle more efficiently than ever before.

myHMB® (β-Hydroxy β-Methylbutyrate)

myHMB® (β-Hydroxy β-Methylbutyrate) is one of the most research-validated ingredients for preserving and building lean muscle tissue. As a downstream metabolite of leucine, HMB plays a critical role in muscle protein turnover, specifically by reducing muscle protein breakdown while also supporting anabolic signaling. Human studies done in populations including athletes, aging adults, and clinical populations, repeatedly show that HMB is effective at helping to preserve muscle mass during intense training, caloric deficits, immobilization, or high-stress environments. Its unique properties lie in its ability to stabilize muscle cell membranes, significantly slow down catabolism, and accelerate recovery so active individuals can train harder, more frequently, and with less muscle soreness.

What makes myHMB® particularly powerful is its dual mechanism: it upregulates mTOR, promoting muscle building, while downregulating the ubiquitin–proteasome pathway, reducing muscle breakdown. This dual action creates a favorable environment for strength, hypertrophy, and recovery compared to just leucine alone.

CreGAAtine®

CreGAAtine® is an innovative ingredient combining creatine monohydrate and guanidinoacetic acid (GAA), the precursor to creatine. Let’s break this ingredient down into two separate parts and summarize how the combination of these two compounds works together to produce desired results.