Dr. Jekyll® Signature is designed to push you through the toughest training sessions, without any stimulants. Perfect for those who train at night, or are simply not a fan of caffeine.†

Dr. Jekyll® Signature is the only all-in-one stimulant-free pre-workout that addresses all key functions that support exercise performance, cognitive function, enhanced strength, improved endurance, blood flow, thermogenesis, and adaptogenesis.†

Essential Amino Acids (EAAs) are crucial for muscle protein synthesis, helping to support muscle growth, strength, and recovery, making them an essential part of your fitness routine.†

BCAAs, or Branched-Chain Amino Acids, are a group of three essential amino acids: leucine, isoleucine, and valine. These amino acids are called "essential" because your body can’t produce them on its own, so you need to get them from food or supplements. BCAAs play a huge role in muscle recovery and growth. Leucine is the powerhouse that kicks off protein synthesis, which is basically the process your muscles go through to repair and grow after a workout. Isoleucine helps with energy production during exercise and assists in muscle repair, while valine helps prevent muscle breakdown. Together, they help reduce muscle soreness, improve endurance, and support muscle recovery, especially after intense workouts.†

How does Pro Series EAA + Electrolytes support hydration?

Glutamine is considered a conditionally essential amino acid, meaning that while the body can produce it under normal circumstances, sometimes the demand for glutamine exceeds the body's ability to produce it, making it essential to obtain from diet or supplements. L-glutamine is essential for protein synthesis, contributing to the building and preservation of lean muscle mass.

Numerous scientific studies have shown that glutamine plays a major role in nitrogen transportation and muscle tissue maintenance. Glutamine also acts as a primary fuel source to help naturally boost the cells of the immune and digestive systems. Supplementing with glutamine allows your muscles to fight and push further, boosting your strength and repairing your skeletal muscles.†

Dr. Jekyll Signature proudly carries the Informed-Choice certification badge. Informed-Choice® is a globally recognized third-party quality assurance program for nutritional supplements. Products that carry the Informed-Choice® logo undergo rigorous routine testing and manufacturing audits and have been tested for more than 220 banned substances prohibited in sports by LGC’s world-class anti-doping labs. Athletes and fitness advocates can trust ProSupps® Dr. Jekyll Signature knowing that our products are not only effective but certified for us in most sports. Visit www.informed-choice.org for more information or consult with your athletic association.

ProSupps' dedication to quality and integrity means that we never cut corners and we always put your health and performance FIRST. ProSupps products contain zero fillers, zero banned substances and zero FD&C dyes. Every ProSupps product goes through rigorous third-party testing for purity, efficacy and transparency. EVERY BATCH. EVERY TIME.