Paresthesia is a harmless tingling sensation that many people feel after ingesting instant release beta-alanine. As the paresthesia threshold varies from person to person the level of tingling experienced may vary.

Sustained RX^® products contain the only beta-alanine established as a New Dietary Ingredient (NDI) by the FDA. Utilizing an NDI ingredient reaffirms our commitment to delivering the highest-quality supplements, and further distinguishes our brand from generic forms of beta-alanine and carnosine with questionable quality and effectiveness.

GRAS is an acronym for the phrase Generally Recognized As Safe. An ingredient that is self-affirmed GRAS means it is as safe as food, which is recognized and evaluated by experts with scientific training and experience. Sustained RX^® products contain the only beta-alanine with self-affirmed GRAS status.

All Sustained RX^® products are manufactured at FDA registered facilities, under a stringent quality control process which complies with current Good Manufacturing Practice regulations enforced by the FDA, and various other national and international agencies—to be both safe and effective—containing zero banned substances, allergens, or gluten.

Orders are shipped via Amazon and shipped order confirmation emails are provided with tracking links once orders leave their facility.

We offer a 30-day money back guarantee. If you are dissatisfied for any reason, please contact Customer Service for assistance via email at support@sustainedrx.com or via phone at 1-800-848-2636.

Everyone can benefit from increased levels of carnosine in their bodies. Vegans and vegetarians in particular can benefit as their diets don’t contain the animal proteins found in meat, fish, and poultry, which are the main food sources of beta-alanine and carnosine.

Ingested carnosine breaks down in the body into beta-alanine and histidine when absorbed from the digestive system into the bloodstream, and only trace amounts of beta-alanine and carnosine are delivered to the cells. Research has shown that enough histidine is naturally present in the body to meet the demands for synthesis of carnosine, and that the limiting factor is beta-alanine. Beta-alanine supplementation augments the small amounts available from (1) synthesis in the liver, and (2) from the ingestion of meat and fish. Supplemental beta-alanine combines with the naturally occurring histidine to increase the levels of carnosine.

As muscle mass and systemic functions decrease with age, so do carnosine levels. Perfect Synergy^® beta-alanine supports increased carnosine, which can help maintain higher levels of brain, bone, heart, muscle, and systemic function in aging populations.

Perfect Synergy^® combines with the amino acid histidine to form the dipeptide carnosine. Supplementation with Perfect Synergy^® has been proven to boost carnosine levels by peer reviewed scientific research. Carnosine, shown by thousands of independent scientific studies, has been proven to support brain, heart, muscle, bone, and systemic health.

Perfect Synergy^® is powered by SR CarnoSyn^®, a sustained release formulation of beta-alanine which is essential to the body’s production of carnosine. This uniquely formulated sustained release formula enables larger servings of beta-alanine to be taken without reaching the paresthesia-sensation threshold typically associated with beta-alanine supplementation.

Perfect Synergy^® features a sustained release profile designed to buffer paresthesia associated with instant release beta-alanine. Sensitivity may vary depending upon the individual, the dosage amount, and the variety of food intake prior to supplementing with Perfect Synergy^®.

Perfect Synergy^® beta-alanine is suitable for both vegans and vegetarians. Since beta-alanine is most often found in meat sources, it is critical for vegans and vegetarians to supplement beta-alanine to ensure healthy levels of carnosine. For vegans specifically, the only other source of beta-alanine is synthesis in the liver, however the level of beta-alanine synthesized in the liver is very low in humans and can only maintain low levels of carnosine production.

Perfect Synergy^® is 100% Non-GMO.

Perfect Synergy^® is completely free of major allergens. It is gluten free, suitable for vegans and vegetarians, and kosher and halal.

Tablets have a 2-year shelf life when stored tightly sealed in its original container in a cool, dry location.

Perfect Synergy^® is tasteless and odorless.

Perfect Synergy^® tablets are midsized, oval-shaped, and coated, making them easy to swallow. Dosing has been perfected to deliver 2.4 grams of beta-alanine in the form of two tablets taken twice daily.

Perfect Synergy contains SR CarnoSyn^® beta-alanine which is the only beta-alanine that has successfully obtained FDA New Dietary Ingredient and self-affirmed Generally Recognized As Safe (GRAS) status. SR CarnoSyn^® is scientifically proven to be safe and effective and is supported by 55 peer-reviewed clinical studies. The other ingredients provide the patented sustained-release delivery system. This system has been reviewed by professional panels and is proven to be safe.

For general wellness and healthy aging the serving size is 2.4 active grams of Perfect Synergy^® per day. This equates to 2 Perfect Synergy^® tablets taken twice a day.