Nix Biosensors Announces SOS Hydration as a Preferred Hydration Partner, Advancing a New Model for Personalized Electrolyte Intake

March 11, 2026

Through Nix’s new Preferred Hydration Partner program, SOS helps turn sweat data into a personalized electrolyte strategy.

BOSTON, MASS. (March 11, 2026) /ENDURANCE SPORTSWIRE/ – Nix Biosensors, the leading provider of cutting-edge hydration monitoring technology, today announced a new partnership with SOS Hydration, naming SOS as the latest brand to join the Nix Preferred Hydration Partner program for hydration brands. The partnership reflects a broader evolution in hydration from one size fits all recommendations toward individualized guidance powered by real sweat data, while maintaining Nix’s science first, brand agnostic approach.

Nix’s Hydration Biosensor continuously measures fluid and electrolyte losses during activity and delivers insights in real time through the Nix app. Over time, Nix builds an individual sweat profile that supports confident, repeatable decisions based on physiology, not assumptions or general rules of thumb.

Built on the reality that electrolyte concentration needs can vary widely from person to person based on sweat composition and loss rates, the Nix Preferred Hydration Partner program helps users put that data into practice. Users can choose a participating brand and use their personal sweat profile to dial in the right powder to water ratio. Similarly, hydration brands will be identified in the Nix app as a preferred option when a user’s sweat composition aligns with that product’s formulation, helping translate sweat data into clear next steps. This gives users personalized guidance inside the app while allowing Nix to remain brand agnostic, matching individuals to options based on data rather than endorsing one brand over another.

For SOS customers, the benefit is straightforward: the partnership helps turn SOS usage into a personalized hydration strategy by helping customers learn exactly how much SOS to consume based on their individual sweat profile, reducing guesswork and increasing confidence in day to day routines and training. The partnership also creates a direct path to purchase from within the app, enabling users to buy the right product at the right time based on their personal hydration needs.

“Most athletes and everyday consumers are still guessing on electrolytes,” said Nix Biosensors CEO/Founder Meridith Cass. “Even if you already have a product you trust, the real question is how much of it you need for your personal biology, today, in these specific conditions. Nix quantifies your sweat losses and composition to turn that guesswork into a personalized plan, and our Preferred Partner Program uses our scientific foundation and one of the world’s largest sweat and hydration datasets to help brands move beyond one size fits all serving guidance toward recommendations that reflect users personal physiology.”

“This partnership is a new model for how hydration brands and data can work together,” said James Mayo, CEO at SOS Hydration. “People have more hydration options than ever, but they still lack a clear way to know precisely how much they need for their body. By plugging SOS into the Nix platform as a Preferred Partner, we can help customers translate individualized sweat insights into a hydration plan and understand exactly how to use SOS as part of a routine tailored to their needs, with more precise and actionable guidance.”

The SOS partnership builds on Nix’s momentum and existing work with hydration brands in the endurance ecosystem, including its relationship with Infinit Nutrition. Together, these partnerships signal a future where hydration brands can integrate personalization directly into the customer experience, and where consumers can move from trial and error to data driven decisions.

For more information, visit nixbiosensors.com and learn more about SOS Hydration at soshydration.com.

Media Contact

Mackenzie Lynch
mackenzie@igtstudio.com
360.319.3833

About Nix Biosensors:

Nix is changing the way humans manage health by empowering consumers to access, understand, and act on their personal biology in real time. Nix’s first consumer product is a sweat patch that provides athletes, soldiers, and laborers with hydration data in real-time, helping them optimize safety and performance. Headquartered in Boston, Massachusetts, Nix is founded by CEO Meridith Cass, a graduate of Harvard Business School, former VC, and 9-time marathoner. Advisors include Tom Fowler, Former President of Polar; Dr. Bob Murray, Founder and former Director of the Gatorade Sports Science Institute; Shalane Flanagan, 4x Olympian, Silver Medalist, and 2017 NYC Marathon Champion; and Tatyana McFadden, the 7x Paralympian and 22x Medalist, with 24 World Major medals. Learn more at nixbiosensors.com.

About SOS Hydration

SOS Hydration is a research backed electrolyte hydration company founded by triathlete

James Mayo and built on a simple principle: hydration should be optimized for absorption and performance, not just flavor. Designed to hydrate up to four times faster than water alone, SOS combines electrolytes with a precisely balanced amount of glucose to accelerate fluid uptake in the body. The science is straightforward: hydration requires a small amount of glucose to transport electrolytes and water efficiently. Too little sugar slows absorption; too much sugar hinders it. SOS strikes the optimal balance, allowing fluids and electrolytes to move quickly where the body needs them most.

Originally developed to support endurance training without the heavy sweetness or stomach issues common in traditional sports drinks, SOS has become a trusted hydration solution for

triathletes, cyclists, runners, and other performance-focused athletes, as well as individuals looking to stay hydrated during travel, work, exercise, and recovery. SOS Hydration is available in convenient stick packs and tubs and is sold direct-to-consumer at

soshydration.com, on Amazon, and through select retail partners including CVS.

You can find SOS at www.soshydration.com