Before treatment begins, stem cells are preserved through cryopreservation – frozen at extremely low temperatures, typically in liquid nitrogen at around -196°C, where all biological activity halts and cells remain viable for years or even decades without significant loss of potency. Stem cell therapy in India follows a structured sequence before reaching that storage stage: cells are collected from the relevant source – cord blood, bone marrow, or peripheral blood – processed to isolate the target stem cell population, and combined with a cryoprotectant solution to protect against ice crystal damage before going into liquid nitrogen storage.
According to a specialist at MedTravellers, Regenerative Medicine Centre in New Delhi.
“The quality of stem cells at the point of administration is only as good as the storage process that preceded it. That’s not a detail – it’s the foundation of whether the treatment delivers what it’s supposed to.”
Why does what happens before the injection matter this much?
Storage is the part of stem cell therapy most patients never ask about – because it’s invisible. By the time you’re in the treatment room, it’s already done. But what happened in the laboratory before that moment shapes what you’re actually receiving more than most people realise:
- Viability degrades faster than expected: Outside a controlled environment, stem cells start losing viability quickly. Temperature variation, processing delays, or suboptimal conditions can drop functional cell percentage significantly. A sample at 95% viability at collection arriving at 60% at administration isn’t delivering the same treatment – that gap is entirely determined by storage.
- Alive and functional aren’t the same thing: A cell can be technically viable but still not perform its repair function. Incorrect temperatures, excessive storage duration, or non-GMP processing can leave cells technically alive but with significantly degraded capacity to differentiate or release growth factors.
- Contamination is a real patient safety risk: Outside GMP-compliant laboratories, stem cell samples face genuine bacterial, fungal, and environmental contamination risks. A contaminated sample can’t be administered safely regardless of everything else. GMP compliance isn’t a subtle technical distinction – it’s a safety one.
- Different cell sources need different storage protocols: Bone marrow, adipose, umbilical cord, and peripheral blood-derived cells have different sensitivities and processing requirements. A one-size storage protocol across all cell sources is a sign the process isn’t rigorous enough.
Most patients asking about storage are really asking one thing: how do I know the cells I’m receiving are still good? The answer lives entirely in whether the storage process was done properly.
What's actually happening to the cells between collection and the day of treatment?
Walking through this step by step matters because the sequence is where the quality gets built in – or where it gets lost:
- Isolation and purification immediately after collection: The moment cells are harvested, the clock starts on processing. Delays introduce risk that compounds through everything that follows. Moving quickly from collection to isolation under controlled conditions is what protects sample quality from the outset.
- Cryopreservation for storage beyond a short window: Cells are held in liquid nitrogen at around -196°C. A cryoprotectant is introduced before freezing to prevent ice crystal formation inside the cells – ice crystals are what destroy cells when freezing is done incorrectly. The cryoprotectant keeps cells structurally intact through the temperature transition.
- Controlled-rate freezing: Freezing too quickly causes ice crystal damage. Freezing too slowly causes osmotic stress. Controlled-rate freezing equipment manages the temperature drop at around 1°C per minute through the critical range – minimising cellular damage during the transition. It sounds like a detail. It isn’t.
- Thawing is just as technically demanding: Rapid warming in a controlled water bath at 37°C, immediate cryoprotectant dilution, and prompt administration after thawing are all part of a protocol designed to get cells from storage to the patient in the best possible functional state. The thaw is where careless handling undoes everything the storage process protected.
The how stem cell therapy works page covers the full sequence from collection through to administration for anyone who wants to go deeper into the process before making a decision.
What's being checked before stored cells are cleared for use?
This is the part that directly answers the question patients are usually really asking – how do I know what I’m receiving is actually good:
- Independent third-party viability testing: Every sample goes through external laboratory testing before clearance – cell count and viability percentage verified by a third party, not self-reported. Results go directly to the patient. Samples that don’t meet minimum viability thresholds don’t get administered. Full stop.
- Sterility testing before release: Stored samples are tested for bacterial and fungal contamination before use. Failed samples get rejected regardless of viability numbers – no workaround, no exception. This is what GMP compliance actually means in practice, not just a certification on the wall.
- Chain of custody documentation: For autologous procedures, documentation tracking cells from collection through processing, storage, and administration has to be airtight. The right cells must reach the right patient – and any reputable facility should provide this documentation without hesitation.
- Potency assessment beyond viability: The most rigorous protocols test whether stored cells retain the functional capacity to perform repair and regenerative activity – not just whether they’re alive. Not every facility applies this standard, and the ones that do are operating at a meaningfully different level.
Get a personalized treatment plan tailored to your needs by connecting with experienced stem cell specialists in India.
Why choose MedTravellers for stem cell therapy?
Storage quality is invisible to patients but one of the most significant variables in whether outcomes match expectations. A well-executed procedure with poorly stored cells isn’t a well-executed procedure – it’s a well-executed delivery of compromised material.
MedTravellers has treated 5,000+ patients from 40+ countries over 15+ years, with an 80% reported improvement rate across neurological, orthopaedic, organ-specific, and eye conditions. Built around the mission of Empowering Health, Enhancing Life, every patient receives an independent third-party laboratory certificate confirming cell count and viability before anything is administered – externally verified, not self-reported. Cells are processed in GMP-compliant laboratories, chain of custody is maintained throughout, and the storage and thawing protocols applied are the ones clinical outcomes actually depend on. Quarterly follow-ups run for two full years with the plan adjusting based on what the clinical picture is showing. For patients who want to know every step was done properly – not just the injection – that level of documented quality control is what MedTravellers builds in from the start.
FAQ
Stem cells are preserved through cryopreservation – frozen at around -196°C in liquid nitrogen tanks with a cryoprotectant to maintain viability.
With proper cryopreservation, stem cells can be stored for extended periods without significant loss of viability or potency.
A cryoprotectant is a solution mixed with stem cells before freezing to prevent ice crystal formation that would otherwise damage or destroy the cells.
Reputable facilities provide independent third-party laboratory certificates confirming cell count and viability before administration.
Reference
- U.S. National Library of Medicine (PubMed) – Cryopreservation of Mesenchymal Stem Cells and Effect on Cell Viability https://pubmed.ncbi.nlm.nih.gov/29458153/
- U.S. National Library of Medicine (PubMed) – Quality Control and Storage of Stem Cells for Clinical Use https://pubmed.ncbi.nlm.nih.gov/27423448/