You know vitamin C is good for your skin. Brightening, antioxidant protection, collagen support — the research is solid and the results are real.
What most people don't know is that vitamin C cannot do its job alone.
Here's what I mean — and why it matters for every vitamin C serum you will ever buy.
How antioxidants actually work
Vitamin C is an antioxidant — it neutralizes free radicals by donating an electron to stabilize them. The problem is that this process consumes the vitamin C molecule. Once it has donated its electron, it has been "spent." It is no longer active as an antioxidant.
In a healthy system, spent vitamin C gets regenerated — converted back to its active form by other antioxidants in the network, primarily glutathione and vitamin E. The antioxidants work as a team. Vitamin C neutralizes the free radical. Vitamin E regenerates the vitamin C. Glutathione regenerates the vitamin E. The whole network stays active.
When you apply a vitamin C serum that contains only vitamin C — or vitamin C plus vitamin E but no glutathione — the regeneration chain breaks down. Vitamin C gets spent, vitamin E can only do so much to bring it back, and once the glutathione is depleted the whole system collapses.
This is why the first hour after applying vitamin C provides the most protection and the efficacy diminishes as the morning progresses. Your vitamin C is being spent faster than it can be regenerated.
Enter glutathione
Glutathione is the master antioxidant. Every cell in your body produces it specifically to manage oxidative stress. It sits at the foundation of the entire antioxidant network — regenerating vitamins C and E after they have done their work, protecting mitochondrial DNA from damage, and managing the cellular cleanup that prevents oxidative stress from accumulating.
As we age, glutathione production declines. UV exposure depletes it. Pollution depletes it. Stress depletes it. When glutathione is low, the antioxidant network becomes significantly less efficient even if you are applying vitamin C faithfully every morning.
Including topical glutathione in a vitamin C serum replenishes this foundation. The vitamin C keeps getting regenerated. The antioxidant network stays active longer. Your morning serum is still protecting you at lunchtime rather than being fully spent by 9am.
Finding effective glutathione in a retail vitamin C serum is genuinely rare. It appears in the Lira Clinical MYSTIQ Infused C Serum as one of the hero ingredients — and it is one of the primary reasons this formula performs differently from standard vitamin C serums.
Now meet ergothioneine
This is the one that stops me every time I look at this ingredient list.
Ergothioneine is an amino acid antioxidant originally discovered in ergot fungus and found in high concentrations in mushrooms. It has been studied extensively in pharmaceutical research for decades — most consumers have simply never encountered it.
What makes ergothioneine extraordinary is that human cells have a dedicated transporter protein — called OCTN1 — that actively pulls ergothioneine into the cell. Your body treats it as a nutrient it specifically needs rather than a foreign substance it is absorbing passively. No other known dietary antioxidant has this active cellular uptake mechanism.
The practical implications are significant. Most antioxidants applied topically sit on the skin surface or at best diffuse passively into the outer skin layers. Ergothioneine gets actively transported into cells — including skin cells — where it protects the mitochondria, the nucleus, and the cellular DNA from oxidative damage at a level that surface antioxidants cannot reach.
It is also exceptionally stable. Unlike vitamin C, ergothioneine does not degrade in the presence of other antioxidants or oxidize on contact with air. It stays active.
Pharmaceutical companies have been using ergothioneine in wound healing and recovery applications for years. Finding it in a professional retail serum is a meaningful statement about Lira Clinical's formulation philosophy.
And then there's CBD
I know. Every brand has CBD right now. Most of it is trend-chasing.
This one is doing something specific.
CBD is a documented anti-inflammatory and antioxidant. In this formula its role is precise — it calms the inflammatory signaling that can be triggered by active brightening ingredients and supports barrier function while the vitamin C complex does its work.
Active antioxidants and brightening ingredients can create mild inflammatory responses in reactive skin. CBD preemptively calms that response, making the formula more tolerable for sensitive skin while adding its own antioxidant contribution to the network. Its inclusion here is functional, not cosmetic.
What this means for your skin
The Lira Clinical MYSTIQ Infused C Serum is not a vitamin C serum with some extra ingredients. It is a comprehensive antioxidant system built around vitamin C.
The tetrahexyldecyl ascorbate — present at high concentration as the second ingredient — provides the primary vitamin C activity. Glutathione keeps the network regenerating. Ergothioneine protects at the cellular level. CBD calms the inflammatory response. Ascorbyl Palmitate and Ascorbic Acid complete the three-form vitamin C system at additional depths of the skin. The MASQ-tech™ dual complex, colloidal silver and gold, orange stem cells, and resurrection plant round out a formula that is addressing oxidative stress from every direction simultaneously.
This is what I mean when I say good vitamin C serums are rare.
You can find the Lira Clinical MYSTIQ Infused C Serum at Jasmine Skin Care + Lash Studio in Valley Village and online at jazskin.com.
→ <a href="/blogs/news/your-vitamin-c-serum-might-be-doing-nothing">Also read: Why your vitamin C serum might be doing absolutely nothing</a>
Jasmine Brinton
Esthetician | Skin Care Expert | Author & Researcher
Jasmine Skin Care + Lash Studio | Valley Village, CA
jazskin.com | (818) 669-0333
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