23% Pure Vitamin C Serum

Meet your targeted solution for dullness and uneven tone. This concentrated serum delivers a powerful 23% dose of pure Vitamin C, stabilized and complemented by Vitamin E and Panthenol to brighten effectively while maintaining essential hydration and comfort.

Powerful, Purposed Ingredients

This serum’s formula is intentionally crafted for high efficacy. Its key features—from the specific concentration of pure Vitamin C to its complementary hydrators—work together to deliver visible results while caring for your skin’s barrier.

Visible Brightening

Reveal a Radiant, Even-Toned Complexion

Targets Uneven Skin Tone

The high-purity Vitamin C works to visibly diminish dullness and dark spots, promoting a more uniform and luminous skin tone. It’s a targeted approach to achieving the clarity your skin deserves.

Hydrates While It Brightens

Beyond surface-level brightness, this serum provides a surge of hydration with Panthenol and Vitamin E, helping to fortify the skin’s moisture barrier for a supple, healthy feel.

Defends Against Dullness

A potent, antioxidant-rich formula designed to help shield skin from environmental stressors that can lead to a tired, lackluster appearance, supporting long-term skin vitality.

Who It's For

Ideal For These Skin Goals

Uneven Tone

Addressing Dark Spots

Specifically formulated to target areas of hyperpigmentation, dark spots, and post-acne marks, promoting a visibly more uniform and clear complexion over time.

Defending Against Stressors

Antioxidant Care

Perfect for anyone looking to add a powerful antioxidant step to their routine, helping to defend skin from daily environmental aggressors that accelerate visible aging.

Advanced Care

Elevating Your Regimen

For seasoned users wanting a potent Vitamin C boost, this 23% formula helps elevate a routine, enhancing visible radiance and refining texture over time.

Application Guide

How to Use for Best Results

Incorporating this high-potency serum effectively is key to unlocking its benefits while maintaining skin comfort. Follow these steps to introduce it properly and maximize its brightening potential in your daily or weekly regimen.

Start with a Clean, Dry Canvas

Begin your evening or morning routine with a freshly cleansed and toned face. Ensuring the skin is completely dry before application helps the serum absorb properly and minimizes the potential for a tingling sensation on damp skin.

Apply a Few Drops to Fingertips

Dispense 2-3 drops of the Isntree Hyper Vitamin C 23 Serum onto your fingertips. This targeted amount is sufficient for the face and neck, ensuring even distribution without waste. The slightly viscous texture allows for controlled application.

Pat Gently into Skin, Avoiding the Eye Area

Using your fingertips, gently pat the serum into your face and neck, avoiding the delicate eye and mouth areas. Allow it to fully absorb for a minute before layering your next product, like a moisturizer, to lock in the benefits and provide hydration.

I've used many Vitamin C serums, but this one's 23% concentration is seriously effective. My skin felt a slight tingle at first, which subsided. After a few weeks, my dark spots have faded and my overall complexion is much brighter and more even. A little goes a very long way.

As someone familiar with ascorbic acid, I appreciate this formula's high potency. The addition of Panthenol is smart, as it helps counteract potential dryness. It absorbs quickly and doesn't leave a greasy residue. My skin looks more vibrant and feels firmer with consistent use.

This serum is potent! I recommend starting slowly, maybe every other day. I did experience some mild stinging initially, but my skin adjusted. Now, I use it a few times a week and my skin's radiance has noticeably improved. It's a strong but rewarding product.

I was hesitant due to the high percentage, but I patch-tested carefully. After building tolerance, I use it twice weekly. It's definitely active—my skin feels a bit warm upon application. The payoff is in the glow; my face looks clearer and more luminous than before.

The serum has a lightweight, slightly viscous texture that sinks in well. I was concerned about potential dryness from pure Vitamin C, but this formula feels hydrating. It has helped refine my skin's texture and reduce the appearance of pores. A standout in my lineup.

Real User Feedback

What Our Community Says

Real users share their firsthand experience with this potent Vitamin C treatment, noting its noticeable effects on skin clarity and the initial adjustment period that comes with a high-concentration formula.

Your Questions, Answered

Understanding this potent serum’s specifics helps ensure it fits seamlessly into your routine. We’ve addressed common questions about its high concentration, ideal user, and application for the best results.

What skin type is the Isntree Hyper Vitamin C 23 Serum best suited for?

This serum is ideal for normal, combination, and oily skin types looking to address dullness and uneven tone. Those with sensitive skin should patch test and introduce it slowly, as the high 23% Vitamin C concentration can be potent. It’s formulated with Panthenol to help soothe and support the skin barrier during use.

How should I incorporate this high-concentration serum into my existing routine?

Start by applying it every other day or 2-3 times a week after cleansing and toning, before heavier moisturizers. If your skin tolerates it well, you can gradually increase frequency to daily use. Always follow with a broad-spectrum sunscreen in the morning, as Vitamin C can increase photosensitivity.

Can I use this serum with other active ingredients like retinol or AHAs?

It’s best to avoid using this potent serum simultaneously with other strong actives like retinoids or exfoliating acids to minimize potential irritation. Consider using them on alternate nights. For example, apply the Vitamin C serum in the morning for antioxidant protection and use retinol in your evening routine.

What results can I realistically expect, and how quickly will I see them?

With consistent use, most users report brighter, more even-toned skin and a reduction in dark spots within 4-8 weeks. The initial tingle may subside as your skin builds tolerance. For optimal results, use it consistently for at least 3 months, as skin cell turnover cycles take time to show visible improvement.

Is the Vitamin C in this formula stable, and how should I store the product?

Yes, the formula uses stabilized pure Vitamin C (L-Ascorbic Acid) at a high 23% concentration. To maintain its potency, store the bottle in a cool, dark place away from direct sunlight and heat. The dropper bottle design helps minimize air exposure, which is key for preserving the formula’s integrity over time.

Why does the serum have a slight yellow tint, and is that normal?

The slight golden-yellow hue is normal for high-purity, stabilized Vitamin C serums. It indicates the presence of pure L-Ascorbic Acid and other beneficial ingredients like Panthenol and Vitamin E. This coloration does not affect the product’s efficacy or safety; it’s a characteristic of the concentrated, active formula.

Build Your Routine

Complete Your Skincare Regimen

Your skincare journey doesn’t end with a single product. Discover complementary items from Isntree, like hydrating toners or soothing sunscreens, to build a complete, synergistic routine that supports your skin’s overall health and radiance.

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