MEDITHERAPY Retinal Skin Booster Serum 150ml Review

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MEDITHERAPY Retinal Skin Booster Serum 150ml Review: A Look at the Large-Format Retinal Booster

The skincare market is full of retinoid serums with impressive claims and tiny bottles. MEDITHERAPY’s Retinal Skin Booster Serum breaks from this pattern in the most appealing way possible: a retinaldehyde formula in a 150ml bottle. For users who have discovered retinal and want to commit to it long-term, this is the kind of value proposition that changes routines. Here is the complete breakdown.

MEDITHERAPY Retinal Skin Booster Face&Body Serum for Uneven Skin 5.07 fl.oz

Included for 'MEDITHERAPY Retinal Skin Booster Serum 150ml Review' as a representative home product in this roundup; selection reflects the product set returned for this topic.

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PURITO Retinol 0.1% + Retinal 0.1% Serum for Sensitive Skin, 1.01 fl.oz

Included for 'MEDITHERAPY Retinal Skin Booster Serum 150ml Review' as a representative home product in this roundup; selection reflects the product set returned for this topic.

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Updated October 2026 — MEDITHERAPY Retinal Skin Booster Serum review, short answer: it is a large-format (150 ml) retinal serum with niacinamide, centella and ceramide ingredients that most reviewers describe as light and gentle for a retinoid. It is a good value for people who already tolerate retinoids, but it is still a retinoid: start slowly, patch-test, wear sunscreen daily and avoid it in pregnancy.

Three picks to know: the MEDITHERAPY Retinal Skin Booster Serum (this review), the celimax The Vita A Retinal Shot Tightening Booster (a small, stronger-tier retinal) and the Dr.Althea 0.1% Gentle Retinol Serum (a retinol and bakuchiol option).

MEDITHERAPY Retinal Skin Booster Serum at a Glance

Retinal percentages are a point of confusion. The maker of MEDITHERAPY does not prominently publish a percentage, so compare formulas by the ingredient list and by how your own skin responds. Formulas vary by batch and region.

Product Overview

MEDITHERAPY Retinal Skin Booster Face&Body Serum for Uneven Skin 5.07 fl.oz

Included for 'MEDITHERAPY Retinal Skin Booster Serum 150ml Review' as a representative home product in this roundup; selection reflects the product set returned for this topic.

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The 150ml Advantage: Why Size Matters for Retinal

Retinal skincare is not a one-week experiment. To see meaningful anti-aging results, you need consistent use over months. Most retinal serums come in 30ml bottles — which, at regular application during skin acclimation, runs out faster than users expect.

MEDITHERAPY’s 150ml bottle changes the calculus entirely:

• As a large bottle, 150ml can last several months of regular use, depending on how much you apply
• Cost per ml is typically lower than small-format serums
• You maintain formula consistency throughout treatment — no reformulation risk with bottle changes
• Reduces purchasing friction, which improves compliance and results

For users who have graduated from the test phase and are ready to make retinal a permanent routine fixture, this format is purpose-built.

The Hero Ingredients: Retinal + Niacinamide

Retinaldehyde: Potency With Gentleness

MEDITHERAPY uses retinaldehyde rather than retinol — a meaningful formulation decision. Retinal is one conversion step from retinoic acid (retinol needs two), which is why it is often chosen as a step up from retinol. Retinoids are generally used for:

• Smoother-looking skin texture
• Supporting the look of firmer skin
• Softening the look of fine lines
• Making pores look less noticeable

Niacinamide: The Brightening Synergy Partner

Retinal and niacinamide are a common pairing in retinoid formulas. Niacinamide (Vitamin B3) in this context is generally used for:

• Tone: Helps with the look of uneven tone
• Barrier support: May help support the skin barrier alongside a retinoid
• Comfort: Commonly used to help skin feel calmer
• Oil balance: Commonly used for oily skin types
• Pore appearance: May make pores look less noticeable

Together, they target fine lines, uneven skin tone, and texture, though individual results vary.

How Much Retinal Is in MEDITHERAPY Retinal Skin Booster Serum?

Searches such as “how much retinal MEDITHERAPY” are common, and the honest answer is that the exact percentage is not a headline figure on the product. One reviewer cites about 0.01%. We could not confirm that figure from a maker source, so treat it as unverified. What we can verify is the ingredient order in the published INCI list: retinal appears well past the midpoint, after sodium hyaluronate and cholesterol, which points to a low level. That is consistent with how gentle the serum feels in reviews.

Ingredient highlights (INCI as published by retailers)

• Base: water, methylpropanediol, glycerin, caprylic/capric triglyceride and propanediol.
• Niacinamide: listed in the first ten ingredients.
• Retinal: alongside a vitamin C derivative (ascorbyl tetraisopalmitate and sodium ascorbyl phosphate) later in the list.
• Soothing and barrier support: panthenol, ceramide NP, cholesterol, plant sterols, beta-glucan, and several centella asiatica forms (asiaticoside, madecassoside, madecassic acid and asiatic acid).
• Hydration: sodium hyaluronate and PCA.
• Stabilizers: tocopherol and tocopheryl acetate. Retinal is light- and air-sensitive, which is why opaque packaging is a plus.
• Fragrance: none listed in the version we checked.

Why retinal rather than retinol?

The skin converts retinol into retinal and then into retinoic acid, the active form. Retinal is one conversion step away, which is why some brands describe it as a more direct option. That does not automatically make it better for you. Strength, formula and your own tolerance matter more than the name.

MEDITHERAPY Reviews: What Users and Reviewers Say

We did not use the serum ourselves. This summary draws on independent write-ups and user feedback pages. Several are affiliate or partnership content, so we weigh them with caution.

• Gentleness: multiple reviewers report little irritation, even on sensitive skin. This is anecdotal.
• Texture: described as a light, water-like gel that absorbs quickly without stickiness.
• Value: the large 150 ml bottle is the main selling point, and it can be used on the face and body.
• Timeline: reviewers report smoother texture within four to six weeks, which is typical for retinoids.
• Dry skin: some suggest pairing it with a richer cream.
• Open wounds: one tester reported stinging when applied to freshly extracted or open skin, which is a general reason to avoid retinoids on broken skin.

Remember that individual results vary, and “no irritation” in one person’s experience is not a guarantee for yours.

Texture, Scent, and Application

The serum pours freely as a light, translucent gel with minimal viscosity. Use enough for a thin layer over the face and neck; the pump dose is not published, so start small. Absorption is fast, leaving skin feeling hydrated but not greasy — a niacinamide effect K-beauty enthusiasts will recognize.

There is no added fragrance. The slight characteristic scent of the active ingredients dissipates within minutes of application. Packaging is opaque to protect retinal from photodegradation.

How to Use MEDITHERAPY Retinal Skin Booster

Application Steps

1. Double cleanse (evening use recommended, especially when starting)
2. Apply pH-adjusting toner if preferred
3. Dispense a small amount and press gently into face and neck
4. Wait 60 seconds for absorption
5. Follow with moisturizer or sleeping mask
6. Apply SPF 30+ the next morning

Build Tolerance Gradually

1. Weeks 1-2: Every other night
2. Weeks 3-4: Five nights per week
3. Week 5+: Nightly as tolerated

What Timeline to Expect From Retinoids

The timeline below is general guidance for retinal products, not measured results for this specific serum. Individual results vary.

Possible Side Effects and Who Should Skip It

All retinoids, including gentle ones, can cause side effects. This is general information, not medical advice.

Common effects while skin adjusts

• Dryness, flaking or tightness
• Mild redness or stinging after application
• Increased sun sensitivity
• Temporary rough texture

Stop and seek advice if you notice

• Persistent burning, swelling or blistering
• Hives or rash that spreads beyond the application area
• Skin that does not recover after a week of pausing the product

Who should skip or ask a professional first

• Pregnant, trying to conceive or breastfeeding: topical retinoids are generally avoided. Ask your healthcare provider.
• Eczema, rosacea, perioral dermatitis or active inflamed acne: talk to a dermatologist before using a retinoid.
• Recently exfoliated, sunburned or waxed skin: wait until the skin has healed.
• Darker skin tones: irritation can leave dark marks, so patch-test and go slowly.
• Anyone on prescription retinoids or isotretinoin: ask your prescriber before adding a cosmetic retinoid.

Patch-testing steps

1. Apply a small amount behind the ear or on the inner forearm.
2. Wait 24 to 48 hours and watch for redness, itching or swelling.
3. If clear, try a small amount on one part of the face for several nights before using it everywhere.

Is MEDITHERAPY Retinal Good for Beginners?

Some sources say it suits experienced retinoid users. Other reviewers describe it as friendly for beginners because of its low-feeling texture. Both can be true: the formula is described as gentle, but the safest approach is still to treat it as your first retinoid step: slow frequency, sunscreen, and patience. If you have very reactive skin, a dermatologist can recommend where to start.

Who Is This Serum Best For?

• Retinal converts who want to commit long-term and value large formats
• Brightening seekers — the niacinamide pairing makes this a reasonable pick for uneven tone and dull skin
• Normal to oily skin types — lightweight texture suits this profile
• Budget-conscious anti-aging users — cost per ml is typically lower than small bottles
• Experienced retinoid users ready to move beyond small bottles

A Sample 8-Week Schedule for Starting MEDITHERAPY Retinal

This is a general starter plan, not a medical prescription. Adjust it to how your skin feels, and pause if you have burning, swelling or lasting redness.

Many retinoid users find that a slower ramp-up is more comfortable than starting nightly. Some people never need to go beyond a few nights a week.

Using the 150 ml Bottle on Neck, Chest and Hands

One reason this serum appeals to people is that the maker positions it for face and body. If you extend it beyond the face:

• Start with the neck, which is thinner and more sensitive than the cheeks, using fewer nights per week.
• Skip broken, sunburned or freshly shaved skin.
• Apply sunscreen to the chest and hands in the morning, since these areas get a lot of sun.
• Keep it away from the eyes, lips and nostrils.
• Wash hands after use unless you are treating them on purpose.

Does the Large Bottle Make Financial Sense?

Large bottles lower the cost per milliliter, which is the main appeal. But a large bottle is only a bargain if you finish it before it ages. A 15 ml or 30 ml retinoid can be used up in a few months, while a 150 ml bottle will take much longer for face-only use. If you plan to use it on face and body, it makes more sense. If you are unsure whether you tolerate retinal, a smaller bottle first is a less risky way to test. Keep the bottle in a cool, dark place, close the cap after each use and check the open-jar symbol on the packaging.

Retinal Myths Worth Dropping

• Myth: Peeling means it is working. Reality: flaking is irritation. A good routine aims for minimal peeling.
• Myth: More product means faster results. Reality: more usually means more irritation.
• Myth: You cannot use a retinoid in summer. Reality: you can, with daily sunscreen and sun-smart habits.
• Myth: Gentle means ineffective. Reality: consistent use of a well-tolerated product often beats an aggressive product used sporadically.

Pros and Cons

MEDITHERAPY Retinal Serum Alternatives by Strength and Format

Retinoid products differ in form (retinal, retinol, bakuchiol), strength and size. These four alternatives from different brands give you a gentler, a stronger and a drugstore option. Specs are from maker pages, retailer listings and ingredient databases.

celimax The Vita A Retinal Shot Tightening Booster: Best for Targeted Retinal Care

celimax The Vita A Retinal Shot Tightening Booster (0.51 fl.oz)

Included for 'MEDITHERAPY Retinal Skin Booster Serum 150ml Review' as a representative home product in this roundup; selection reflects the product set returned for this topic.

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• Size: 15 ml (0.5 fl oz) · Retinal 0.1% · niacinamide · 1% panthenol · Matrixyl 3000 peptides (palmitoyl tripeptide-1 and palmitoyl tetrapeptide-7)
• Retinal is liposomized, per retailer descriptions
• Retailers advise alternate-night use for newcomers and caution against layering with AHA, BHA or vitamin C

Pros: clearly stated retinal percentage; peptide support; compact size. Cons: small bottle means higher cost per ml; 0.1% retinal is a more serious retinoid step, so irritation is more likely.

Skip it if you want a large bottle for face and body or you are new to retinoids.

Dr.Althea 0.1% Gentle Retinol Serum: Best for Retinol Beginners

Dr.Althea 0.1% Gentle Retinol Serum, 1.01 Fl Oz, Korean Vegan Skin Care

Included for 'MEDITHERAPY Retinal Skin Booster Serum 150ml Review' as a representative home product in this roundup; selection reflects the product set returned for this topic.

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• Size: 30 ml (1.01 fl oz) · Retinol 0.1% (1,000 ppm) · bakuchiol · panthenol · allantoin · soybean oil
• No added fragrance listed, but includes lavender and other flower extracts
• Combines retinol with bakuchiol to help minimize irritation, per the retailer description

Pros: low, clearly stated strength; soothing ingredients. Cons: botanical extracts may bother very sensitive skin; retinol needs conversion steps to reach its active form.

Skip it if you react to botanicals or fragrance-like extracts.

DERMA FACTORY Retinal Night Cream: Best for Dry Skin That Wants a Cream

DERMA FACTORY Retinal Night Cream with Centella & Panthenol, 1.01 fl oz

Included for 'MEDITHERAPY Retinal Skin Booster Serum 150ml Review' as a representative home product in this roundup; selection reflects the product set returned for this topic.

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• Size: 30 ml (1.01 fl oz) · Retinal (listed at 1,000 ppm on the maker’s site) · centella leaf water · niacinamide · panthenol
• Cream format with macadamia oil and ceramide-supporting ingredients such as plant sterols and cholesterol
• The formula has changed over time, with older versions listing different ingredients; check your box

Pros: moisturizing; combines retinal with calming ingredients. Cons: includes fragrance in current ingredient lists; versions differ.

Skip it if you are fragrance-sensitive or want a lightweight serum.

CeraVe Resurfacing Retinol Serum: Best Fragrance-Free Drugstore Option

CeraVe Resurfacing Retinol Face Serum with Niacinamide, Pore Minimizer, 1oz

Included for 'MEDITHERAPY Retinal Skin Booster Serum 150ml Review' as a representative home product in this roundup; selection reflects the product set returned for this topic.

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• Size: 1 fl oz (30 ml) · encapsulated retinol · niacinamide · ceramides NP, AP and EOP · licorice root extract
• Fragrance-free and non-comedogenic, according to the brand
• Includes phenoxyethanol and a small amount of alcohol in the INCI list

Pros: widely sold; barrier-supporting ceramides; fragrance-free. Cons: not a Korean formula; small bottle; silicone-heavy base.

Skip it if you want a K-beauty retinal or a large bottle.

Which Retinoid Serum Fits Your Situation?

• You want a gentle, big-bottle retinal for face and body: MEDITHERAPY Retinal Skin Booster Serum.
• You want a clearly labeled 0.1% retinal: celimax The Vita A Retinal Shot Tightening Booster.
• You are brand new to retinoids: Dr.Althea 0.1% Gentle Retinol Serum, after patch-testing.
• You prefer a cream: DERMA FACTORY Retinal Night Cream.
• You want fragrance-free, easy to find and affordable: CeraVe Resurfacing Retinol Serum.

MEDITHERAPY vs. Competitors

How to Layer MEDITHERAPY Retinal With Toner, Serums, Moisturizer and Sunscreen

Some people ask how to apply MEDITHERAPY retinal alongside a long list of products such as a CoQ10 toner, a hydrating rose-water toner, a collagen serum or an argireline serum. A general rule helps: apply thinner, water-based products first and thicker ones last, and use only one strong active at a time.

1. Cleanse and pat dry. Wait until skin is fully dry before applying a retinoid, since damp skin can increase irritation for some people.
2. Hydrating toner or essence (for example, a CoQ10 toner or a rose-water toner): fine to use before the serum.
3. MEDITHERAPY Retinal Skin Booster Serum: a thin, even layer on face and neck. Follow the maker’s directions for the amount.
4. Peptide or collagen serums: can go after, on non-retinoid nights, or in the morning instead.
5. Moisturizer or sleeping cream to seal.
6. Morning: sunscreen, SPF 30 or higher. Setting powders with SPF do not replace a full layer of sunscreen.

What to avoid combining on the same night

• Other retinoids such as retinol, retinal creams and prescription tretinoin.
• Strong exfoliating acids (AHA, BHA) and scrubs.
• High-strength vitamin C if it makes your skin sting. Many people use vitamin C in the morning and retinal at night.
• Benzoyl peroxide, unless a dermatologist advises it.

How often should I use it?

Dermatologist-style guidance for starting a retinoid is to begin with once or twice a week at night, move to every other night as your skin adjusts, then consider nightly use. Some reviewers used the serum nightly from day one without issues, but that does not mean you should. If you are new to retinoids, start slowly.

How does the 150 ml size change things?

A big bottle is useful for body areas such as the neck, chest and backs of hands. It also means you open the product once and use it over many months. Keep the cap closed, store it away from heat and light, and watch for changes in smell, color or texture. Most skincare has an open-jar period of 12 months or so; check your packaging.

How We Chose These Alternatives

This is a research-based comparison, not a trial. We chose widely listed retinoid products from different brands and forms (retinal serum, retinol serum, retinal cream, drugstore retinol). For each, we checked maker pages, retailer listings and ingredient databases for size, retinoid type and key ingredients. We left out anything we could not verify and noted when ingredient lists differ between versions. Nothing here is medical advice.

Retinal vs. Retinol: A Quick Buying Guide With Thresholds

• First-time user: look for retinol or retinal at about 0.1% or lower, used a few nights a week, and consider a formula with soothing ingredients such as panthenol or centella.
• Experienced user: higher strengths are available, but irritation also rises. Increase gradually.
• Size: small bottles (15 to 30 ml) suit trial use. A 150 ml bottle makes sense only if you are confident you will keep using it for months and plan to use it on the body too.
• Packaging: opaque, airless or tightly capped packaging protects the retinoid from light and air.
• Fragrance: if you react easily, confirm on the INCI list.
• Open-jar period: check the symbol on the box and discard when it expires.

More MEDITHERAPY Retinal Questions

Is the MEDITHERAPY Retinal Skin Booster Serum worth it?

Yes, if you want a gentle-feeling retinal in a large size at a budget price. It is not worth it if you want a clearly stated high-strength retinoid, because the percentage is not prominently published.

Can I use MEDITHERAPY retinal on my body?

The maker markets it for face and body. Patch-test first, avoid sensitive areas, and apply sunscreen to treated skin that will be exposed to sun.

Can I use MEDITHERAPY retinal with vitamin C?

Many people use vitamin C in the morning and retinal at night. If you want to use both in one routine and notice stinging, separate them or ask a dermatologist.

Is MEDITHERAPY retinal different from retinol?

Yes. Retinal (retinaldehyde) is one step from retinoic acid, while retinol takes an additional conversion step. Neither is automatically better, and tolerance depends on strength and formula.

Where can I find real MEDITHERAPY retinal reviews?

Look for independent ingredient breakdowns and user feedback on Korean beauty platforms. Be careful with partnership or affiliate content, and treat any single person’s experience as anecdotal.

Retinal vs. Retinol vs. Bakuchiol: Quick Comparison

Routine Examples for Different Skin Types

Oily or combination skin

Cleanse, apply a light hydrating toner, use the MEDITHERAPY Retinal Skin Booster Serum, then a gel-cream moisturizer. Keep sunscreen light and non-greasy in the morning.

Dry skin

Add a hydrating essence before the serum and a richer ceramide cream afterward. Reduce frequency if skin feels tight or flaky.

Sensitive or reactive skin

Patch-test, use once or twice a week, and consider the “sandwich” method (moisturizer, serum, moisturizer) after checking with a dermatologist. Stop if burning continues.

Acne-prone skin

Keep the routine simple and avoid layering with other strong actives. A dermatologist can recommend whether a cosmetic retinal fits alongside any acne treatment you use.

Frequently Asked Questions

Is 150ml too much product before it expires?

Check the period-after-opening symbol on the packaging and use the bottle within that window; a 150ml bottle can last several months of regular use. Store in a cool, dark location to preserve retinal stability.

Can I use this in the morning?

Evening use is strongly recommended. Retinal increases photosensitivity, and UV exposure immediately after application reduces efficacy. If morning use is unavoidable, apply SPF 50+ immediately after.

Will this help with post-acne dark spots?

It may help with the look of post-acne dark marks, since retinoids speed up cell turnover and niacinamide is a well-studied brightening ingredient, but results vary and need consistent use. See a dermatologist for stubborn marks.

Is MEDITHERAPY a reputable brand?

MEDITHERAPY is a South Korean skincare brand. Check the maker’s own site and the product label for manufacturing and quality details.

Does niacinamide reduce retinal effectiveness?

Early concerns about niacinamide converting to niacin and causing flushing have been largely debunked at normal skincare concentrations. The current cosmetic chemistry consensus is that niacinamide and retinoids are well-compatible and synergistic.

The Verdict

MEDITHERAPY Retinal Skin Booster Serum is a large-format retinal serum for committed retinal users. The 150ml format lowers the cost per ml compared with small bottles. The retinal-niacinamide pairing targets brightening and anti-aging together. If you have decided retinal is for you, this is the product to make that commitment with.