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L4B Quantum Glow Liquid Radiance Droplets


What is the L4B?

moss founder Celestyna created the L4B as a place to fulfill her curiosity and creativity. New ingredients, formulations, and techniques are tested, including ultra powerful and specific products Celestyna creates for her seasonal needs. Some of these exceptional creations we make available for you as couture experimental skincare – extremely limited quantity and always expertly hand-crafted by the proprietress herself.

At the end of the year we consult all of our L4B participants and consider adding a favorite L4B formulation to the permanent moss collection.

Please note, due to the foundational concept of the lab, each batch will vary slightly – it may have slightly different ingredients and different percentages of ingredients. The L4B is NOT a conventional, static skincare line – it is a formulator’s playground.



5.00 out of 5

The concept:

A true quantum radiance blast. Out of this world concentrations of proven all-star ingredients. Equally beneficial and powerful for both acne and aging concerns.

Try bakuchiol – the plant-based retinol dupe that creates the exact same skin renewal that makes retinol the ingredient millions reach for when addressing acne or fine lines but without the irritation or safety concerns of retinol. Most, if not all skincare, includes bakuchiol at 1% – we have boosted it to 5% in this ultra concentrated formula for next-day results.

Tetrahecyldecyl Ascorbate is a stable, very powerful form of Vitamin C. Here are some statistics illustrating how multi-correctional and beneficial it can be:

  • At 0.1% reduces melanin synthesis by 80%
  • At 10% eliminated age spots in 16 weeks
  • At 0.1% increases collagen by 50%
  • Acne clearing at 10% with 80% patient satisfaction
  • Increases collagen synthesis 2-3x better than ascorbic acid
  • Inhibits inflammatory proteins MMP-2 and MMP-9 better than ascorbic acid

We’ve included this uber-ingredient at a whopping 15%.

Lastly, bisabolol is included at 0.5% for it’s anti-inflammatory and anti-bacterial properties.

What makes this so exquisite however, is the gorgeous base of oils these star ingredients are coddled in.

Rare unrefined honeydew melon oil (similar to cucumber, watermelon and Kalahari melon oils) and unrefined blackberry oils (similar to raspberry oil).

Has a very faint beautiful natural scent that is completely essential oil free and is simply due to the fact that these oils are ultra pure and unrefined. 

Last but not least, we include an absorption enhancer to ensure these powerful ingredients are getting delivered to the skin to work their magic.



Size: 15ml


Muskmelon oil, Blackberry oil, Grapeseed oil, Tetrahecyldecyl ascorbate, Bakuchiol, Ethylhexyl Olivate, Dimethyl Isosorbide, Bisabolol, Rosemary antioxidant


Add 1-3 drops and cocktail to boost any serum, moisturizer or facial oil.


Use as a powerful concentrated overnight treatment. Use 3-6 drops and massage and pat into skin until fully absorbed.

  1. 5 out of 5

    (verified owner)

    This is really a special product. I’ve only been using it for a little over a week, so I can’t speak to long-term results, but I’ve LOVED this addition to my skincare. What I’ve loved: plays well with others – I mix a few drops in AM w/either my Vitamin C Oil or other oil and it gives more luminosity to my skin. In the evening I might go a bit more intense w/3-4 drops on it’s own, after my treatment, before my other oils/balms. The scent is heavenly! To me, it smells like a softened, but potent, honeydew melon – super fruity, but powdery. Here’s the thing. I don’t want a product that claims “I’m all you need”. I’m too much of a green/clean skincare junkie, no-makeup wearing hippie…This product is something that, to me, reads “I’ll make everything you use BETTER, make your skin BRIGHTER, and I’ll be that missing component you never knew you needed but now can’t live without”. So there. It’s brilliant. I won’t be without it. Xoxo

  2. 5 out of 5

    (verified owner)

    Well I just started using it, and I’ve already ordered another…so I gotta hope this will become part of the permanent lineup!

  3. 5 out of 5

    (verified owner)

    I do not usually write reviews, but Quantum is deserving of one. I have not used it long, but I can say, I love the scent – an aroma of pure oils. I initially thought it might be too oily, but my skin absorbs it easily with no greasy after feel. Yes, it is pricey, but usually that is determined by the quality of the ingredients. I would not object to it becoming a permanent addition. For informational purposes, let me just add that I am not a young person. I had cystic acne when I was a teenager and into young adulthood and even in my 30’s. Because of this, I am a skincare geek, so to speak. I have tried just about everything! I still explore, but MOSS has become my “go-to” for skincare. There has not been one product that I have not liked and used.

  4. 5 out of 5

    (verified owner)

    I think I have finally found my Holy Grail face oil!! I loved Lumi before it was discontinued, and sadly the new L4b version didn’t feel the same. I was left searching for another EO-free oil for daily use. I think Quantum fits the bill!! I have only been using it for 1 week so I can’t attest to any huge results yet, but the texture and scent are heavenly. It absorbs quickly and mixes so well with the Halo powder. Yes, it is pricey, but a great way to get lots of actives in one great product. Please make this a permanent addition to your product line-up!!

  5. 5 out of 5

    (verified owner)

    Quantum Glow is Exquisite!

    I love love love this product. It makes my skin glow, it’s super effective – my skin really loves it, and it has a wonderfully delicate smell that makes me smile. There is something about it that’s just divine.

    Please, please make this a permanent part of your amazing products.

  6. 5 out of 5

    (verified owner)

    This product is what my skincare routine was missing! It smells amazing, but the scent is difficult to describe. It’s sweet, fresh and just lovely. I have been adding one drop to Soirée in the morning and my skin is brighter, produces less oil and has the glow that I’ve been missing. I also love that I can use it in the AM (with SPF!!) because I wasn’t sure where it would fit in my nighttime alternation between Il and ABC. Yes, this product is pricy, but the ingredients are top notch and by using one drop a day, I expect it to last a long time.

  7. 5 out of 5

    (verified owner)

    Looooooooove!!!! Yes, this feels and smells so nice but it works and works fast! I used this in combination with zen physique on some deep stubborn acne and holy smokes! The addition of quantum to zen works like magic! I had red raised bumps not only flatten but actually disappear (on surface and below) in 3 days! This is not normal for me, spots like that stick around for ages and normally I have a mark/redness at the scene of the crime for months! In addition to tackling cystic acne, quantum added a smoothness to my skin that I can see/feel. This is my new favorite product from the moss lab!

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moss uses a library of over 50 active ingredients to banish acne and create radiant skin. 

Our skincare uses higher active ingredient percentages and more active ingredients per product compared to others, meaning we outperform even prescription skincare.

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