Why our Ultimate Serum bottle isn't dual-chamber like TNS Essential Serum

TNS Essential Serum® by SkinMedica® Allergan® has a very fancy pump bottle that contains two different chambers. You dispense both sides at the same time, and are instructed to mix the two together on the back of your hand.

One side of the pump has a pH of 5, and the other just less than that, at about 4.5.

We're inclined to think that the dual pump of TNS Essential Serum is essentially a marketing gimmick. What's the point of keeping two halves of the product separate, only to mix them together?

Growth factors and certain peptides are rendered less effective at a pH of less than 5. Presumably that is why the TNS product is packaged that way, although we of course can't be for sure (the manufacturer doesn't mention why). When you mix the two parts of the product together, of course you also blend the two pH levels, and would presumably also negatively affect any sensitive growth factors once mixed.

That's why our Ultimate Serum has a pH of about 5.8. It's a low enough pH to create a good acid balance on your skin, but not too low to adversely affect the sensitive growth factors and peptides in contains. All in one nice, but non-fussy, bottle. That's one reason why we can offer our Ultimate Serum at such a fair price. Ounce-for-ounce, it's about 1/4th the price of Skinmedica's TNS Essential Serum even though it contains the top 23 ingredients of that very effective, yet very pricey, product.

Note from our legal eagles: RevivSerums Ultimate Serum is neither endorsed, nor sponsored by, nor affiliated with Allergan Inc.

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All about Vitamin C Serums, and why ours is best

Our Phloretin Serum kit with L-Ascorbic Acid is the gold standard for vitamin C topicals. Check out today's Beauty Brains Blog for details. Our kit produces a serum with up to 20% l-ascorbic acid, the strongest available. And its pH of 3.0 makes it very stable, so it lasts much longer than competitive serums which oxidize pretty rapidly. While that pH is low, it's in the "goldilocks" range -- not too low to be excessively irritating, but low enough to be properly effective. And you can customize the strength if you prefer a more gentle approach.

 

Here's why you need a Vitamin C Serum:

 

 

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Why "all-in-one" skin care products are a misnomer

Man applying skincare serum

Q. Why do we make so many different skincare serums? Why can't you put all the ingredients into one product? It's very confusing.

A. That's a great question. 


The answer lies in chemistry.

There are many ingredient incompatibilities, especially related to pH and to electrical charge (cationic/positive charge; anionic/negative charge).

Many ingredients like delicate proteins (growth factors, etc.) cannot stand a low pH, nor can many preservatives. Niacinamide can turn into nicotinic acid if the pH isn't in the right range. Copper and Vitamin C can theoretically cancel each other out. Certain ingredients need a lower pH to be effective.

Then there is the issue of volume and potency. Most ingredients require a certain volume to be considered "active." You can only add so many of these active ingredients before everything starts to get diluted, and thus ineffective.

 

The exceptions? Certain actives like peptides, growth factors and stem cells. Such ingredients are measured in micrograms -- a unit of mass equal to one millionth of a gram -- and little volume is required for such ingredients to be very effective. That's why, for example, we're able to "shove" the top 25 primary ingredients of TNS Essential Serum® into Reviv Serums' Ultimate Serum AND leapfrog that formula by also including hexapeptides and stem cells.

 

While we wish we could provide a product that contained a sunscreen, antioxidants, stem cells, hydrators, brighteners, tighteners, telomere-targeters, glycolic acid, retinoid, emollients, redness reducer, wrinkle filler, anti-inflammatory, copper, vitamin C, etc. -- all in one bottle. It's not practical or possible. Be skeptical of the efficacy of any product that portrays itself to do it all. There is really no such thing as an "all-in-one" skincare product.

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