Breakdown of Сыворотка с этой кислотой хорошо увлажняет кожу.
этот
this [f: эта, n: это]
хорошо
well
с
with (also со)
кожа
skin
Questions & Answers about Сыворотка с этой кислотой хорошо увлажняет кожу.
Could we use the advanced preposition наряду с instead of just с here?
Not in this exact structure. The phrase с этой кислотой simply describes an ingredient inside the serum. The phrase наряду с means 'alongside' or 'on a par with' and is used to equate two separate things. You would use it to say 'Along with this acid, the serum contains vitamins' (Наряду с этой кислотой, сыворотка содержит витамины).
Why do we use с этой кислотой (with this acid) instead of из этой кислоты (from/of this acid)?
In Russian, с + Instrumental is used for added ingredients, meaning the serum contains the acid as one of its components. If you used из + Genitive (из этой кислоты), it would imply the serum is entirely made out of this acid, which would probably be quite dangerous for your skin!
How does the verb увлажняет (moisturizes) connect to other Russian words for 'moisture'?
It is derived from the noun влага (moisture). When forming the verb увлажнять (to add moisture to), the consonant г mutates into ж. This г to ж shift is a very common spelling rule to watch out for in Russian word building.
Is сыворотка exclusively a specialized beauty term?
It is used heavily in cosmetics for 'serum', but it is a general biological term too. It is the standard Russian word for blood serum in medicine, as well as 'whey' (the watery part of milk that remains after the formation of curds) in food contexts.