What is in the Silka serum
Five things. A short list is easier to check, easier to patch test, and easier to say something honest about.
The list
Deionized water as the base, glycerin, niacinamide, hyaluronic acid, and propylene glycol, which keeps the formula stable and spreading evenly.
Why no fragrance
Fragrance is the most common reason a person reacts to a product they otherwise like. Leaving it out costs nothing except the product smelling of nothing.
What a short list cannot do
It cannot do everything. This one is aimed at how skin looks and feels in terms of hydration and surface texture, and it is not pretending to be a treatment for anything else.