Not every collagen powder starts with the same raw material.
Two of the most common sources are bovine and marine collagen.
Neither needs to be declared universally “better”.
The more useful question is what the finished product has been designed to do.
Propel Health uses marine collagen peptides in its beauty booster supplements formula, then combines them with Vitamin C, Zinc, Silica and Hyaluronic Acid.
In fact, marine collagen accounts for 71% of Collagen Beauty Boost.
Propel Health also sells plain hydrolysed bovine collagen separately.
That separation makes sense.
If you simply want an unflavoured collagen protein, choose the straightforward collagen product.
If your specific goal is a beauty-focused formula, Collagen Beauty Boost adds ingredients selected around skin structure, collagen formation and hydration.
The best choice depends less on which animal appears on the ingredient list and more on what you actually want the product to do.