Is there a vegan collagen?
Not as such - collagen is an animal protein. Products sold as vegan collagen are blends of vitamin C, amino acids and botanicals intended to support the body's own production.
Marine or bovine - which is better?
Both are widely used. Marine has a smaller peptide size and suits anyone avoiding beef; bovine usually costs less. Neither suits vegetarians.
How long before I see anything?
Manufacturers generally suggest eight to twelve weeks of daily use. It is cumulative and slow rather than something you notice quickly.
Does it dissolve in hot drinks?
Unflavoured peptide powders dissolve clear in hot or cold. They will not thicken or gel the way gelatine does.