The values of T 1 and T 1⇢ that were observed for pure BSA are approximately a factor of 3 and 2 smaller respectively when compared to those measured for samples of F2 and F4. An increase of relaxation time in proteins is linked to the decrease of the rotational correlation time ⌧ C , the time that the molecule needs to rotate by one radian. In the current system this indicates that the formulation contains larger average domain sizes (of lower overall mobility) due to an aggregation of the protein with the sugars. Such behaviour is in line with previous reports describing the stabilisation of proteins by sugars .