Using Airyscan we can obtain high resolution images. This allows us to image individual fibrils, the smallest element we can visualise using this method (Fig. SI.2). We observe large bundles of protein, surrounded by water and polysaccharides in small quantities. The larger masses are all aligned with the flow direction. In the insert we can see small individual features, as marked with magenta lines, aligned with the flow direction rightward. From the insert we can observe a fibrillar size of 0.21μm. The mean WOP of this image is 0.48 ± 0.39 and the characteristic size is 1.68μm when using a window size of 300 pixels and a neighbourhood size of 3.