What your shaker can tell you about what’s happening inside your body...
Try this: After your next Protein & Fibre shake, don’t rinse your shaker immediately. When you’re washing up, fill it with hot water, give it a swirl, and watch the water as you tip it out.
It turns lime green. Every time. Every flavour.
It looks like a magic trick, but it’s actually simple chemistry. Once you understand what’s causing it, you’ll never think about protein powder quite the same way again.
What you’re actually seeing
Sunflower kernels are naturally rich in fat-soluble polyphenols—beneficial plant compounds that are bound up in the kernel’s natural fat content. Under normal conditions, they stay locked to the fat. But introduce heat, and the fat warms, loosens, and releases the polyphenols into the water. The lime green colour is what those compounds look like once they are free.
Now here’s the interesting part
Your gut is warm—consistently around 37°C. When you drink a Protein & Fibre shake, the same process you see in your shaker begins to happen inside your body. Your digestive warmth gradually mobilises the polyphenols from the sunflower kernels, releasing them steadily as the food matrix moves through your system.
This is what digesting real food actually looks like: not a rapid "dump" of isolated protein, but a gradual, steady release of protein, fibre, healthy fats, and beneficial plant compounds—each one unlocking in sequence.
Why you won’t see this with most protein powders
Rinse a shaker after a standard whey or pea isolate shake. The water runs clear. That is because the processing that creates an "isolate" strips away the natural food matrix, leaving behind a concentrated protein fraction and not much else.
The clear rinse is the signature of an empty calorie. The green rinse is the signature of a whole food.