Eating soy instead of meat products is in many ways more sustainable for our planet. Still, soy is far from perfect.
One major criticism of soya is that it has to be imported into Germany from far away. Whether by ship or by plane, long distances cause extremely high CO2 emissions and thus a high carbon foodprint of the product...
The sweet lupine, on the other hand, grows practically on our own doorstep:
The plants can also be used as green manure and contribute to the regeneration of arable soils. Lupines can thus reduce the use of synthetic fertilizers.
sweet lupines contain up to 40% protein, very little fat - which is rich in mono- and polyunsaturated fatty acids - all essential amino acids, vitamin E, potassium, calcium, iron and magnesium. In addition, the lupine's fibre content is very high, which promotes digestion.