It is worth noting, however, that such research has been going on for decades. Yet, it seems that use of such products has been very limited, or even nonexistent, in most lands. Some typical reports help to show why: “ Blood is a source of nutritional and functional proteins.
फिर भी, यह प्रतीत होता है कि ज़्यादातर देशों में ऐसे उत्पादनों को सीमित रूप में, या बिलकुल ही इस्तेमाल नहीं किया गया है ।