I came across this wonderful talk by Swami Nirmalananda Giri on facebook( someone had shared it ). I was immediately drawn into the knowledge that he possessed and the kind of information that he shared. I googled for more information about him and came across some wonderful stuff that I am sharing below
Please note that, the talks are in Malayalam
You can meet the master at Shree Sankara Thapovanam, Pampadi, Thiruvilwamala, Near Ottappalam, Kerala
The part where he explains about taking food and examining, under a microscope after refrigerating it, I really want to try that out