Yes I do feel an increase in energy and metabolism with eating raw glands. I usually ration the glands and will eat small portions throughout the first week after butchering an animal. Eating pieces of thyroid, pancreas, liver, kidney, adrenals, lymph nodes, spleen, etc. works synergistically to promote overall health.
A potent blend that gets my juices flowing after a fresh kill is a combination of thyroid, pancreases, liver, with a shot of raw bile...it creates an instant increase in metabolism and digestion.
Its unfortunate we live in a world where there is little interest by the scientific establishment to investigate the potential healing properties of raw organs and glands.
The only warning I give people is to make absolutely sure the animals are as pure and healthy as you can possibly source. There is a lot of sickly poor quality grass fed swill being sold on the market, and I cant vouch for anything I haven't killed with my own two hands and inspected with my own senses !