Re: supplements taken orally
There are only 2 reasons to use an injection as opposed to pills etc
1. Where a person has some disease of the gut that prevents adsorbsion (pernicious anemia for example) Even in these cases, using high doses by mouth is often adequate
2 Where a person is so severely deficient that they are in immidiate danger, for example alcoholics who are risking brain damage from thiamine deficiency. They are generaly given a large in jection every day for a few days, then transfered to pills
For the average person wanting to supplement their diet, pills are totaly adequate.
The desire to take medicines is what seperates man from the lower animals - William Ostler
Multiple anecdotes do not equal evidence - Me