Shutter Speed s. Many of today's SLR camera s offer action-stopping shutter speed s of 1/2000 sec. or faster. None of the point-and-shoot models come close, although some do offer speed s fast enough to stop most action.
According to the National Institute of Health, research suggests that taking between 20 to 50 milligrams of DHEA supplements daily should be sufficient and safe for most adults over the age of 30. Individual needs will vary, but less is usually better, especially at first.
So twice daily is every 12 hours, thrice daily is every 8 hours, four times is every 6 hours and so on and so forth. However for most medication one should not obsess to be precisely on the dot. you may take the medication even if you are off by say an hour or so.