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.
Precautions: Folic acid especially in doses above 1.0 mg daily may obscure pernicious anemia (hematologic remission may occur while neurological manifestations remain progressive). Caution should be exercised to ensure that the prescribed dose of DHA does not exceed 1 gram (1,000 mg) per day.