1 Leaf shutters are usually fitted within a lens assembly (central shutter), or more rarely immediately behind (behind-the-lens shutter) or, even more rarely, in front of a lens, and shut off the beam of light where it is narrow. 2  Focal-plane shutters are mounted near the focal plane and move to uncover the film or sensor.
DHEA levels begin to naturally decline by the age of 30. While normal levels for women in their 20s fall between 65 and 380 Âµg/dL, for women in their 30s and 40s, the average normal range is 45 to 270 and 32 to 240 Âµg/dL, respectively.
It is those people (like my cousin) who take mass loaded DHEA supplements for the gym (800mg instead of 10mg) that end up with problems. I am currently at about 135 DHEA on a scale of 100 to 800. So I will supplement with 5mg daily for a couple weeks then retest to see if I am at my target, which will be about 400-500.