Is weider prime that supports testosterone safe for younger women to take?

No: I wouldn't recommend any over-the-counter products of that sort. Can be dangerous, and there is no evidence of its benefits. You might see short-term benefits if you are a power lifter or body builder, but the risks aren't worth it. If your interest is in powerlifting or bodybuilding, you might consider http://nanbf.org/ (North American Natural Bodybuilding Federation). Hope that helps.