I'm 27y. my tesyosterone level (470 _540) ,is it normal level for young male? i have ed, low libido,less muscle. should i take trt ?

No: You are likely to get different answers from different doctors. Here is my answer: Your levels are technically within range. Low testosterone is unlikely to contribute to the problems that you describe. Replacing testoerone is unlikely to help, and carries risks. You need an assessment for other causes and treatments, which might include psychological.