Can whey protein or amino acids trigger male pattern baldness or cause hair loss?

Protein supplements do not trigger male pattern hair loss.  Your genetic trait or predisposition causes male pattern hair loss.

I recommend getting a formal evaluation with a hair loss expert. Some amino acids help slow down hair loss, L-arginine among them. There are great non-invasive options like PRP/progesterone and/or hair transplantation. See an expert. Best, Dr. Emer

Male pattern baldness is not caused by whey protein and amino acids. It is a combination of genetic and hormonal factors that causes the latter.

Whey is left over when milk is coagulated during the process of cheese production, and contains everything that is soluble from milk after the pH is dropped to 4.6 during the coagulation process. It is a 5% solution of lactose in water, with some minerals and lactalbumin.The fat is removed and then processed for human foods. Whey is very popular among weight-lifters. Danish researchers found that subjects taking a whey protein shake before and after workouts for 14 weeks increased muscle growth by more than 25 percent, while those consuming a carbohydrate-based drink saw no change in muscle mass. (Suckers.). Weight-lifters have long wondered if they have more hair loss than non-weight-lifters. As androgenetic alopecia affects about 50% of the male population, there is no evidence that weight-lifting (or whey) has any impact.  

  
There is not evidence to prove any
such problems with those products.  Please consult with a hair transplant specialist to evaluate your hair.

When you use whey protein or amino acids they sometimes have steroid type compounds in them and if they do, this will trigger hair loss. You need an examination by an expert to find out the cause of your hair loss