Alter blood values? Please attach some evidence/study...
Here an interesting study about whey safety:
https://jissn.biomedcentral.com/articles/10.1186/1550-2783-4-8
Anyway whey protein powders are just food supplements. It's not always possible to eat regular food so they are a convenient way to reach macronutrient quota. First set a balanced diet and then supplement as required. If you prefer, you can find unflavored and unsweetened whey. Some brands also offers naturally sweetened (stevia) and naturally flavored powders.
At the end, I will be definitely more concerned about junk food, food contamination (see recent eggs alert in Europe) or ionizing radiation when flying...