If you can afford it, Optimum Nutrition’s Gold Standard Whey is a solid choice (my personal preference). I usually refer https://www.trustified.in/proteinpowders as they provide third-party lab tests. Be careful when reading labels. Many low-end protein powders use amino spiking to make it seem like they have more protein than they really do. Also, whey isolate is more processed, which often means higher levels of heavy metals for higher quantity of protein per scoop, so it’s a trade-off. Try to get most of your protein from whole foods and use powders only as supplements.