This thread is getting interesting. lol!

Please allow me say a few words about whey protein.

Raw whey is a by product of cheese making and was dumped into the drain before it was discovered as a superior source of protein.
The protein is isolated by various types of processing methods and each method yields different % of protein, amino acid profile and nutrition value.
As for bodybuilding, it doesn't make any difference if you are using A or B. But certain individuals would not be tolerance to certain types of processing method because different processing method yields different quality of whey proteins or components. Whey protein is composed of many components. Different people react differently to certain components in the whey protein.

I have been selling whey proteins since the mid 90s before I started importing my own stuffs in 2001. I can say that whey proteins produced superb results on people who have impaired or poor immune response. Different whey proteins produced different results for this case. There are specialized whey proteins which are processed specifically to meet certain specifications for specific purpose. They don't come cheap because of the hi tech machines that are designed for that purpose. These whey proteins do make a big difference in immune support. But as for bodybuilding, I don't think it will make any significant impact on muscles gain. I would go for the cheaper whey protein concentrate.

This is from my 14 years experience in selling and supplying various types of whey proteins for general health, nutrition therapy and lastly bodybuilding.

The isolate has more protein than concentrate. That's all. Isolate doesn't give you better results. Concentrate has better nutrition value while isolate has higher protein %.

You are right. Proteins are not created equal. They have different amino acid profile. Red meats are different from white meat. Whole egg have higher biological value than meats. We should eat different protein food to get the benefits from each source.

Whey protein is suitable for people of all ages, from very young to very old. All infant formulas (the moment the baby is born) are fortified with whey protein. Whey protein is not specifically produced for bodybuilders only. Whey protein is manufactured for use in infant formula, sports nutrition, general nutrition, animal nutrition, weight maintenance formula, medical use and etc. Just because bodybuilders drink tons of whey protein doesn't mean whey proteins are suitable for bodybuilders only.

I started giving my daughter whey protein at the age of 1 years +. She is 12 now and is still on whey protein every morning. My parents are also taking whey protein. There are a lot of old folks buying whey protein from me. It helps them to stay healthier by boosting up their immune system and provides them with more energy. It supplies them with amino acids, helping in tissue repair and recovery.

Whey protein is a natural food. It is a convenient source of protein where you can take it at any where and any time.

Whey protein can be heaty and phlegm forming. Symptoms of heatiness are constipation, ulcer in the mouth, sore throat and etc. Drink plenty of water or reduce the protein intake.

I am selling food ingredients. Brand is not important as long as you get the ingredients right.