There are a lot of concerns being raised recently with whey protein supplements; there are valid reasons for concern. Whey is essentially isolated milk protein; cows are given antibiotics and hormones in modern farming practices. I don’t really think that’s a secret to most people, however, what may be elusive to people who are aware of this is that you actually don’t have to be concerned about whey- at least not from these factors. Whey is tested so that antibiotics are not present, and the growth hormones are in extremely low concentrations because they are transported by fat cells- and does not have an affinity to bind protein. Obviously you may be concerned about even low concentrations of hormones, however, the hormones present whey are structurally different from those in humans and essentially do not have an effect within the human body.
Are they safe? The answer is a little more convoluted, unfortunately. The final word is essentially that it is likely safe for most adults when used as recommended. However, there are many potential side effects that can be attributed to the use of whey protein.
Caution is advised for people with diabetes or low blood sugar levels because whey protein may alter blood sugar levels.
Caution is advised in people with bleeding disorders or in those taking blood thinners,, as whey protein may increase the risk of bleeding.
Whey protein may also interfere with the way the body processes certain drugs using a specific liver enzyme that is also responsible for metabolizing many toxins, including alcohol and acetaminophen.
Caution is advised in people with low blood pressure/hypotension, as whey may lower blood pressure.
Caution is advised for people with stomach or intestine disorders.
Avoid using whey protein long-term and in excessive amounts- 6 month duration is the suggested time period to use whey.
It is important to be aware of this when drinking, as someone who uses whey, especially extensively, may have a lower tolerance to alcohol- from a toxicity standpoint; less available enzyme for metabolizing alcohol.
Ultimately, it is up to the consumer to decide what is best for them and their families, but the bottom line is that there is no scientific evidence to suggest that it is dangerous to human health. Are there alternatives? Of course. Vegan protein sources have been formulated to meet the demands of even the most hard-training athlete by combining rice, pea, and cranberry protein isolates to deliver a 100% amino acid score.