There are a few ways to get NSF-certified supplements for sports. The most common way is to find a supplement company that has been approved by NSF. You can also search for NSF-certified supplements through the internet. There are many websites that offer this service.
Another way to get NSF-certified supplements is to find a physical therapist or trainer who works with athletes and can recommend a reputable supplement company. There are many different opinions on which supplements are better for building muscle. Some people say that it depends on the person, how their body reacts to certain supplements, and what their goals are.
The best way to determine which supplements will work for you is by trying them out and seeing what works for your unique situation. What I have found is that when I am working on a muscle group, sometimes one supplement seems to be helping more than others do, but in the end, it's all about consistency and time spent in the gym working hard.
If your nutritionist hasn't been certified by the NSCA, it's important to evaluate which certifications he or she holds and what the credentials are for. Additionally, you might wish to ask about the qualifications of any person measuring your clients' food intake in order to assess their credibility.
There are a number of sports supplements that have been shown to be safe for athletes to use. These include sports drinks, protein powders, and creatine supplements. N-sport, a certification organization that evaluates the safety of sports supplements, has certified these products as being safe for athletes.