I thought the OP meant "stud dog supplements", like some mix of zinc, vitamins and amino-acids etc. Those will do nothing except lighten your wallet, as UR20Z already explained.
As for the thought of drug/hormone replacement therapy just to get your dog to perform, that one unfortunately does come up a lot, it showcases some problematic morals or ethics and I think previous posts have nailed that.
To be clear, that patent isn't for a product, what he's patenting is "a method of treating an animal [...]", specifically in the context of "for treating osteoarthritis (also known as degenerative joint disease), intervertebral disc disease, hip dysplasia, weakness due to old age, muscle atrophy and joint pain". This distinction is important, because a patent like that would allow the patent holder to sell seminars and certifications in their "patented method". The patent office doesn't assure the therapy is valid or safe.
And in fact, in the many years this product has been floating around, I can't find anything published by this guy at all, let alone any evidence to support this as valid, safe and effective medical therapy for what he's claiming. All he seems to have is testimonials. Right on the main page of his website, he's got the mention "This treatment is not intended to diagnose, treat, cure or prevent any disease". And sure enough, 1450$ US for 1.25h seminar, plus recurring renewal fees to keep your "certification" and use the trademarked names in your advertisements. I'm guessing that's why you'll find only a dozen vets registered on his website.
Because some people have access to testosterone products through non-medical channels, I think one of those "don't try this at home" disclaimers is warranted. If you think this type of therapy will be beneficial to your pet, talk to your vet, if they haven't convinced you otherwise feel free to talk to one of the handful of registered ones from the website.