You have to be careful with a lot of the body building hype studies. Or their products claiming to do all sorts of wonderful things to one's body. An example would be C-Q10 which may be helpful for one with a bad heart. Some of those studies were done on little ounce weight mice. When translated out to the weight of a Human. One would have to take up to 400 mg. to 500 mg twice a day to be of any help. What that amount will cost wholesale or retail is very expensive.

Dogs being smaller in weight than humans may respond better to the dosages recommended for a human. I worked with a herbalist for 8 years who used two very good companies called Nature's Sunshine and the Now company. This Herbalist got to go to China and see how they dispense Herbal formulas for various ailments. The patient after a exam is given much greater amounts of the raw blended herbs. Sometimes in the pound weight size or much more. Not like the 30/60/90 day capsule formula's given in the USA.

As a former body builder in my younger days. Creatine/L-glutamine/ L-arginine/Whey and Yellow Pea Protein/Desiccated liver/Brewer's yeast/real Black Strap molasses has stood the test of time.

Have not gotten Jack's book on raising-breeding/caring/and conditioning idea's on dogs yet. So this may get me more up to date. I could see the benefits of creatine/l-glutamine used on rest days to help recovery and hydrate the muscles. But too much creatine used daily can shut down the body's natural creatine making process. Can cause the muscles to take on too much water in the cells. Once the creatine is stopped the extra water weight leaves the cells and the bigger looking muscle returns to it's lesser former size.

Giving to much of anything to a working human or dog will not improve the results being desired. Just puts extra work on the kidneys and liver etc. To much of a good thing can be just as bad as not enough. Finding that fine balance is the trick. Cheers