i hate to ask, but..

[GearHeaded]

EQ Dosing for horses is 0.13-0.50mg/lb - One of the largest breeds of horses is a Percheron which has an average weight of 1900 lbs. That means a horse, at 8x the weight of a 250 lb monster gym rat is only going to be taking 700mg of EQ per 10-14 days and put , and likely gain 75-100lbs.

so by your math, a 1900 pound horse can put on about 4% his body weight in mass by taking EQ (which to you seems like a big deal and that EQ is great for mass for horses but not humans).. but a man can't put on 4% his body weight in mass by taking EQ.
how much do you weigh ? lets just say 180 pounds .. so you don't think EQ can help you put on only 7 pounds (ie, thats 4% just like the horse)

1900 pound horse takes eq and gains 75 pounds like you said ,,, thats 4% mass increase
180 pound man takes eq and gains 7 pounds ... thats a 4% mass increase

hmm.. seems very reasonable to me. so not sure why you say horses respond to EQ but humans don't