Glycine inhibitory effects
http://raypeat.com/articles/articles/gelatin.shtml
Glycine's inhibitory effects appear to oppose estrogen's actions generally, in sensory and motor nerves, in regulating angiogenesis, and in modulating the cytokines and "chemokines" that are involved in so many inflammatory and degenerative diseases, especially tumor necrosis factor (TNF), nitric oxide (NO), and prostaglandins. Exposure to estrogen early in life can affect the health in adulthood, and so can an early deficiency of glycine. The degenerative diseases can begin in the earliest years of life, but because aging, like growth, is a developmental process, it's never too late to start the corrective process.
From the article “Gelatin, stress, longevity”. Ray Peat. 2009
http://raypeat.com/articles/articles/gelatin.shtml
The relief of pain and inflammation is likely to be almost immediate, resembling the anti-inflammatory effect of cortisol or aspirin.
A daily intake of 100 grams of gelatin wouldn't seem unreasonable, and some people find that quantities in that range help to decrease fatigue.
If a person eats a large serving of meat, it's probably helpful to have 5 or 10 grams of gelatin at approximately the same time, so that the amino acids enter the blood stream in balance.