Intervertebral disk – a structure that separates the vertebrae. It serves to absorb the movements of the vertebrae. Intervertebral disc consists of the so-called pulpal core special jelly mass and envelops the fibrous ring, which consists of fibers. Fibrous ring partially fixed to the adjacent vertebral bodies, and partially – to the adjacent intervertebral ligaments. Some parts of the ring are “free” and there may be some stretching of it. Excess load on the fibrous ring leads to the fact that the nucleus breaks pulpal core break fibrous ring at a greater or lesser extent. This leads to the formation of disk herniation .
Transdermal patches (adhesive patches placed on the skin) may also be used to deliver a steady dose through the skin and into the bloodstream. Testosterone-containing creams and gels that are applied daily to the skin are also available, but absorption is inefficient (roughly 10%, varying between individuals) and these treatments tend to be more expensive. Individuals who are especially physically active and/or bathe often may not be good candidates, since the medication can be washed off and may take up to six hours to be fully absorbed. There is also the risk that an intimate partner or child may come in contact with the application site and inadvertently dose himself or herself; children and women are highly sensitive to testosterone and can suffer unintended masculinization and health effects, even from small doses. Injection is the most common method used by individuals administering AAS for non-medical purposes. 
A 64 year old man recovering from tick borne viral meningitis, without any progress at attempts to gain strength, I began Rad-140 about three months ago, first with another supplier that offered 10 mg, for a month, and then this product at 20 mg daily, regularly except for a few weeks. I have progressed from lifting only twelve pounds to thirty-five with my left arm, bicep, tricep and shoulder, which were partially paralyzed before from the tick bite. I progressed from a thin barely alive 132 pounds up to around 150 pounds, and I now can work out with a 75 pound barbell that I couldn’t get off the floor before. I do believe I could have done much better though. I also tried using arachidonic acid, developed crippling inflammation in my fingers from it, and literally stopped working out and I intermittently skipped things till I figured out what was causing that, taking about three weeks off. Rad-140 did nothing to me that seemed negative. It was the arachidonic acid, I was probably misusing that and so stopped. My only difficulty with recovery lies in muscles getting stronger till I push my frail bones too hard and they hurt, especially in the forearms. The hype available says the sarm works on skeletal, tendons, cartilage, and muscle. My experience, please note at the age of 64 and after having been severely debilitated, is very good for muscles, tendons and cartilage, and bone too, and that in a few months after years of trying to get stronger again, but one can still strengthen muscles and stuff faster than the bones in the forearms can get strong, and so can find forearm pain limiting a workout. My body fat dropped from 13 to under 10%, my blood pressure and resting heartbeat dropped dramatically. My liver has noticeably shrunk, giving me a different look in the abs area. I can handle physical stress, like hard work, heat, or cold much better. As an old school outdoor athlete type, I also know how to eat and take a variety of vitamins and supplements, so this has been with good nutrition. If I didn’t eat well and drink good beer, just saying, it makes me lots hungrier.