Testosterone can be administered parenterally , but it has more irregular prolonged absorption time and greater activity in muscle in enanthate , undecanoate , or cypionate ester form. These derivatives are hydrolyzed to release free testosterone at the site of injection; absorption rate (and thus injection schedule) varies among different esters, but medical injections are normally done anywhere between semi-weekly to once every 12 weeks. A more frequent schedule may be desirable in order to maintain a more constant level of hormone in the system.  Injectable steroids are typically administered into the muscle, not into the vein, to avoid sudden changes in the amount of the drug in the bloodstream. In addition, because estered testosterone is dissolved in oil, intravenous injection has the potential to cause a dangerous embolism (clot) in the bloodstream.
In addition to increasing your risk of osteoporosis, steroid medications can weaken your muscles. Staying as active as possible will help you to maintain strong muscles and bones. Weight-bearing activities such as walking, dancing, and running will help your muscles stay strong and healthy. Many people report that these activities make them feel better mentally as well. In fact, there are actually chemicals in your brain triggered by significant exercise (usually about 30 minutes per day) that help you to attain a “natural high.” Your doctor can help you to assess your personal condition and decide on an exercise routine that is best for you. However, you should never put yourself through more than reasonable discomfort when exercising.
The ketogenic diet is different because unlike the long-chain saturated fats which require a great deal of effort to be digested by the body, this diet contains medium chain triglycerides (MCT) which are the fats found in milk, cheese, butter, palm oil and coconut oil. These fats are instantly absorbed and when the body is starved of carbohydrates, your liver converts these fats into ketone bodies which pass into the brain and replace glucose as an energy source. This works because only MCTs(medium chain triglycerides have the ability to cross the blood-brain barrier. No other fats have this ability.