Some are, some aren't, it depends on what they see with bloodwork. Anti-aging practices have changed a lot in the past 5-6 yrs. I know, with medical certainty, that 200 can be used but its less common because we often see the test going too high (particularly the free testosterone) or erythrocytosis over time. Remember, this is long term treatment...for years, so its important to stay in the mid-upper normal ranges.