one negma a day is impossible. A friend of mine got insane nose bleeding after 3 week at 3 amp. And he was 275lbs.
So one man got nose bleeds from using 228mgs of trenbolone per week so you conclude that it is "impossible" for anyone to tolerate an amp a day, 532mg/week. Now the ester used in Parabolan, HexaHydroBencyl Carbonate ester, allowed for 50mg of actual trenbolone so that gave your friend about 150mg/wk of trenbolone. Trenbolone Acetate, which comes in 100mg/ml and the most commonly used ester, allows for about 65mgs of actual trenbolone per ml.
I can assure you that a cc/day of tren acetate is routinely used by recreational bodybuilders and 2-3ccs, 300mgs/day, by top competitors.
I would be more circumspect when using the word "impossible" when referring to determined top bodybuilders that have dreams of being the best in the world.