4-Andro is a common name for the prohormone 3β-Hydroxy-4-androsten-17-one.  This compound is also referred to as: 4-androstene-3b-ol-17-one, 4-dehydroepiandrosterone, or 4-DHEA.


What is 4-Andro?

4-Andro is a non-methylated prohormone.  It is a precursor to the male hormone Testosterone, the king hormone and necessary compound for any cycle.  4-androsterone is taken orally, it is absorbed through the stomach into the blood stream, then processed in the liver.  In the liver, the inactive prohormone undergoes two transformations carried out by enzymes.  This process converts 4-andro to the active muscle building hormone Testosterone.




4-Andro Dosage

4-androstene-3b-ol-17-one is found in two very popular prohormone supplements by Hi-Tech Pharmaceuticals:

Sustanon 250 has 150mg blend of 4 different of 4-androsterone esters accompanied by 100mg of epiandrosterone, its absorption is enhanced by Cyclosome Delivery.  It is recommended to take 1 tablet daily and not to exceed 2 tablets.

  • This would suggest a dosage of 150-300mg of 4-andro and 100-200mg of epiandrosterone per day.
  • However, many average users report 300-600mg per day.  Experienced users have reported up to 1000mg per day. 
  • 4-Andro cycles are typically run for 4-8 weeks, often used as the test base of a prohormone or SARM cycle, and followed by a PCT.


Stacking 4-Andro 

4-Andro is a great standalone and a necessary component to all cycles.  4-Andro serves as the test base which maintains a proper androgen to estrogen ratio.  This prevents possible lethargy and reduced sex drive which can be induced by other prohormones.

1-Andro / 4-Andro Stack 

Deca/Test Stack

EQ/Test Stack

Get Lean Stack

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