this is a broad question bro, it depends on the compound and the induvidual
The onset time for the main effects of steroids used in gym environments can vary depending on the specific type of steroid, its form (oral or injectable), and the individual's body response. Here’s an overview of the onset times for common steroids used for performance enhancement:
1. Testosterone (Various Forms)
- Onset Time (Injectable):
- Testosterone enanthate or cypionate: 3–5 days for the initial effects, with peak blood levels occurring around 2–3 weeks after administration.
- Testosterone propionate: 24–48 hours for initial effects due to its faster-acting nature.
- Onset Time (Oral):
- Methyltestosterone: Effects can be seen within 24–48 hours.
2. Nandrolone (Deca-Durabolin)
- Onset Time:
- Nandrolone decanoate (injectable) generally takes 3–4 weeks to show noticeable results. It has a longer half-life, so the effects are slower to kick in compared to faster-acting steroids.
- Shorter ester forms (such as nandrolone phenylpropionate) can show effects within 7–10 days.
3. Dianabol (Methandrostenolone)
- Onset Time:
- Oral form, typically 24–48 hours. Rapid onset due to its fast-acting nature. Strength and mass gains can be seen within the first few days of use.
4. Anadrol (Oxymetholone)
- Onset Time:
- Effects are typically felt within 24–48 hours. It is known for rapid weight gain and strength increases due to fluid retention and enhanced red blood cell production.
5. Trenbolone (Various Forms)
- Onset Time (Injectable):
- Trenbolone acetate (faster-acting ester) can show effects within 2–3 days.
- Trenbolone enanthate (slower-acting ester) can take 1–2 weeks for initial noticeable effects, with peak effects occurring around 2–3 weeks.
6. Winstrol (Stanozolol)
- Onset Time:
- Oral and injectable forms typically show effects within 2–3 weeks, though some users report feeling a slight boost in energy and strength in the first few days.
7. Masteron (Drostanolone)
- Onset Time:
- Injectable forms of Masteron (propionate) can show noticeable results within 1–2 weeks due to its relatively fast-acting nature.
8. Boldenone (Equipoise)
- Onset Time:
- Injectable forms typically take 3–4 weeks to show significant effects, with peak benefits seen after 6–8 weeks due to its slow-release properties.
General Timeline for Steroid Effects:
- Initial Effects: Users might notice increased energy, strength, or endurance within the first few days to weeks (depending on the steroid).
- Muscle Growth & Fat Loss: More noticeable gains in muscle size, strength, and fat reduction often take several weeks (2-6 weeks) depending on the steroid type.
- Peak Effects: Maximum benefits in terms of muscle growth and performance are typically seen after 4–8 weeks.
Factors Affecting Onset Time:
- Steroid Ester (if injectable): The ester attached to the steroid affects its release time. Short esters (like propionate) act faster, while long esters (like enanthate or decanoate) take longer.
- Formulation: Oral steroids tend to show quicker effects than injectables.
- Dosage and Cycle Length: Higher doses or longer cycles can lead to faster and more noticeable effects.
- Individual Response: Some individuals may respond more quickly to steroids, while others might take longer to notice effects.
While the onset of effects varies with each steroid, the general pattern is that fast-acting steroids (such as testosterone propionate, Dianabol, and Anadrol) show effects in a matter of days to a week, while slower-acting steroids (like Deca-Durabolin and Equipoise) may take 3-4 weeks or longer for full effects to be noticeable.
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few different opinions related to half life & active life of these compounds . I know well respected endocrinologists who still prescribe at 2-3 weekly intervals based on Prescribing information leaflet ( not really possible for BB doses )
Appetite, sleep, mood, energy are almost over night. Permanent results take a few years 
