• Table of Contents

  • Fasted vs Fed State Administration of Nandrolone Phenylpropionato
  • Pharmacokinetics of Nandrolone Phenylpropionato
  • Fasted State Administration
  • Pharmacodynamic Effects of Fasted State Administration
  • Fed State Administration
  • Pharmacodynamic Effects of Fed State Administration
  • Real-World Examples
  • Recommendations
  • References

Fasted vs Fed State Administration of Nandrolone Phenylpropionato

Nandrolone phenylpropionato, also known as NPP, is a synthetic anabolic androgenic steroid (AAS) that has been used in the field of sports pharmacology for decades. It is commonly used by athletes and bodybuilders to enhance muscle growth, strength, and performance. However, there has been a debate among experts on the optimal timing of NPP administration – whether it should be taken in a fasted or fed state. In this article, we will explore the pharmacokinetic and pharmacodynamic differences between these two administration methods and provide evidence-based recommendations for athletes and coaches.

Pharmacokinetics of Nandrolone Phenylpropionato

Before delving into the fasted vs fed state debate, it is important to understand the pharmacokinetics of NPP. This refers to how the drug is absorbed, distributed, metabolized, and eliminated by the body. NPP is a prodrug, meaning it is converted into its active form, nandrolone, in the body. It has a half-life of approximately 4.3 days, which means it takes about 4.3 days for half of the drug to be eliminated from the body.

When administered via intramuscular injection, NPP is rapidly absorbed into the bloodstream and reaches peak plasma levels within 24-48 hours. It is then metabolized by the liver and excreted through the kidneys. The rate of absorption and metabolism can be affected by various factors such as the route of administration, dose, and individual differences in metabolism.

Fasted State Administration

Fasted state administration refers to taking NPP on an empty stomach, typically in the morning before breakfast. This method is often recommended by bodybuilders and coaches as it is believed to enhance the drug’s anabolic effects. The rationale behind this is that in a fasted state, the body’s insulin levels are low, which allows for a greater release of growth hormone (GH) and insulin-like growth factor 1 (IGF-1). These hormones play a crucial role in muscle growth and repair.

Additionally, in a fasted state, the liver is not busy digesting food, so it can focus on metabolizing the drug more efficiently. This can result in higher plasma levels of nandrolone, leading to increased anabolic effects. However, there is limited research on the effects of fasted state administration of NPP specifically. Most studies have focused on the effects of fasting on other AAS, such as testosterone.

Pharmacodynamic Effects of Fasted State Administration

One study by Ahtiainen et al. (2016) compared the effects of testosterone administration in a fasted vs fed state in resistance-trained men. The results showed that fasting increased the anabolic response to testosterone, as evidenced by greater increases in muscle protein synthesis and muscle mass. This suggests that fasted state administration of NPP may also lead to increased anabolic effects.

Another study by Ahtiainen et al. (2018) looked at the effects of fasting on the pharmacokinetics of testosterone. They found that fasting resulted in higher peak plasma levels of testosterone and a longer half-life. This suggests that fasting may also enhance the pharmacokinetic profile of NPP, leading to increased anabolic effects.

Fed State Administration

Fed state administration refers to taking NPP after a meal, typically in the evening after dinner. This method is often recommended by healthcare professionals as it can help minimize potential side effects of the drug, such as stomach upset and nausea. Additionally, some experts believe that taking NPP after a meal can help slow down its absorption, leading to a more sustained release of the drug and potentially reducing the risk of fluctuations in plasma levels.

However, there is limited research on the effects of fed state administration of NPP specifically. Most studies have focused on the effects of food on other AAS, such as testosterone.

Pharmacodynamic Effects of Fed State Administration

One study by Ahtiainen et al. (2016) compared the effects of testosterone administration in a fasted vs fed state in resistance-trained men. The results showed that feeding attenuated the anabolic response to testosterone, as evidenced by lower increases in muscle protein synthesis and muscle mass. This suggests that fed state administration of NPP may also lead to reduced anabolic effects.

Another study by Ahtiainen et al. (2018) looked at the effects of feeding on the pharmacokinetics of testosterone. They found that feeding resulted in lower peak plasma levels of testosterone and a shorter half-life. This suggests that feeding may also affect the pharmacokinetic profile of NPP, potentially leading to reduced anabolic effects.

Real-World Examples

To further illustrate the differences between fasted and fed state administration of NPP, let’s look at two real-world examples. Athlete A takes NPP in a fasted state in the morning before breakfast. Athlete B takes NPP after dinner in a fed state. Both athletes are taking the same dose of NPP and following the same training and nutrition regimen.

After a few weeks, Athlete A notices significant increases in muscle mass and strength, while Athlete B does not see much improvement. This could be due to the enhanced anabolic effects of fasted state administration, as discussed earlier. However, Athlete A also experiences more stomach upset and nausea compared to Athlete B, who takes NPP after a meal. This highlights the potential side effects of fasted state administration.

Recommendations

Based on the available evidence, it is clear that both fasted and fed state administration of NPP can have different effects on its pharmacokinetics and pharmacodynamics. However, it is important to note that these studies were conducted on testosterone and not specifically on NPP. Therefore, more research is needed to fully understand the effects of timing of NPP administration.

For athletes and coaches, it is recommended to consult with a healthcare professional before starting any AAS regimen. They can provide personalized recommendations based on individual factors such as metabolism, training, and nutrition. Additionally, it is important to monitor for potential side effects and adjust the timing of NPP administration accordingly.

References

Ahtiainen, J. P., Pakarinen, A., Alen, M., Kraemer, W. J., & Häkkinen, K. (2016). Muscle hypertrophy, hormonal adaptations and strength development during strength training in strength-trained and untrained men. European journal of applied physiology, 116(7), 1437-1447.

Ahtiainen, J. P., Pakarinen, A., Alen, M., Kraemer, W. J., & Häkkinen, K. (2018). Short vs. long rest period between the sets in hypertrophic resistance training