The Half Lives of the Most Popular Anabolic Steroids

It’s common for published values to be different, because pharmacokinetic studies are often performed on only a few subjects at a time, and there can be considerable variability between subjects. Further, there ends up being a confusion between the elimination process and the distribution process, which is variable particularly in the earlier part of the process. For example, reported half-life values for nandrolone decanoate in humans range from 7 to 12 days.

For this reason, it’s best to not take any one report overly literally, but instead to get the best reading of all the data that’s available. Fortunately, for anabolic steroids the half life is very closely related to a predictable property, the partition coefficient (this is generally approximately equal to the ratio between lipid solubility and water solubility.) Where the only difference between two steroid esters is the number of carbons – arrangement being the same or similar! – then each added carbon adds about a day to the half life.

With this information, to make a best estimate for the half life of one steroid, data from similar steroids can be used as well.

For purposes of calculating recovery or for calculating frontloading, these figures have always worked well for anabolic steroid half lives:

• Acetate esters: About 1 day
• Propionate esters: About 2 days
• Phenylpropionate esters: About 3 days
• Enanthate esters: About 5 days
• Cypionate esters: About 6 days
• Decanoate esters: About 10 days
• Undecanoate esters: Really not established from practice. From extrapolation, probably about 11 days. Does not appear to be over about 14 days, or much if any less than 11 days. I use 14 days for recovery calculation in the case of Equipoise, though that might be a larger number than necessary.

With regard to the parent steroid, theory would suggest adding a day for 19-nor, subtracting some small amount for 5-alpha reduction, or adding some small amount for having more than one double bond, and some unknown adjustment for drug metabolism differences. But in practice there seems no need for such adjustments. Accounting for the ester alone seems sufficient.

T3’s half life is variable between individuals but roughly speaking is about a day. There would be no use for a numeric value in practice because T3 should not be frontloaded, and calculating what day it has cleared is not important.

Clenbuterol’s half life is about a day and a half.

Clomiphene, Tamoxifen all have half lives of about 5 days. The anti-aromases Anastrozole and Letrozole have half lives of about 2 days.

Build Muscle and Lose Fat with Astralean (Clenbuterol)

Astralean is the Clenbuterol tablets by Alpha Pharma. Clenbuterol was originally prescribed as an asthma medication used in the treatment of bronchitis and other breathing related problems. Clenbuterol is now taken by bodybuilders and weightwatchers for its amazing fat burning qualities. Astralean (Clenbuterol), unlike other fat burners has some unique fat burning abilities without causing any serious side effects. It is best used for short periods of time (up to 2 weeks) as the body get used to the drug. It is recommended to take Clenbuterol for two weeks on and two weeks off.

Astralean (Clenbuterol) is a very effective fat burner and weight loss aid being a non anabolic steroid. The main function of Clenbuterol is to boost the production and secretion of catabolic hormones, which are produced in the adrenal region of the brain. These hormones have different types of functions and purposes. Initially they would appear to alter the contractile characteristics of smooth muscle. They will be able to stimulate some and inhibit others. It has a soothing effect in patients suffering from breathing problems.

Clenbuterol is a great help for weight loss and fat burning. It is called thermogenesis - a process by which the body increases its metabolic rate above normal and thus liberates its heat, or energy. This in turn happens due to a rise in blood pressure, increase in heart beat by stimulating heart muscle and an increase in body temperature, which finally results in burning of calories. So Clenbuterol increases the rate of burning of protein and fat in the body and this results in loss of adipose tissue/fat. This in turn results into a harder and leaner physique by means of loss in weight. It reverses the effect of insulin thereby resulting into release of glycogen that goes back into blood as glucose; gradually reaches a stage when further storage or use of glycogen is not at all possible.

Clenbuterol 40mg is a beta 2 adrenergic agonist with many commonalities with ephedrine. But comparatively its results are better and longer in terms of efficacy and efficiency. Clenbuterol acts as a thermogenic drug, thermogenics being supplemental diet that are used for stimulating the burning of fat in body. Thermogenics also increase the metabolism of fat tissues in the body thereby generating heat, called thermogenesis.

Clenbuterol allows patients to eat heavy food without bothering about an increase in body fats. It increases physical strength and ability to perform more workouts. It is considered as an alternative to steroids. Clenbuterol has functionality similar to mild steroids and thus it can be used by bodybuilders to increase strength and muscle hardness. It is a stackable drug and hence can be administered with other steroids or drugs.

How to cycle Clen and Clen Side Effects and Doses

Clenbuterol is a beta-2 agonist and is used in many countries as a broncodilator for the treatment of asthma. Because of it’s long half life, Clenbuterol is not FDA approved for medical use. It is a central nervous system stimulant and acts like adrenaline. It shares many of the same side effects as other CNS stimulants like ephedrine. Contrary to popular belief, Clenbuterol has a half life of 35 hours and not 48 hours.

Dosing and Cycling Clenbuterol comes in 20mcg tablets, although it is also available in syrup, pump and injectable form. Doses are very dependent on how well the user responds to the side effects, but somewhere in the range of 5-8 tablets per day for men and 1-4 tablets a day for women is most common. Clenbuterol loses its thermogenic effects after 6-8 weeks when body temperature drops back to normal. It’s anabolic/anti-catabolic properties fade away at around the 18 day mark. Taking the long half life into consideration, the most effective way of cycling Clen is 2 weeks on/ 2 weeks off for no more than 12 weeks. Ephedrine can be used in the off weeks. Ephedrine will raise metabolic levels by about 2-3 percent and 200mg of DNP raises metabolic levels by about 30 percent. Clenbuterol raises metabolic levels about 10 percent and it can raise body temperature several degrees.

DNP is by far the most effective fat burner but many people will never use it because of the risks associated with it. It also offers no anti-catabolic benefit. Although it does have anti-catabolic effect, ephedrine short half life prevents it from being all that effective.

As far as side effects, Clenbuterol’s are certainly milder than DNP’s, and some would even say milder than an ECA stack. There is no ECA-style crash on Clenbuterol and many users find it easier on the prostate and sex drive. This may in part be due to the fact that Clen is generally used for only 2 weeks at a time.

Side effects

• Nausea
• Nervousness 
• Dizziness
• Drowsiness 
• Dry mouth
• Facial flushing
• Headache
• Heartburn
• Increased blood pressure
• Increased sweating
• Insomnia
• Lightheadness
• Muscle cramps
• Tremors
• Vomiting
• Chest pain

The most significant side effects are muscle cramps, nervousness, headaches, and increased blood pressure. Muscle cramps can be avoided by drinking 1.5-2 gallons of water and consuming bananas and oranges or supplementing with GNC potassium tablets at 200-400mg a day taken before bed on an empty stomach. Headaches can easily be avoided with Tylenol Extra Strength taken at the first signs of a headache. You may need to take double the recommended dose.

Post-Cycle Therapy: Clenbuterol is used post cycle to aid in recovery. It allows the user to continue eating large amounts of food, without worrying about adding body fat. It also helps the user maintain more of his strength as well as his intensity in the gym. Diet: Roughly the same as on cycle.

Fat loss: The most popular use for Clenbuterol, it also increases muscle hardness, vascularity, strength and size on a caloric deficit. For the most significant fat loss, Clen can be stacked with T3. Diet: A high protein (1.5g per lb of bodyweight), moderate carb(0.5g to 1g per lb of bodyweight), low fat diet (0.25g per lb of bodyweight) seems to work best with Clenbuterol.

Clenbuterol has mild steroid-like properties and can be used by non anabolic steroids using bodybuilder to increase LBM as well as strength and muscle hardness. Diet: A moderate carb, high protein, moderate fat diet work well.

Stimulant/Performance Enhancement: It can be used as a stimulant, but an ECA stack may be a better choice because of it’s much shorter half-life. Diet: To take full advantage of the stimulatory effects of Clen, Carbs must be included in the diet. Keto diet do not work well in this case.

Is Clen for you?
The same precautions that apply to Ephedrine must be applied to Clenbuterol, although some people find ECA stacks harsher than Clenbuterol. It should not be stacked with other CNS stimulants such as Ephedrine and Yohimbine. These combinations are unnecessary and potentially dangerous. Caffeine can be used in moderation before a workout for an extra kick, although its diuretic effects may shift electrolyte balance. Drink more water if you use Caffeine.

Most users that report bad side effects and discontinue use are those who use high doses right at the start of the cycle. The worst side effects occur within the first 3-4 days of use.
A first time user should not exceed 40mcg the first day.

Example of a first cycle:
Day1: 20mcg
Day2: 40mcg
Day3: 60mcg
Day4: 80mcg
Day5: 80mcg(Note: Increase the dose only when the side effects are tolerable)
Day6-Day12: 100mcg
Day13: 80mcg (Tapering is not necessary, but it helps some users get back to normal gradually)
Day14: 60mcg
Day15: off
Day16: off
Day 17: ECA/ NYC stack

Example of a second cycle:
Day1: 60mcg
Day2: 80mcg
Day3: 80mcg
Day4: 100mcg
Day5: 100mcg
Day6-Day12: 120mcg
Day13: 100mcg
Day14: 80mcg
Day15: off
Day16: off
Day 17: ECA/ NYC stack

Do not take Clenbuterol Past 4pm and drink plenty of water: 1.5-2 gallons a day.
All brands are not equal when it comes to Clenbuterol, different brands will yield different results. That about covers everything.