Boldenone Cypionate

Only the ester. It is cleaved off in the body, leaving the same boldenone. The cypionate ester is shorter and lighter: by calculation each milligram contains 69.8 percent boldenone, the undecylenate 63.3 percent. How fast levels rise and fall with the cypionate has not been measured in humans.

No. ClinicalTrials.gov lists no trial and there are no controlled human studies of either the cypionate or the undecylenate. Boldenone was developed for veterinary use and has been used in horses for decades. According to a review there are hardly any studies on its effects even there.

In an 8-week rat study with boldenone undecylenate inflammation markers rose, thyroid hormones fell and TSH rose. A second study saw rising liver and kidney markers and falling HDL, a third a heavier heart and raised markers of heart muscle damage. In rabbits liver and kidney markers also rose. The amounts were high and the results cannot be transferred directly to humans.

Anabolic steroids bind to the androgen receptor and promote muscle building and strength. In studies with athletes strength rose by 5 to 20 percent and weight by 2 to 5 kg, mainly through more fat-free mass. They stimulate red blood cell production. Aromatase and 5-alpha reduction convert part of them into oestrogen or stronger androgens.

For anabolic steroids in general: falling HDL cholesterol, rising blood pressure, acne, more body hair, more aggression and the body's own hormone production staying suppressed for months after stopping. For boldenone itself there are no human data.

A literature review found 14 described infections after steroid injections: 8 abscesses, 3 HIV infections, one each of hepatitis B and C and one fungal eye infection. The authors consider them avoidable with education and sterile technique. According to the review a quarter of adolescent users in the USA shared needles.