This question appears to be off-topic. The users who voted to close gave this specific reason: First of all, you'd need to know what it is you're getting. Osta-Red contains ostarine, which is another name "Best dating websites for over 40 men prohormones stacks" a substance known as enobosarm. Its chemical formula is or should be 2S 4-cyanophenoxy -N-[4-cyano trifluoromethyl phenyl]hydroxymethylpropanamide. However, the name "ostarine" has also become associated with andarine, which has chemical formula 2S 4-acetamido-phenoxy hydroxymethyl-N- 4-nitrotrifluoromethyl-phenyl -propionamidewhich is a similar but still different beast.
From the Osta-Red site it seems that what you're getting is enobosarm, so let's focus on that. They're specialized in drugs influencing hormonal pathways. The formula given above was not publicly disclosed but it can be found through patents. It is an investigational substance, meaning its full range of effects and side-effects cannot be expected to be completely known.
Anyone who'd try to sell this claiming it is safe or fully approved is lying through their teeth. That's not to say there is no medical literature, but certainly not as much as is needed. On PubMed Central the most interesting thing I'm finding is this: There are other studies regarding selective androgen receptor modulators SARMsof which enobosarm is one, which might be interesting.
One important thing of note is that this stuff is banned by the world anti-doping agency, meaning that if you want to compete in a sport there will be plenty of federations who could find it a reason for exclusion, and you could get into trouble for things outside of competition, such as drug tests in other contexts.
A second important thing is that this is a drug influencing your hormonal system. The idea behind SARMs is that they some of the benefits you could get from hormones such as testosterone or anabolic steroids, while being selective enough in receptor activation to avoid side-effects that would occur from the effects on non-target tissues for example, anything outside of skeletal muscle.
Just because they aren't technically anabolic steroids or hormones doesn't mean it's safe to be messing with your hormonal regulation.
With steroids and hormones, despite the potential for negative effects at least they've been extensively studied and you get some idea of what you're getting yourself into. Now the Osta-Red site at least seems honest about a lot of these points.