By partaking of this essence, you are turned into an enhanced human - a super-soldier, if you will. Thus you gain the following boons:
*A free, one-time cosmetic body resculpt to your ideal or desired appearance, skewing towards a tall and athletic look.
*A one-time full cure of whatever ailments, whether physical, mental, or spiritual, that currently plagues you, and any new ailments of the body, mind, or soul will be prevented from occurring. This includes things such as near/farsightedness, genetic diseases, etc.
*You gain immunity to all diseases, poisons and venom, and the ability to consume anything that isn't actually poisonous or indigestible by your metabolism without any problems.
*Your physical attributes are now enhanced, putting you around several times stronger, faster, and more enduring than record-breaking Olympic athletes.
*You also gain a perfect memory with infinite storage and instant recall with superb indexing. Your processing speed also becomes faster, allowing you to read novels from cover to cover within minutes.
*Your mind has also been enhanced, able to resist hostile mental influence, with the will and resolve to back it up, allowing you to keep going through any amount of hardship; even bloody and broken you will not stop.
*Your reflexes, awareness, balance, and hand-eye coordination are similarly enhanced to superhuman levels, to the point you have a mild combat precognition and danger sense. With your enhanced thought processing speed, the world might as well be in bullet time if you wish to.
*You gain a very potent healing factor, able to regenerate to full health so long as a single drop of blood remains. You can now live for centuries as a perpetually 20-something super soldier, provided you do not die before then.
*Innately gain the kind of skill, abilities, training, and psyche a professional soldier possesses, without negative changes to your personality and/or mental health. You may choose which military branch your... download (?) is primarily from, or all of them if you wish. Oh, and you can keep your cool in all forms of stressful situations.
*Skills, stats, and abilities gained from this serum, and those you pick up in the future, will never degrade due to lack of training or the passage of time.
*You gain the charisma of a natural leader, able to motivate people and keeping up morale. Potency is amplified several-fold when leading a squad of people into a (potentially) stressful situation.
*Abilities granted by this essence can be inherited by your offspring, and you can select what abilities they will gain, their potency, and how/when they will manifest at the time of conception.