Astroglide and K-Y are both two best known personal lubricants brand. Both are doctor recommended for vaginal dryness. Each is frequently used during sexual intercourse and for use with sex toys and other sexual aids. Additionally, since water-based lubricants do not breakdown latex condoms, they are superior to silicone-based products. If both are so effective, why do some people prefer one over the other? Let’s have a quick look at both, perhaps an apples to apples comparison of the two will provide a definitive answer.
Astroglide Personal Lubricant
Astroglide was invented by a scientist working on the cooling system for the space shuttle program. It was originally intended to remove anhydrous ammonia from the cooling system, but ended up being so slippery, it had more wide reaching uses on Earth.
Astroglide personal lube has a slightly acidic pH and does not contain fragrances, perfumes, or dyes. The acidic pH inhibits the growth of yeast, while the lack of fragrances, etc prevents skin irritation, sensitivity, pain, or allergic reactions. Many people feel that Astroglide provides a lubrication that is slicker and longer lasting than that provided by K-Y. If this is true, it would come from the small amount of glycerin that Astroglide contains.
K-Y Personal Lube
K-Y has been produced 1904. Originally intended to be used to lube instruments during medical procedures, it had to be naturally based and could not contain any substances that would cause irritation or promote yeast or bacteria growth. It has been recommended by doctors as a sexual lubricant for almost 100 years. As with Astroglide, it does not contain perfumes, dyes, or fragrances. Unlike Astroglide, it is not acidic. Water-based lubes are known to be absorbed by the human body rather quickly and usually need to be reapplied, but K-Y has a reputation for drying more quickly that others.
Astroglide vs KY: Final Thoughts
With the case for each presented, it may well seem as if it really does come down to personal preference. A few points remain, though. The glycerin in Astroglide may provide a longer lasting lube, but glycerin has been linked to an increased chance of yeast infections, negating its acidic benefit. Having to reapply K-Y frequently can be annoying and lead to pain during anal sex.
So, our final thoughts are these: Astroglide is the better lube for anal sex for two reasons, both centered around glycerin. The superior glide and longevity of each application will prevent pain during anal intercourse and the chance of a yeast infection is lessened when used anally. On the other hand, K-Y is better for vaginal intercourse. While you may have to reapply it, K-Y does not affect the vaginal environment. K-Y can also be reactivated by saliva, meaning that you can engage in oral sex to moisten the lube again, adding an exciting twist to play time.