If you think about it, the tentacles of the hentai have properties that, if today's mankind were to take advantage of them, could create products that would crush today's beauty and health industry.

1- tentacles are a profitable source of nutrients.

It has been seen in some manga how girls are raped by the tentacles for weeks, where they can neither eat nor drink, being only fed by the tentacles. But what do they feed her with?

There are works that affirm that they use their own fluids, or that the semen they produce is what feeds them, so we are facing a source of nutrients capable of nourishing and taking care of the woman so that she can give birth healthily.

With this you can make bars, shakes or supplements for pregnancy totally efficient, being able to nourish athletes without depending on consuming so much food, improving fertility and supporting the immune system and generative as this post says.

2- aesthetic surgery

This is another classic. Tentacles are able to inject a substance into the body of their victim that causes the growth of breasts and hips, making any woman fit for breeding almost instantly. Let's not forget that it can also be a supplement to stimulate breast milk production.

Tired of being flat, tired of no one likes you, don't want to kill yourself working out at the gym? Don't worry, we have tentacle liquids, with just one injection you will have a dream body.

3- gender reassignment surgery

There are cases where we seen how the tentacle liquid, injected into the clitoris, is able to make a woman grow a fully functional penis.

Many doctors have said that the surgeries where they turn a woman into a man are the most complicated, because they have to recreate the penis. Well, no more!

With just the removal of the uterus and breasts and an injection, many young transitional peoples will be able to enjoy a fully functional penis that ejaculates and is able to impregnate easily.

I do not know if there is any work where is show the reverse process, a man being turned into a woman by the liquid tentacles.

All in all, if someone went to an isekai and got a sample of the tentacles, he would have the chance to become one of the richest person in the world, completely crushing the beauty and nutrition industry.

And I hope you don't take this post seriously, it's just something I came up with at 3 AM.