Truthstream Media has a great video covering this:

https://altcensored.com/watch?v=_Y_ubswux58

 then would it be a sin to use it in daily life?? 

I say it would be a sin for married people to take it if they know that it diminishes their fertility.

There are other artificial sweeteners avaliable, right?And we can always drink coffee pure and bitter. The bitter becomes sweet after you get used to it.

I think maybe I will not call it a contraceptive since it only "reduces" fertility instead of canceling it. So I don't think modern people would actually use it for that purpose and most people using it will still have a big chance of having children. There are lots of other food that reduce fertility, just maybe not as much.
https://celagem.com/en/clinica-de-fertilidad/foods-that-reduce-fertility/
https://www.medicalnewstoday.com/articles/64192#2

"The study showed that women who ate more than two portions a day of low fat dairy foods were 85 per cent more likely to be infertile due to ovulatory disorders than those who only ate it less than once a week.
Conversely they found that women who ate full-fat dairy foods, including ice cream, more than once per day had a 25 per cent reduced risk of infertility due to ovulatory disorders compared to those who ate full-fat dairy foods only once a week."


But it is possible that stevia was put in the market so widely as a depopulation tool and so as the other food.

I think maybe I will not call it a contraceptive since it only "reduces" fertility instead of canceling it. 

By the same rationale, you should also not call condoms or the pill birth control, since they too only reduce fertility instead of cancelling it.

The intent is the whole point. Almost nobody actually use stevia to prevent pregnancy.

And as I mentioned above, would using low fat dairy products be a sin too then if you know it reduces fertility and maybe even more significantly than stevia?

I would reconsider my opinion here.

When the woman uses hormonal contraceptives, neither the man nor the woman can require the debt. That much is clear. Even if it is taken for medical reasons.

About things that reduce fertility, and are not also abortive, like hormonal contraceptives, things are not so clear.

As the experiments are only animal and not human, and the reduction in fertility is not  scientifically certain in humans, and not over 90%, as in hormonal contraceptives, I would say that it is not a sin to use it.

Otherwise, it would be necessary to make a comprehensive research about anything we ingest. It sounds rather absurd to me.

I am obviously no expert, but using logic can go a long way.

If the couple uses it with the intention of reducing fertility, it would probably be only a venial sin, in my opinion.