Right now there are no proven side effects of nattokinase. Which is great news if you want to use this incredibly powerful enzyme to keep your blood pressure normal or if you have problems with your circulation like I do (I wear a compression stocking on my legs to send the blood back around my body). At one time I was prescribed warfarin, and I am really glad I was able to finish taking this dangerous medication.
Although I wear compression stockings to keep my blood flowing, my blood vessels still need assistance in helping my blood flow freely. This is one of the reasons I take nattokinase, twice daily.
If you are currently prescribed long term warfarin, you should know that you are at a higher risk of a brain hemorrhage (please do further research or contact your doctor right away, if this is new information to you). You may also be surprised to learn that warfarin, although a stroke preventing drug, may actually cause a different type of stroke, called a hemorrhagic stroke (read about it here).
The great news is though, that warfarin is being phased out in people who are at high risk of arterial fibrillation (symptoms range from fainting, dizziness, palpitations and congestive heart failure) It is being replaced (or advised as an alternative) by newer, safer drugs. Although approved by the FDA, my reservation with this is really, how safe are these drugs in the long term. Remember, warfarin was also safe to use when it was first released.
Time will tell, and this is certainly food for thought. But it is just another reason why the natto enzyme could be more readily used or even prescribed to keep your blood thin (for certain patients anyway). And certainly used as protection against coronary heart disease.
When Should You Not Take Nattokinase?
Is the nattokinase enzyme safe to use? Yes, if you are a healthy person with no blood disorders or if you are pregnant and then it is dangerous to take it. As we’ve discussed, there is not enough known about the effects (or even side effects) of this enzyme on pregnant woman, or on the fetus itself. So if you are pregnant, either see your doctor before taking it, or refrain from taking raw natto or any kind of nattokinase supplement during your term. It’s always better to be safe than sorry.
Also, if you have any kind of injury or trauma, then the best advice is not to take this enzyme. We know that nattokinase helps to thin the blood. So if you have an injury that is bleeding externally or internally like a stomach ulcer, then you should exclude it from your diet or supplement regime.
The same also goes for any kind of surgery, even dentistry type surgery. Any time your body is at risk of losing too much blood, is a good time not to take nattokinase.
You should also avoid taking the enzyme if you are currently taking any kind of blood thinning treatment like warfarin, aspirin, heparin and ibuprofen (note that some of these are normally used for pain relief, but bare them in mind if you consider taking nattokinase). Your body does not need two agents acting in your cardiovascular system reducing it’s ability to form clotting as this could stop your bodies natural process of repairing itself.
However, your body does need an ability to coagulate (if you cut yourself, for example) and if your blood is unable to clot then you would lose too much blood. Also, if you encounter a tiny hole in a blood vessel, your blood must be allowed to clot to repair these holes.
And if you currently take any kind of anti-coagulant medication, you should not use nattokinase as the combination of both of these can cause you serious bruising from even the slightest touch of your skin.
Nattokinase also lowers blood pressure, so if you are anemic or generally suffer from low blood pressure, then you should again, not take this enzyme as it will further reduce your blood pressure, causing you nausea, dizziness and the possibility of you passing out.
What Could It Do to You if You Did Take It?
So if you do want to take it and want to know the correct nattokinase dosage, please read the article that link points to.
And to conclude, what are the potential side effects of taking nattokinase.
- Blood unable to clot (if used with prescription medication)
- Bruising and bleeding
- Severely reduce blood pressure
- Nausea and dizziness
Again, if you are pregnant or are unsure if you should take nattokinase, always consult your doctor.
Common sense should prevail when using nattokinase. It might be 100% natural, but it can seriously affect your blood system, particularly if it is used with other medication. You may think it’s only a little tablet and because of what it says on the tub, that it is perfectly safe. But it is a very powerful enzyme, which can work wonders for the average person who wants to regulate their blood pressure or help their blood flow easier. But if you are taking other anti-coagulant medication, it may be harmful to you. Always consult your doctor before taking nattokinase in these cases.