---
product_id: 6563022
title: "Doctor's Best Natto Serra for Men & Women - Nattokinase and Serrapeptase Enzyme Supplement, Caps for Circulatory & Immune Health Support, Optimal Digestive Absorption, Non GMO, Vegan - 90 Veg Capsules"
brand: "doctor's best"
price: "€ 34.90"
currency: EUR
in_stock: true
reviews_count: 3
category: "Doctor's Best"
url: https://www.desertcart.ie/products/6563022-doctors-best-natto-serra-for-men-and-women-nattokinase-serrapeptase
store_origin: IE
region: Ireland
---

# Non-GMO, vegan & gluten-free formula Supports healthy circulation & blood flow Dual enzyme synergy: Nattokinase + Serrapeptase Doctor's Best Natto Serra for Men & Women - Nattokinase and Serrapeptase Enzyme Supplement, Caps for Circulatory & Immune Health Support, Optimal Digestive Absorption, Non GMO, Vegan - 90 Veg Capsules

**Brand:** doctor's best
**Price:** € 34.90
**Availability:** ✅ In Stock

## Summary

> 🩺 Unlock your body's natural flow and vitality with Natto-Serra!

## Quick Answers

- **What is this?** Doctor's Best Natto Serra for Men & Women - Nattokinase and Serrapeptase Enzyme Supplement, Caps for Circulatory & Immune Health Support, Optimal Digestive Absorption, Non GMO, Vegan - 90 Veg Capsules by doctor's best
- **How much does it cost?** € 34.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/6563022-doctors-best-natto-serra-for-men-and-women-nattokinase-serrapeptase)

## Best For

- doctor's best enthusiasts

## Why This Product

- Trusted doctor's best brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Joint & Muscle Relief:** Serrapeptase helps reduce inflammation for improved mobility and recovery.
- • **Immune & Sinus Support:** Promotes healthy sinus function and strengthens your immune response.
- • **Energy & Vitality Upgrade:** Feel more energized and mentally clear as circulation and inflammation improve.
- • **Clean & Conscious Wellness:** Non-GMO, vegan, and gluten-free—perfect for mindful, health-driven lifestyles.
- • **Circulation Boost, Naturally:** Enhance blood flow and maintain healthy blood pressure with powerful enzyme synergy.

## Overview

Doctor's Best Natto-Serra combines Nattokinase and Serrapeptase enzymes in a potent, vegan-friendly formula designed to support healthy circulation, immune function, and sinus health. Non-GMO and gluten-free, this supplement promotes optimal blood flow, helps maintain normal blood pressure, and aids in reducing inflammation for enhanced joint mobility and overall vitality.

## Description

At Doctor’s Best, we believe in synergy. Our Natto-Serra blend combines Nattokinase and Serrapeptase enzymes, known for boosting immunity and supporting healthy circulation.* This unique formula optimizes Serrapeptase's effectiveness, ensuring optimal absorption in the intestines.

Review: I highly recommend - I had been having pain in my left leg whenever I walk. Doing research online lead me to believe I either had DVT or a blood clot. I cannot afford medical care so I'm stuck with having to self diagnose. Anyway, I came across info on this product during my research. I had read every review written and knew this was a definite 'have to try' product. I ordered my bottle but didn't have the patience to wait for delivery, so off I went to my local herb store. I bought a bottle and was surprised at the changes I could feel occurring. Many have written reviews in regards to clearing out their sinuses. I don't have any sinus problems so didn't notice anything happening there. Others have written reviews in regards to fibroids. Again, I haven't any uterus problems, so didn't notice anything there. I should note, despite being in my mid 50's, menopause hasn't happened for me. My period started the second day of taking this product. I only mention this because it was not slated to occur at this time. Now, to the leg. As mentioned earlier, I suspect DVT in my leg. Five years ago I had a heart attack resulting in two stents because of clogged arteries. I've been taking this product for 5 or 6 weeks now and feel a difference. It's a slow process, but there is considerably less pain in my leg. My feet no longer feel cold all the time. After 3 weeks of starting the Natto-Serra I was feeling, for about 2 weeks, a tingling in my leg, such as the tingle you get when a limb falls asleep. That has now gone away. My foot for the same time period felt like it had mild sunburn across the top. Shoes were a bit annoying to wear, and this too has passed. I also do not feel as sluggish as I used to. I definitely feel more energetic which I attribute to better circulation. My blood pressure is also beginning to fall back into a normal range. For me, my blood pressure can be anywhere from the 140 over 90 to the 200 over 110 range. Dangerous numbers here. Yesterday's reading was 123 over 78. Yay. I started the Natto-Serra at 1 pill 3 times daily. I didn't really feel results with this so I increased to 2 pills 3 times daily. That was too much, was getting light headed. Now I'm taking 2 pills upon waking and 2 at bedtime. This seems to work for me. Every week that I take the Natto-Serra, I feel a difference in my health. I had read one review in which the person stated he felt worse before he felt better. I kept this in mind when using the product, because like that reviewer, I too felt a bit worse before I started feeling better. I figured I had so much garbage in my veins, there isn't any way this is going to fix itself overnight. As one herbalist once put it, you didn't poison your body overnight, you won't fix it overnight. I am not on any medications such as plavix, blood thinners, blood pressure medicine, etc. I gave these up less than a year after my heart attack when my doctor kept piling on more prescriptions and shrugging her shoulders when I asked questions. So, I started an herbal regimen that for 4 years worked fine but somehow couldn't keep my leg clear of plaque. Anyway, I went from needing a break halfway from my vehicle to the door to the store, to now being able to make that walk and only feel mild to moderate discomfort. I figure at this rate I will be making that walk pain free in about a month or two. I hope this review helps any person giving this product consideration. I'll give an update in about a month.
Review: Improved Performance and Overall Well-Being with Natto-Serra! - I’ve been using this supplement for a few weeks now, and I can honestly say I’m really impressed with the results. It combines two powerful ingredients—Nattokinase and SerraPeptase—that work together in amazing ways, and I’m feeling the benefits both in my daily life and, as a man, in the bedroom! Let’s start with the basics: Nattokinase is known for supporting cardiovascular health and blood flow, while SerraPeptase helps with inflammation and supports overall joint and muscle health. After taking these two ingredients together, I’ve noticed a significant improvement in my circulation, especially in areas that matter most. As a man, I’ve definitely noticed a boost in bedroom performance. I feel like my body is just working better, and my overall energy has improved. However, when I first started taking the supplement, I experienced something a little strange but reassuring. For the first couple of days, I had this sensation in my arms that I can’t quite explain. It felt like a slight “squeezy” feeling, almost like I was wearing a shirt with sleeves three sizes too small. It wasn’t uncomfortable, but it was noticeable, almost like my blood was really flowing and my body was getting a little extra boost. Not sure if that makes sense, but it was a clear sign to me that the supplement was doing its job. Now, I’ve been taking it consistently, and that initial sensation has subsided, but I still feel like I’m more energized and “charged up” in a way. My circulation feels better, and I’m more active and able to recover faster from physical exertion. It also seems to help with reducing inflammation in my joints, which is a huge plus for me, especially after long days or intense workouts. I’ve had less stiffness in my knees and shoulders, which is great for mobility. The best part, though, is how I feel overall. I have more mental clarity, improved energy levels, and just a general sense of well-being. I don’t feel as sluggish or worn out by the end of the day. It’s like this supplement has helped me to feel more youthful and more in tune with my body. If you’re a man looking for a supplement that can support circulation, cardiovascular health, joint mobility, and even improve performance in the bedroom, I highly recommend this product. It’s natural, effective, and I’ve definitely seen results. Just be prepared for a little initial weirdness as your body adjusts—it’s a sign it’s working! I’ll definitely be continuing to take it and would recommend it to anyone looking for an overall health boost.

## Features

- Promotes and maintains healthy sinus and airway function
- Helps maintain blood pressure already in the normal range
- Supports healthy immune response and supports healthy circulation
- Gluten Free, Non-GMO, Vegetarian
- Label images may vary
- Contains Soy
- During the summer months products may arrive warm but desertcart stores and ships products in accordance with manufacturers' recommendations, when provided.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B00DBEVTDE |
| Best Sellers Rank | #19,286 in Health & Household ( See Top 100 in Health & Household ) #75 in Multi-Enzyme Nutritional Supplements #1,657 in Sales & Deals |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,939) |
| Date First Available  | June 10, 2013 |
| Is Discontinued By Manufacturer  | No |
| Item model number  | DRB-00294 |
| Manufacturer  | Doctor's Best |
| Product Dimensions  | 2.13 x 2.13 x 3.75 inches; 2.24 ounces |

## Product Details

- **Brand:** Doctor's BEST
- **Item Form:** capsules
- **Item Package Quantity:** 1
- **Manufacturer:** Doctor's Best
- **Package Information:** Bottle

## Images

![Doctor's Best Natto Serra for Men & Women - Nattokinase and Serrapeptase Enzyme Supplement, Caps for Circulatory & Immune Health Support, Optimal Digestive Absorption, Non GMO, Vegan - 90 Veg Capsules - Image 1](https://m.media-amazon.com/images/I/616CnpkFRKL.jpg)

## Questions & Answers

**Q: Does anyone know how many milligrams of each enzyme is in this product?**
A: Dear Valued Customerm,Thank you for contacting Swanson Health Products. We are more than happy to provide the information we have on the product ingredients. Please review the product label below:Supplement FactsServing Size 1 capsuleServings per container 90 servings  Amount per serving% Daily ValueCalcium (from Serrateric) 24.5 mg 2% Serrapeptase enzyme(serratiopeptidase activity units) 40,000 SPU  Nattokinase (fibrinolytic activity units) 2,000 FU   Daily Value not established.Other Ingredients: Serrateric, modified cellulose (vegetarian capsule). Contains SoySuggested Adult Use: Take 1 capsule up to 3 times daily, without food, or as recommended by a nutritionally-informed physician. Do not use this product if you are pregnant or nursing, are allergic to soy, or if you have a blood coagulation disorder. If you are taking an anticoagulant (blood-thinning medication) or vitamin K, consult a physician before taking this product. Store in a cool dry place.*Non-GMO *Gluten Free *Vegan *Veggie CapsSerrateric is a trademark of Deerland Enzymes, Inc.If more information is required we suggest contacting Doctor's Best. If you should have any future concerns or questions please do not hesitate to contact us. Take care and have a lovely day. Our quality, value and customer service have made Swanson Health Products a trusted source of nutritional supplements since 1969.  To help us build this privileged relationship with you, we welcome your comments and suggestions, as it is our pleasure to serve you at any time. Theresa S.Swanson Health ProductsChat SpecialistCustomer Support Services

**Q: It states this product is non-gmo, yet, one of the major ingredient listing there is "modified cellulose". isn't "modified cellulose" typical gmo?**
A: Please know that the active ingredient in this supplement is non-GMO.

**Q: I notice that Serateric is listed in "other ingredients, is that substance magnesium stearate?**
A: I don't know. based on information from other answers on Amazon.  SerratericTM is a specialize encapsulation system.   mzzbee answered in a post on 10/26/14:  Pulled from iHerb:"8-12-2013 - RESPONSE FROM: Doctor's Best: We regret the miscommunication to iHerb because Doctor's Best removed the usage of Hydroxy propyl Methyl cellulose- Phthalate ("hpmcp") in Q4 2012. All Doctor's Best Serrapeptase products are currently manufactured with a specially designed Serrateric system which encapsulates the Serrapeptase ingredient itself; not the capsule. Serrateric is a non-GMO natural coating-free acid protection system. Serrateric is a combination of approved food additives (self-affirmed GRAS) that work to provide gastric protection for pH sensitive enzymes without the need for additional coating. The Serrateric system dissolves by coming in contact with bile salts found only in the small intestine assuring bio-absorption of the Serrapeptase active ingredient past the stomach pH environment. Doctor's Best does not believe the products provided previously were unsafe but we do recognize advances in science and technology afford us the ability to consistently improve our products and formulations. We sincerely believe we have partnered with our manufacturer to develop the safest and most effective Serrapeptase product on the market."

**Q: Is this a good thing to take to prevent a stroke?**
A: These enzymes can thin the blood, which is good to help prevent strokes, but they are no substitute for healthy "lifestyle" choices, such as proper diet.

## Customer Reviews

### ⭐⭐⭐⭐⭐ I highly recommend
*by C***L on January 31, 2016*

I had been having pain in my left leg whenever I walk. Doing research online lead me to believe I either had DVT or a blood clot. I cannot afford medical care so I'm stuck with having to self diagnose. Anyway, I came across info on this product during my research. I had read every review written and knew this was a definite 'have to try' product. I ordered my bottle but didn't have the patience to wait for delivery, so off I went to my local herb store. I bought a bottle and was surprised at the changes I could feel occurring. Many have written reviews in regards to clearing out their sinuses. I don't have any sinus problems so didn't notice anything happening there. Others have written reviews in regards to fibroids. Again, I haven't any uterus problems, so didn't notice anything there. I should note, despite being in my mid 50's, menopause hasn't happened for me. My period started the second day of taking this product. I only mention this because it was not slated to occur at this time. Now, to the leg. As mentioned earlier, I suspect DVT in my leg. Five years ago I had a heart attack resulting in two stents because of clogged arteries. I've been taking this product for 5 or 6 weeks now and feel a difference. It's a slow process, but there is considerably less pain in my leg. My feet no longer feel cold all the time. After 3 weeks of starting the Natto-Serra I was feeling, for about 2 weeks, a tingling in my leg, such as the tingle you get when a limb falls asleep. That has now gone away. My foot for the same time period felt like it had mild sunburn across the top. Shoes were a bit annoying to wear, and this too has passed. I also do not feel as sluggish as I used to. I definitely feel more energetic which I attribute to better circulation. My blood pressure is also beginning to fall back into a normal range. For me, my blood pressure can be anywhere from the 140 over 90 to the 200 over 110 range. Dangerous numbers here. Yesterday's reading was 123 over 78. Yay. I started the Natto-Serra at 1 pill 3 times daily. I didn't really feel results with this so I increased to 2 pills 3 times daily. That was too much, was getting light headed. Now I'm taking 2 pills upon waking and 2 at bedtime. This seems to work for me. Every week that I take the Natto-Serra, I feel a difference in my health. I had read one review in which the person stated he felt worse before he felt better. I kept this in mind when using the product, because like that reviewer, I too felt a bit worse before I started feeling better. I figured I had so much garbage in my veins, there isn't any way this is going to fix itself overnight. As one herbalist once put it, you didn't poison your body overnight, you won't fix it overnight. I am not on any medications such as plavix, blood thinners, blood pressure medicine, etc. I gave these up less than a year after my heart attack when my doctor kept piling on more prescriptions and shrugging her shoulders when I asked questions. So, I started an herbal regimen that for 4 years worked fine but somehow couldn't keep my leg clear of plaque. Anyway, I went from needing a break halfway from my vehicle to the door to the store, to now being able to make that walk and only feel mild to moderate discomfort. I figure at this rate I will be making that walk pain free in about a month or two. I hope this review helps any person giving this product consideration. I'll give an update in about a month.

### ⭐⭐⭐⭐⭐ Improved Performance and Overall Well-Being with Natto-Serra!
*by R***N on December 29, 2024*

I’ve been using this supplement for a few weeks now, and I can honestly say I’m really impressed with the results. It combines two powerful ingredients—Nattokinase and SerraPeptase—that work together in amazing ways, and I’m feeling the benefits both in my daily life and, as a man, in the bedroom! Let’s start with the basics: Nattokinase is known for supporting cardiovascular health and blood flow, while SerraPeptase helps with inflammation and supports overall joint and muscle health. After taking these two ingredients together, I’ve noticed a significant improvement in my circulation, especially in areas that matter most. As a man, I’ve definitely noticed a boost in bedroom performance. I feel like my body is just working better, and my overall energy has improved. However, when I first started taking the supplement, I experienced something a little strange but reassuring. For the first couple of days, I had this sensation in my arms that I can’t quite explain. It felt like a slight “squeezy” feeling, almost like I was wearing a shirt with sleeves three sizes too small. It wasn’t uncomfortable, but it was noticeable, almost like my blood was really flowing and my body was getting a little extra boost. Not sure if that makes sense, but it was a clear sign to me that the supplement was doing its job. Now, I’ve been taking it consistently, and that initial sensation has subsided, but I still feel like I’m more energized and “charged up” in a way. My circulation feels better, and I’m more active and able to recover faster from physical exertion. It also seems to help with reducing inflammation in my joints, which is a huge plus for me, especially after long days or intense workouts. I’ve had less stiffness in my knees and shoulders, which is great for mobility. The best part, though, is how I feel overall. I have more mental clarity, improved energy levels, and just a general sense of well-being. I don’t feel as sluggish or worn out by the end of the day. It’s like this supplement has helped me to feel more youthful and more in tune with my body. If you’re a man looking for a supplement that can support circulation, cardiovascular health, joint mobility, and even improve performance in the bedroom, I highly recommend this product. It’s natural, effective, and I’ve definitely seen results. Just be prepared for a little initial weirdness as your body adjusts—it’s a sign it’s working! I’ll definitely be continuing to take it and would recommend it to anyone looking for an overall health boost.

### ⭐⭐⭐⭐⭐ Review
*by W***A on June 12, 2024*

Produto chegou rápido comparado com outras lojas online, bem empacotado, sem nenhum sinal de avaria, uma pena que nattokinase de qualidade é tão caro para o padrão da maioria dos brasileiros kkk

## Frequently Bought Together

- Doctors Best Natto-Serra, Supports Circulatory & Immune Health, Non-GMO, Vegan 90 Veggie Caps
- Doctors Best Lumbrokinase, Supports Heart Function, 720,000 Units Per Serving, 60 Veggie Caps
- Doctor's Best Nattokinase, Non-GMO, Vegan, Gluten Free, 270 Veggie Caps

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-05*