Page 1 - Reviews - Natural Factors, Zymactive®, 90 Enteric Coated Tablets - iHerb

Customer Ratings & Reviews

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4.6
Based on 492 ratings
373
73
32
6
8
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What customers say
Customers have mixed experiences with Natural Factors Zymactive Double Strength. Many users report significant pain relief from conditions like arthritis, tendonitis, bursitis, and sciatica. The enteric-coated tablets are appreciated for their effectiveness in systemic enzyme delivery without being degraded by stomach acid. Some customers noticed improvements in digestion and reduced inflammation, aiding in faster recovery post-exercise and better overall well-being. However, a few users experienced issues such as the tablet not breaking down properly or minimal effects after short-term use. There are also concerns about its blood-thinning properties, especially for those on medication like warfarin. Despite some drawbacks, many find it a valuable addition to their health regimen.
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Customer reviews (486)
Product reviews solely reflect the views and opinions expressed by the contributors and not those of iHerb. iHerb does not verify or endorse any claims made in these reviews. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
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Reviews from Canada
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English
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iHerb customer
Posted on Oct 30, 2025
Canada
2
0
0
0
Verified purchase
I am switching my medication from the prescription one to the natural ones and I was afraid from the transition but it only took couple of days until my body got used to it and I am feeling great.
ArcoftheSun
Posted on Mar 23, 2025
Canada
54
0
0
21
Great for reducing fibrin in the body and decreasing mucus
Verified purchase
I take it to help keep my system clear of inflammation and fibrin... I find it helps reduce joint aches in particular. Just have to take it with a 2 to 3 hour window on both sides of ingesting any food with protein. I suddenly developed restless leg syndrome, and as well as being stricter on sugar, I also took Zymactive to help clear my circulation, and it made a difference within a day of starting to take it.
iHerb customer
Gold
Posted on Nov 2, 2025
Israel
328
0
1
35
great . was looking for immune system and digestive
Verified purchase
eased my stomach. i suffer from pin worms. trying to get rid of them with ither supplements too. great benefits. sealed package. looks like the digestive enzymes are working. as my stomach feals beeter only fro the first capsule. amazing quality. i bought two . will definitely order more for the up coming winter. and hopefully will aid the immune system too. igreat ingredients. didn't expect such quck response and after and hour- two after taking
iHerb customer
Posted on Apr 6, 2025
Australia
381
0
0
215
Zymactive Makes a Difference
Verified purchase
I love how Zymactive helps ease my joint pain and inflammation! Taking it around meal times works wonders. Also, my restless legs are much calmer now – just one day and I felt the change. Natural Factors really knows their stuff with high-quality ingredients that keep me feeling good without chemicals. My stomach doesn’t bother me at all thanks to the enzymes; they’re gentle yet effective. Plus, it even helps reduce scar tissue pain. Switched from another brand and haven't looked back – this one’s perfect for my needs!
Krystyna
Gold
Posted on Nov 26, 2024
Canada
466
0
2
134
excellent
Verified purchase
Natural Factors is my favorite company that always offers us proven, natural ingredients in their supplements and vitamins. And so it is in this case. All ingredients are perfectly selected to support the muscles and joints of our body - they work wonderfully. I also pay attention to the ingredients in: Other ingredients, so that they do not contain chemical additives
Ima
Posted on Dec 20, 2024
United Kingdom (UK)
10
0
2
6
Best Enzymes
Verified purchase
Used Natural Factors product before, but first time using those enzymes..they are really amazing, found them really working with my intolerance and the size just right
iHerb customer
Gold
Posted on Nov 15, 2024
New Zealand
1,171
0
5
160
Definitely works
Verified purchase
after researching for many weeks, I discovered proteolytic enzymes eat away fibrin ( scar tissue). these tablets have definitely helped in reducing pain from scar tissue.
iHerb customer
Posted on Aug 27, 2026
Hong Kong
81
0
2
7
Good
Verified purchase
I have ordered Zymactive from iHerb multiple times. These are enteric‑coated tablets, so the enzymes can pass through stomach acid and get absorbed in the intestines, which is critical for serrapeptase to work systemicallyNatural Fa.... I take this for joint stiffness and swelling after sports injuries. I usually take 1‑2 tablets on an empty stomach. After several days of consistent use, I noticed swollen areas feel less puffy, and my post‑workout muscle soreness eases much faster. It also helps with mild sinus congestion. Tablets are easy to swallow. No upset stomach for me. Free of gluten and artificial additives, which I really value. The 30‑count bottle is perfect for trial before buying the larger 90‑count size. Package arrived well sealed via iHerb fast shipping. If you bruise easily or deal with chronic mild inflammation, give this a try. Will keep repurchasing.
Gabo
Silver
Posted on Apr 20, 2025
Colombia
213
0
4
12
Keep coming back
Verified purchase
I had never tried this Canadian supplement brand before but I am quite pleased with the results and the high quality of the compounds. This enzyme combo is super helpful for joint pains, but it could aid digestion as well.
iHerb customer
Posted on Feb 13, 2023
Vietnam
3
6
0
7
Verified purchase
Zymactive Improves Bodily Function Across the Board with Enzymes While precisely targeted dietary supplements are useful for a host of reasons, whole body metabolic support can also help to boost your vitality, energy, and comfort. Natural Factors Zymactive Double Strength is a systemic enzyme supplement, helping boost and strengthen all the enzymatic processes that keep your body running like a well-tuned engine. This potent formula can aid in the correct functioning of multiple protein-based processes throughout your body, helping with detoxifying and cleansing your entire system, and fight inflammation while fortifying your immune system against illnesses and infections. It also promotes good digestion, helps to soothe aches and pains, and fights multiple health problems to assist you in feeling electrified, empowered, and full of pep.
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