Last update
5/6/2026
Reviewed By
Overview
SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
USERS' SCORE
Good
Based on 13 Reviews
8
Supplement Facts
Serving Size: 3 Capsules
Serving Per Container: 120
Amount Per Serving
%DV
MSM (Methylsulfonylmethane) (OptiMSM®)
3,000 mg
†
Top Medical Research Studies
9
We aimed to understand how methylsulfonylmethane (MSM) impacts symptoms of allergic rhinitis through a well-structured randomized, double-blind study.
Participants, who were prone to allergic responses, were tested after taking varying doses of MSM following allergen exposure.
Interestingly, the results showed that MSM significantly eased nasal symptoms and improved airflow, making it a potential alternative to conventional allergy medications.
We’re excited by the findings, as MSM appeared effective without common side effects associated with typical treatments.
Participants, who were prone to allergic responses, were tested after taking varying doses of MSM following allergen exposure.
Interestingly, the results showed that MSM significantly eased nasal symptoms and improved airflow, making it a potential alternative to conventional allergy medications.
We’re excited by the findings, as MSM appeared effective without common side effects associated with typical treatments.
Read More
Most Useful Reviews
9
Effective relief
5 people found this helpful
This product effectively soothes my skin allergies; I genuinely like it!
Read More
9
Overall wellness boost
5 people found this helpful
This has greatly assisted with my allergies and overall well-being. I think my skin has improved too. It's the only supplement I ensure I take daily. I’m reordering immediately since I have about three days’ worth left!
Read More
10
Fantastic results
2 people found this helpful
It works perfectly for my seasonal allergies! The results are gorgeous! It also alleviates my pollen allergy symptoms, which is fantastic. Many friends of mine are already using it. I can't understand why there aren't more reviews from allergy sufferers, as this product is truly indispensable!
Read More
Medical Researches
SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
- All Researches
9
We aimed to understand how methylsulfonylmethane (MSM) impacts symptoms of allergic rhinitis through a well-structured randomized, double-blind study.
Participants, who were prone to allergic responses, were tested after taking varying doses of MSM following allergen exposure.
Interestingly, the results showed that MSM significantly eased nasal symptoms and improved airflow, making it a potential alternative to conventional allergy medications.
We’re excited by the findings, as MSM appeared effective without common side effects associated with typical treatments.
Participants, who were prone to allergic responses, were tested after taking varying doses of MSM following allergen exposure.
Interestingly, the results showed that MSM significantly eased nasal symptoms and improved airflow, making it a potential alternative to conventional allergy medications.
We’re excited by the findings, as MSM appeared effective without common side effects associated with typical treatments.
Read More
User Reviews
USERS' SCORE
Good
Based on 13 Reviews
8
- All Reviews
- Positive Reviews
- Negative Reviews
9
Effective relief
5 people found this helpful
This product effectively soothes my skin allergies; I genuinely like it!
Read More
9
Overall wellness boost
5 people found this helpful
This has greatly assisted with my allergies and overall well-being. I think my skin has improved too. It's the only supplement I ensure I take daily. I’m reordering immediately since I have about three days’ worth left!
Read More
10
Fantastic results
2 people found this helpful
It works perfectly for my seasonal allergies! The results are gorgeous! It also alleviates my pollen allergy symptoms, which is fantastic. Many friends of mine are already using it. I can't understand why there aren't more reviews from allergy sufferers, as this product is truly indispensable!
Read More
9
Great for allergies
We have been using this product alongside Quercetin and Vitamin C for years to assist with allergies. It has proven to be highly effective, and Iherb's delivery service is impressively quick.
Read More
7.5
Reduced symptoms
26 people found this helpful
My son has suffered from rhinitis for years, often with a persistent runny nose. Despite numerous allergy medications proving ineffective, after giving him 1000mg of MSM twice daily for two weeks, I noticed significant improvement. Within days, his symptoms lessened, and he woke up less congested. I also started taking it and felt its effects as well.
Read More
Frequently Asked Questions
7.5
Reduced symptoms
26 people found this helpful
My son has suffered from rhinitis for years, often with a persistent runny nose. Despite numerous allergy medications proving ineffective, after giving him 1000mg of MSM twice daily for two weeks, I noticed significant improvement. Within days, his symptoms lessened, and he woke up less congested. I also started taking it and felt its effects as well.
9
Helpful during allergy season
The shape of this sulphur supplement is effective. It works well during allergy season, and the jar lasts for several courses of treatment.
9
Great for allergies
We have been using this product alongside Quercetin and Vitamin C for years to assist with allergies. It has proven to be highly effective, and Iherb's delivery service is impressively quick.
10
Fantastic results
2 people found this helpful
It works perfectly for my seasonal allergies! The results are gorgeous! It also alleviates my pollen allergy symptoms, which is fantastic. Many friends of mine are already using it. I can't understand why there aren't more reviews from allergy sufferers, as this product is truly indispensable!
9
Skin allergy relief
6 people found this helpful
This is excellent! MSM effectively alleviates my skin allergy from nuts. I take two capsules in the morning and one before bed.
9
Effective relief
5 people found this helpful
This product effectively soothes my skin allergies; I genuinely like it!
9
We aimed to understand how methylsulfonylmethane (MSM) impacts symptoms of allergic rhinitis through a well-structured randomized, double-blind study.
Participants, who were prone to allergic responses, were tested after taking varying doses of MSM following allergen exposure.
Interestingly, the results showed that MSM significantly eased nasal symptoms and improved airflow, making it a potential alternative to conventional allergy medications.
We’re excited by the findings, as MSM appeared effective without common side effects associated with typical treatments.
Participants, who were prone to allergic responses, were tested after taking varying doses of MSM following allergen exposure.
Interestingly, the results showed that MSM significantly eased nasal symptoms and improved airflow, making it a potential alternative to conventional allergy medications.
We’re excited by the findings, as MSM appeared effective without common side effects associated with typical treatments.
References
- Hewlings S, Kalman DS. Evaluating the Impacts of Methylsulfonylmethane on Allergic Rhinitis After a Standard Allergen Challenge: Randomized Double-Blind Exploratory Study. JMIR Res Protoc. 2018;7:e11139. 10.2196/11139
