SKU: 80158331100

OPC Synergy®, 40 Capsules

Sale price$49.68 Regular price$55.20
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Description

OPC Synergy®, 40 CapsulesOPC Synergy provides a synergistic blend that exhibits antioxidant activity and supports cell functioning.* Provides ingredients with antioxidant activity* Supports and maintains normal cell function* Helps maintain normal cognitive function* Supports eye health* Supports the complex processes associated with aging* Supports a healthy cardiovascular system* Maintains capillary integrity* Frequently Asked Questions What is new with OPC Synergy? Due to

OPC Synergy provides a synergistic blend that exhibits antioxidant activity and supports cell functioning.*
  • Provides ingredients with antioxidant activity*
  • Supports and maintains normal cell function*
  • Helps maintain normal cognitive function*
  • Supports eye health*
  • Supports the complex processes associated with aging*
  • Supports a healthy cardiovascular system*
  • Maintains capillary integrity*


Frequently Asked Questions

What is new with OPC Synergy®?

Due to sourcing issues, Standard Process has secured a new supplier for the grape extract in OPC Synergy®. This new source comes from the wine-making process in France and contains added sulfites.

Where do sulfites come from?

Small amounts of sulfites are naturally occurring in some foods including apples, rice, onions, and cabbage.1 They are also used as a food additive to increase shelf-life or to halt fermentation.

Why are sulfites listed on the label of OPC Synergy®?

Some individuals can be sensitive to sulfites, resulting in reactions such as hives, asthma, or anaphylaxis. Products containing added sulfites must be labeled as such if sulfites exceed 10 parts per million.2

If someone is allergic to sulpha drugs, will they have a reaction to sulfites?

Not necessarily, these are two separate allergies with no direct connection to each other. Sulfites are different than sulpha drugs, antibiotics, and other medication that contain a sulfonamide molecule.


More Information

For more information, please contact the Standard Process Quality Control Help Desk at: Phone: 800-848-5061 ext. 4200 ׀ Email: [email protected]


Cited References:

1. European Food Safety Authority. 24 Nov 2022. Sulfites: safety concern for high consumers, but data lacking | EFSA

2. US Food and Drug Administration. Code of Federal Regulations. Title 21, Vol 2, 21CFR130.9 CFR - Code of Federal Regulations Title 21


Suggested Use:

One capsule per day, or as directed.

Warning: Keep out of reach of children.


Nutrients & Ingredients

Each Serving Size (1 Capsule) contains: Proprietary Blend 410 mg: Organic buckwheat (aerial parts) juice powder, organic buckwheat (aerial parts), green tea (leaf) powder, organic carrot, grape seed extract, bilberry (fruit) extract, green tea (leaf) extract, and grape extract. Other Ingredients: Gelatin, water, and calcium stearate. Contains: Sulfites.


Please consult the actual product label for the most accurate product information.

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

Shipping Notes
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Exchange/Return Notes
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SKU: 80158331100

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4.9 ★★★★★
Based on 1826 reviews
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K
Verified Purchase
Kelli Thornburg
Massapequa, US
★★★★★ 5
Puppy loves these sticks!
Color: Dogwood & Calming, Size: Medium
Dogs love these sticks! Must smell and taste like real wood because it keeps my puppy from bringing real sticks in the house from outside. She is a heavy chewer and these sticks keep her occupied. We are on our 2nd set.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
C
Verified Purchase
C. H.
Carnegie, US
★★★★★ 5
Great value for the price, highly recommend
Color: Dogwood & Calming, Size: Medium
Our dog loves these and chews them down to nothing. They are a great value for the money and the use your dog gets out of them. The size is just right for our doberdor.
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Reviewed in the United States on May 20, 2026
L
Verified Purchase
LC
Grantham, US
★★★★★ 3
Our dog loves it but it wasn’t durable enough to last
Color: Dogwood Jack, Size: Large, Color: Dogwood Jack, Size: Large
Our lab took to it as soon as we gave it to her. Perfect size for our 80 lb yellow lab. However, now that it’s in about 10 days, she’s able to break off chunks from this bone that are dime size or larger, and we have to throw it away
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Reviewed in the United States on May 1, 2026
M
Verified Purchase
Matthew Anderson
Pawtucket, US
★★★★★ 5
No problems after a year and a half
Color: Dogwood & Calming, Size: Medium
Have been regularly buying these for my corgi for about a year and a half. The 2 pack lasts about a month or 2 each time. Pieces break off in small enough pieces that they safely pass through his digestive system. He gnaws each one down to about 1/4 the original size before we take it away and give him a new one. He continues to have regular bowel movements and has a healthy appetite so I can’t imagine any problems arising after so long. I have tried other alternatives and every other similar chew breaks off in larger pieces and didn’t feel comfortable letting him chew/eat them. I noticed there are a few 1 star reviews saying their dogs got sick off these but after a year and a half I have had 0 issues with this product. I guess it depends on the dog and how big of pieces they are swallowing. My dog ingests pieces about the size of a grain of rice so just pay attention and you should be fine.
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Reviewed in the United States on February 18, 2026
T
Verified Purchase
terlynn4
Natrona Heights, US
★★★★★ 5
Long lasting and safer alternative to sticks
Color: Dogwood & Calming, Size: Medium
These are great, very durable, and have lasted a very long time. Much safer for my dogs than the random sticks they find in the yard. They do get shorter with chewing eventually, but they don't break off in little chunks like I've seen with some nylon chews, and they don't splinter like wood. Medium size works well for both my 16 lb Cavalier and my 60 lb Pyrenees/Golden mix. They're both moderate-to-aggressive chewers, though size obviously affects how much damage they can do. I wish you could buy the hemp chew separately because that one is very much a favorite in my house, so after 2 years and 2 purchases, I have barely any left of the remaining hemp chew, but still 2 of the dogwood chews that neither dog is as interested in anymore. I'd love to buy a couple more of just the hemp one.
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Reviewed in the United States on April 30, 2026

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