Synopet Flex-Dog

Synopet Flex-Dog


For dogs tendons and muscles.

  • Omega 3
  • Calcium
  • Magnesium
  • Vitamin D3
  • GLMax® Green-lipped mussel
  • New customer? Advice: give the prescribed amount for 40 days (as a boost for your dog)
  • Same day dispatch if ordered before 3pm

6 in stock

Flex-Dog | boost for tendons & muscles

For flexible tendons & muscles in dogs

For all dogs | all races | big or small | young or old

Flex-Dog is a boost for tendons and muscles of dogs. It supports flexibility. Dogs like to play, run a lot, jump in the air, stop abruptly or suddenly make a small turn. Too tight or too loose tendons and muscles can lead to (long-term) injuries in a dog. Flex-Dog can be used when an injury has occurred, but preventive application is also possible. The main ingredients of this liquid boost are Calcium, Magnesium, Vitamin D3 and GLMax® Green-lipped mussel. The product also contains Fish Oil, Soybean Oil, Zinc and Vitamin C.

Important information:


Once or twice a year is generally sufficient to keep the tendons and muscles in good condition.


It is often visible within the useful life.


Better absorbable by the body and easier to administer.

Premium quality

Composed with natural, unique ingredients.

Ingredients of Synopet Flex-Dog (food supplement for dogs):


Fish oil, Soybean oil, GLMax® Green-lipped mussel (Perna canaliculus), Calcium gluconate, Magnesium citrate

Additives per kg dry matter

Nutritional additives

Vitamin C (3a300): 16,911 mg, Vitamin D3 (3a671): 5,236 IU, Zinc (Zinc chelate of methionine (3b611)): 654 mg

Technological additives

Preservatives: Potassium Sorbate (E202), Lactic Acid (E270), Citric Acid (E330), Calcium Acetate (E263) Antioxidant: Calcium Ascorbate (1b302)

Analytical constituents

Crude protein: 2.1%, Crude fat: 26.9%, Crude fiber: <0.4%, Crude ash: 2.45%, Moisture content: 61.8%, Calcium:> 5%, Sodium and Phosphorus:> 2% Contains Calcium, Magnesium and Vitamin D3 to support flexible tendons and muscles

Additional information about the main ingredients:


good for the bones, combined with Vitamin D3 for better absorbtion


for the proper functioning of muscles and for the formation of bones and muscles

Vitamin D3

plays a role in the maintenance of strong and flexible muscles

Omega 3

fatty acids are good for the blood vessels and therefore for blood flow to tendons and muscles

GLMax® Green-lipped mussel

(Perna canaliculus) 100% pure Green-lipped mussel, cold pressed, liquid, contains all original ingredients

Instructions for using Synopet Flex-Dog

For dogs up to 20 kg | Flex-Dog 200 ml:

  • dosage for dogs up to 20 kg: 5 ml
  • 1 x per day over the food
  • contains handy dosing syringe
  • Duration of use: 40 days (1 bottle)

For dogs over 20 kg | Flex-Dog 200 ml:

  • dosage for dogs 20 kg and over: 10 ml
  • 1 x per day over the food
  • contains handy dosing syringe
  • Duration of use: 40 days (2 bottles)

Additional information on use:

  • Adhere to the recommended operating time
  • Double the amount may be given for 10 days in severe cases
  • Results visible within period of use
  • A boost once or twice a year
  • No continuous use required

Explanation continuous use:

Continuous use is not necessary, but is allowed. Synopet Flex-Dog is also completely safe to use during continuous feeding.

Erik, owner of Nina

Our young Malinois is very playful, sometimes a bit too playful…. She is bursting with energy and really wants to work for us. That’s why we tried Flex-Dog. We found this to be a perfect support for a growing animal. Nina is still growing, and it gives us peace of mind that we are providing nutrition for her tendons and ligaments.