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Opti Muscle™

Support for hard working or vulnerable muscles

Independent Feedback based on 18 verified reviews. 4.8 / 5

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Nutrition Information

Opti Muscle™ supports muscle health by providing Vitamin E, Selenium, Magnesium and B Vitamins that are essential for optimum nerve and muscle function.

Vitamin E and Selenium are important nutrients that act as antioxidants, which play an important role in maintaining healthy cell membranes and normal muscle function. Magnesium supports nerve function and muscle relaxation, allowing horses and ponies to work with greater flexibility. Additionally, B vitamins are essential for the formation of coenzymes and enzymes necessary for cell metabolism, helping your horse or pony to utilise energy sources effectively. Helping to keep cells healthy whilst supporting optimum metabolism will help to maintain muscles in a healthy condition and will aid horses and ponies to work more effectively and promote correct muscle development.


Grass meal, Maize meal, Magnesium oxide (4.4%).


TECHNOLOGICAL ADDITIVES (perkg): BHT antioxidant (Butylated hydroxytoluene, E321) 0.3g.

NUTRITIONAL ADDITIVES (per kg): Vitamin D3 (Cholecalciferol, 3a671) 200iu; Vitamin K3 (Menadione sodium bisulphate, 3a710) 300mg; Vitamin B1 (Thiamine hydrochloride, 3a820) 1,499mg; Vitamin B2 (Riboflavin, 3a825i/3a825ii) 899mg; Vitamin B6 (Pyridoxine hydrochloride, 3a831) 899mg; Vitamin B12 (Cyanocobalamin) 9mg; Biotin (3a880) 30mg; Niacin (3a314) 200mg; Folic acid (3a316) 599mg; Calcium pantothenate (3a841) 1798mg; Choline chloride (3a890) 2997mg; Vitamin E (all rac-α-tocopheryl acetate, 3a700) 54,803iu; Selenium (Sodium selenite, 3b801) 37mg.


Crude protein 11.7%, Crude oils & fats 7.9%, Crude fibre 18.2%, Crude ash 15.5%, Acid insoluble ash 6.11%, Starch 16.2%, Sugars 8.4%, Sodium 0.16%

Feeding Guide

Weight of Horse/Pony

Amount per day

Maintenance / Light work  

Amount per day      

Medium work             

Amount per day

Hard work                      

Up to 250kg ½ scoop ¾ scoop 1 scoop
250kg - 400kg ¾ scoop 1 scoop 1 ½ scoops
400kg - 600kg 1 scoop 1 ½ scoops 2 scoops
Over 600kg 1¼ scoops 2 scoops 2 ½ scoops


1 level (50ml) scoop of Opti Muscle™ weighs approximately 20.5g/0.7oz.

Horse Workload Guide

  • Maintenance/light work: light hacking 1-3 times per week, light schooling, occasional competitions
  • Medium work: 30-60 minute schooling sessions or 1-2 hour hacks daily, riding club competitions
  • Hard work: extensive schooling sessions, regular endurance, dressage or showjumping competitions

Horses experiencing episodes of tight, sore muscles can be fed Opti Muscle™ at the hard work rate for up to 2 weeks.

If you are unsure about your horse's workload please call 0800585525 to speak to an advisor.

Feed supplements should be fed according to body weight. Introduce to the horses diet gradually, splitting between feeds (when applicable).

Opti Muscle™ is a complementary feeding stuff for equine animals. Feedmark uses nothing in the formulation of this product that contravenes competition rules.