Vetpro Vitamin B1 Thiamine
- Regular price
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$39.79 - Regular price
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- Sale price
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$39.79
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B Vitamins are generally created in the gut of the horse by its own physiology, and under normal circumstances are not required to be supplemented. However this internal manufacture can be disrupted when the horse is on a high carbohydrate and/or low fibre diet, or stressed by – travel – performance pressure – change of environment – or by illness. Signs of low Thiamine can be distracted, spooky behaviour, edgy and difficult manner.
Research has shown that B Vitamins and particularly Thiamine, can be insufficiently made in the gut and therefore lower in supply and so many horses may need supplementation, especially if access to good pasture is not available.
Thiamine is required in higher amounts when carbohydrates are the main source of energy, for example racehorses and high-performance horses, plus often these horses are not on full time quality pasture. Spookiness and nervous type energy is often blamed on carbohydrate intake, (but in fact carbohydrates just create energy) but more often it is the lowered thiamine levels.
Often this type of behaviour is attributed to low magnesium levels, even though a natural diet with a small feed usually provides sufficient magnesium. Many feeds and additives contain Organic or chelated Magnesium, which is not water soluble, and so it can be overdosed to a toxic level with negative effects to the horse. Magnesium oxide is water soluble but is inorganic but less popular (there is a trend for organic), and so safer for the horse.
Recommended Daily Dose:
Average Horse 500Kg – 15gm – one level scoop
Average Pony 14HH – 7-8gm – half scoop
The product is soluble so can be dissolved in water for easy administration.
Pack Sizes & Daily Cost (based on a 500kg horse):
- 500g: 33 days supply at $1.21 per day*
- 1kg: 67 days supply at $1.03 per day*
- 2.5kg: 167 days supply at $0.90 per day*
*Based on approx. pricing and dosage, subject to change.
NOTE:
Reseal the pouch after use to keep contents dry as the product will pick up moisture. Store in cool dry conditions.
Available sizes: 500gm, 1kg and 2.5kg pouches.
Shipping Info
Shipping & Pickup Information
Flat Rate Shipping via Post Haste (Excludes Feed):
- North Island: $10 (1-2 working days)
- South Island: $20 (2-3 working days)
- Rural Surcharge: +$6 (extra time may apply)
Feed Shipping per bag via Post Haste:
- Central North Island: $14 Per Bag
- Upper North Island: $18 Per Bag
- Lower North Island: $28 Per Bag
- South Island: $55 Per Bag
- Rural Surcharge: +$6 (extra time may apply)
Orders placed before 1 PM are usually shipped the same day.
Pick-up Info
Click & Collect - Tauranga Store
Free 24/7 pickup from our secure after-hours collection box. Email us if you’d like to collect after hours and we’ll send you the instructions.
Try Before You Buy - No Obligation
We keep limited stock in-store, so order online to secure the items you want to try.
At checkout, choose Click & Collect as your delivery method, then Cash on Delivery (COD) as your payment method. You won’t pay anything online.
We’ll bring your items into the store and let you know when they’re ready. Try them on or check them over in person. If they’re not right, leave them with us. No problem at all. If you keep them, pay in store when you pick up.
Excludes saddles.
Returns & Exchanges
No problem! We offer 30-day returns and exchanges on items in new, resalable condition with original packaging. Returns are issued a full store credit, or a refund less a 10% processing & restocking fee. See our full policy.
FAQ
All your questions, answered.


Not sure what rug your horse needs right now? Our free Horse Rug Forecaster checks your local weather and tells you what rug weight your horse needs today, tonight and over the next 3 days. It works anywhere in New Zealand and adjusts for clipped horses and horses that feel the cold.
The thermoneutral zone is the temperature range where the body can maintain its core temperature with little to no extra energy expenditure. Humans need it much warmer, at around 25–30 °C, but for horses it’s much broader at 5–25 °C.
This difference means we should avoid rugging horses based on how cold we feel. Over-rugging can lead to serious health issues, including metabolic problems and thermoregulatory dysfunction.
Tips for Choosing a Winter Rug Weight
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Clipped horses may need a heavier gram fill to stay comfortable.
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Remember: horses warm themselves more easily than they cool down under a rug. If unsure, choose a lighter rug.
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Check your horse regularly to make sure they are neither too hot nor too cold.
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Consider your horse’s age and natural ability to stay warm.
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As a general guide, a healthy unclipped horse with shelter usually doesn't need a winter rug until it feels colder than about 5 °C, but always adjust for your horse’s individual needs.
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Always ensure rugs are waterproof. A wet rug is worse than no rug at all.
This is an indicative guide only. Always take into account factors such as wind chill, your horse’s age, weight, and condition. For advice based on your local forecast, try the Horse Rug Forecaster.

