The best vitamin plan for a pregnant mare starts with a veterinarian’s review of her forage, feed, body condition, and stage of pregnancy—not a generic supplement. Of the listed products, Farnam Vita Plus is the broadest horse multivitamin, while Tocopherol provides vitamin E and Horse Health Vita B-12 targets vitamin B12. None is identified as specifically formulated for pregnant mares, so confirm suitability and dosage with your veterinarian. The two human supplements below are not appropriate substitutes for equine prenatal nutrition.
| Product | Best suited for | Important consideration |
|---|---|---|
| Farnam Vita Plus | Horses needing a broad vitamin-and-mineral supplement | Not labeled specifically for pregnancy |
| Tocopherol | Veterinarian-directed vitamin E supplementation | Confirm dose and administration method |
| Horse Health Vita B-12 | Targeted B12 supplementation when advised | Does not replace a complete ration |
| Mommy’s Bliss Postnatal Gummies | No equine use; human postnatal product | Do not give to a mare |
| One A Day Pre-Pregnancy Multivitamin | No equine use; human supplement | Do not give to a mare |
Farnam Vita Plus Horse Multivitamin

Best for: A mare whose veterinarian identifies gaps in her overall diet and recommends a broad equine vitamin-and-mineral supplement. It is the most comprehensive horse-specific option in this list because its description identifies multiple vitamins and minerals, including vitamin E and selenium.
The product is described as supporting overall health, antioxidant activity, and normal muscle function. Those features make it more relevant to general equine nutrition than a single-nutrient product. However, the listing does not state that it is formulated for gestation or provide pregnancy-specific feeding directions.
Limitation: Do not assume a general multivitamin is needed or that more is better. Ask a veterinarian to review the mare’s complete ration, especially before combining products that may contain overlapping nutrients.
Tocopherol Liquid Vitamin E

Best for: A horse owner whose veterinarian has recommended targeted vitamin E supplementation. The listed liquid supplies 500 IU of d-alpha-tocopherol per milliliter and is described as water-dispersible. The manufacturer’s listed administration options include top-dressing feed or mixing it into water or milk replacer.
Choose this if the goal is to address vitamin E specifically rather than add a broad multivitamin. The product description also emphasizes flexible administration, but it does not establish a dose for pregnant mares or confirm that every listed method is appropriate for a particular horse.
Limitation: Vitamin E needs and dosing depend on the horse’s diet and veterinary assessment. Do not use the stated concentration to calculate a mare’s dose without professional guidance.
Horse Health Vita B-12 Crumbles

Best for: A horse needing a veterinarian-directed source of vitamin B12. The listed features connect B12 with metabolism, red blood cell production, and nervous system function. This makes it a targeted supplement rather than an all-purpose prenatal vitamin.
It may be a better fit than a broad formula when a professional has identified a specific reason to supplement B12. The product information does not say that it prevents pregnancy complications, supports fetal development, or meets all nutritional needs during gestation.
Limitation: B12 crumbles cannot replace balanced feed, forage, or a complete vitamin-and-mineral plan. Use them only as directed by a veterinarian familiar with the mare.
Mommy’s Bliss Postnatal Gummies

Best for: This product is described for human postpartum recovery, not for pregnant mares. Its listed ingredients and intended benefits include collagen, biotin, and vitamin C for human hair, skin, and nail support, along with postpartum wellness claims.
It was included to clarify a common shopping distinction: a postnatal human gummy is not an equine prenatal supplement. Do not choose it for a mare based on the words “vitamins” or “postnatal” on the label.
Limitation: The product listing provides no equine use or dosing information. Do not give it to a horse.
One A Day Pre-Pregnancy Multivitamin

Best for: This is a human preconception supplement pack, not a product for horses. Its listed contents include a women’s prenatal multivitamin and a men’s pre-conception supplement. It is not an appropriate way to provide vitamins to a pregnant mare.
Including it here helps distinguish products aimed at human pregnancy from equine nutrition. A mare’s diet and supplement needs should be assessed using horse-specific feed information and veterinary advice.
Limitation: The listing does not provide equine formulation or horse dosing. Do not give this product to a mare.
Buying Guide: Choosing Vitamins for a Pregnant Mare
Does a pregnant mare need a vitamin supplement?
Not necessarily. Start by reviewing forage, concentrate feed, water, body condition, and the mare’s health with an equine veterinarian or nutrition professional. A supplement is most useful when it addresses a specific dietary gap. A label alone cannot show whether a mare’s full ration is balanced.
Should you choose a multivitamin or a single nutrient?
A broad product such as Farnam Vita Plus is intended to supply multiple vitamins and minerals. Tocopherol and B12 are targeted products for particular nutrients. The right choice depends on the ration and professional assessment. Avoid stacking products without checking for duplicated ingredients.
What should you check on the label?
- Confirm that the product is intended for horses and review its full ingredient and feeding information.
- Check the amount of each nutrient per serving, not just the product name or general claims.
- Ask whether the supplement is appropriate during the mare’s current stage of pregnancy.
- Do not use human prenatal or postnatal supplements as substitutes for equine products.
When should you ask a veterinarian?
Consult a veterinarian before starting, stopping, or combining supplements during pregnancy. Bring the feed and supplement labels and share the mare’s forage and feeding amounts. This helps the professional evaluate the complete diet rather than judging a vitamin product in isolation.
Frequently Asked Questions
What vitamins are best for pregnant mares?
There is no single best vitamin for every mare. The appropriate nutrients depend on the mare’s diet, condition, and veterinary evaluation. These listed equine products are not identified as pregnancy-specific formulas.
Can I give my mare a human prenatal vitamin?
No. The human prenatal product listed here is not formulated or dosed for horses. Ask an equine veterinarian for a horse-appropriate nutrition plan.
Is vitamin E useful for pregnant mares?
Vitamin E may be considered when a veterinarian identifies a dietary need. The listed tocopherol product provides vitamin E, but its description does not give a pregnancy-specific dose.
Does B12 replace a horse multivitamin?
No. B12 is a targeted nutrient and does not provide a complete range of vitamins and minerals. Use it only when appropriate for the mare’s diet and veterinary plan.
Can I combine a multivitamin and vitamin E?
Do not combine them automatically. The multivitamin listed includes vitamin E, so adding another source may duplicate nutrients. Have a veterinarian review the labels and total ration first.