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SOURCE (#10093)


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Product Overview

The ultimate micronutrient supplement

SOURCE is an extremely broad-spectrum horse supplement with at least 60 elements and their associated micronutrient compounds in a biologically active form. SOURCE contains small amounts of naturally occurring vitamins, including the 14 currently recognized "essential trace elements" and the 21 trace elements now under special consideration with respect to essentiality, plus other unidentified associative factors whose role in nutrition has not yet been established.

SOURCE contains a proprietary blend of pure dehydrated seaweed meals...and nothing else! All-natural, concentrated herbs of the ocean.

  • A unique proprietary blend of pure dehydrated seaweed meals
  • Includes at least 60 elements and their associated micronutrient compounds

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Key Ingredients


Supplement Facts

Ingredient Name Amount Per Serving
Ingredient Name Amount Per Pound

Ingredient Details


Weight Recommended Amount Loading Amount

How the Ingredients Work

Supporting Success

Supercharge Your Supplements

  • Simplify with SmartPaks | Consistent, Custom, Convenient
    We take the guesswork out of serving sizes, ensuring your horse gets the right amount, every time. SmartPaks have airtight seals to ensure that your horse always has the freshest supplements available. Your horse is unique and his supplements should be too. Choose from over 230 supplements to get everything he needs, nothing he doesn't. We print your horse's name on every Pak so there are no mix-ups, making feeding time fast, accurate and easy! Unlike most buckets, SmartPaks are made from recycled plastic and can be recycled again! We'll send your SmartPaks on time so you never run out, with total flexibility and no commitment. Plus all SmartPaks over $40 receive free ground shipping.


The reviews provided on this website represent the experience of the individual posting the review. We do not adopt, edit, or endorse any of the submissions posted within the reviews section. Rather, the reviews are part of an online community of animal owners that desire to share their particular experience with other individuals. These reviews are not a substitute for discussing the health of your animal with a veterinarian.

SmartPak customers are some of the most conscientious animal owners around. We encourage you to share your experience with the products we sell to help fellow customers to make informed choices for their animals. We do not edit these reviews in any way - they are direct customer-to-customer communication. We do monitor reviews for positive and negative feedback, and use this feedback to improve our selection as well as sharing feedback with product manufacturers to help them improve their products. Please note that we recommend consulting your vet with serious health issues.

SOURCE is rated 4.8 out of 5 by 153.
Rated 5 out of 5 by from Has a great reputation. I’ve heard so many good things about Source over the years. Figured it was so economical I would put my older gelding and my young mare on it. It’s only been a month so far, so I haven’t noticed anything huge yet but I feel it’s very good for them based on other reviews and word of mouth. Also make sure you follow the directions and start off with a tiny bit per day and increase slowly up to the recommended daily dose! This was your horse will get used to the taste slowly and won’t turn their noses up at it. I did that and I had no issues with them eating it. And my mare is extremely picky.
Date published: 2018-02-06
Rated 5 out of 5 by from Instant results Immediately noticed a change in my mares personality
Date published: 2017-12-11
Rated 5 out of 5 by from No more wood chewing! I started both my boys on this about 2 months ago. The look better than ever! I love having a natural source of minerals that they can digest. I'm I a seaweed extract and so is my dog. Best supplement to be on. I know they everyone is getting their electrolytes too. As a happy bonus, no more wood chewing. Even my chronic beaver stopped completely. No issues eating it in grain or tossed on top of hay.
Date published: 2017-11-10
Rated 5 out of 5 by from Makes such a difference!! We have our horses on Source and the hoof growth and coat condition is amazing!!!
Date published: 2017-09-28
Rated 5 out of 5 by from Great! I have been using this product now for one year and our horse hooves haven’t looked so good in a long time.
Date published: 2017-09-26
Rated 5 out of 5 by from Good product! I like the idea that my horses are getting their extra boost of enzymes and nutrients from ocean derived sources. The reviews of this product are very good. I have not used this product long enough to see results in my horses. I am expecting them to thrive on this product.
Date published: 2017-08-22
Rated 5 out of 5 by from Great overall supplement I've had my horse for 5 years and he's been taking Source daily. It was recommended to me by another experienced horse owner so I tried it. He's healthy, shiny, and farrier says his hooves are always in great shape.
Date published: 2017-07-27
Rated 5 out of 5 by from Relieves Hives? It was suggested by a trainer that I try a seaweed based supplement to help relieve hives that my horse developed this spring. I did some research and seaweed based products are quite popular in Europe to encourage good hair and hoof growth. Not as easily found here in the U.S. it was good to see that SmartPak offered a seaweed based product. The main mineral in seaweed known to encourage this is iodine. While I am not sure if giving my horse Source alleviated her hives, they have disappeared and I have noticed a benefit to her hooves and coat. She is shiny, dappling and her hooves are strong.
Date published: 2017-05-22
Rated 5 out of 5 by from great product I like this product especially with our stalled horses lacking pasture
Date published: 2017-04-11
Rated 5 out of 5 by from The source for Source I've been buying Source from Santa Cruz for a year. Great service and wonderful product.
Date published: 2017-03-29
Rated 5 out of 5 by from Saved my trees. I've been very happy with this product in that all my horses eat it readily and it has satisfied their mineral needs and stopped them from chewing on trees.
Date published: 2017-03-14
Rated 5 out of 5 by from Very Happy I have always been pleased with my orders from Santa Cruz and this was no exception. I had need to call customer service to amend an order and they were so friendly and helpful.
Date published: 2017-01-31
Rated 5 out of 5 by from Great stuff at an unbelievably low cost per day! Source has been an integral part of my feed program for my three horses for years and I'd never be caught without it. Hooves are hard and grow smooth and fast. Not a single horse I've fed it has needed shoes for any reason. Coats are deeply pigmented with shine and dapples. My herd has been so healthy we have only had the vet out for routine vacations for the past 8 years! My 19yr old mare has never looked or felt better and she's constantly putting much younger horses to shame.
Date published: 2017-01-12
Rated 4 out of 5 by from Great Source of Iodine I've been using half a scoop of SOURCE to make sure he was getting enough iodine. Though this product doesn't smell that great (unless you love the smell of seaweed), my picky horse will eat it just fine in grain as you don't have to feed that much of it. Their 1 oz is very small, and he will lick his bowl clean even with SOURCE in it; however, he definitely hesitated the first time I gave him an ounce of it in half a pound of his favorite rice bran. Though I didn't get this product for my TB's feet (he had pretty good-conditioned hooves before staring SOURCE), they do look really good right now after using half an ounce of SOURCE for about 4 months.
Date published: 2016-12-18
Rated 5 out of 5 by from Great product Great mineral supplement, best price and supper fast shipping
Date published: 2016-11-03
Rated 5 out of 5 by from Great product I used source as just an added product to make sure my horse with diet restriction was getting everything he needed. Added bonus was my tbs feet have never been better. I noticed a huge diffrence when I took him off source for a few months. This works better for him and his hoofs then any other product I have tried.
Date published: 2016-09-26
Rated 4 out of 5 by from So far so good I have only been using this product for a month and I already notice an improvement in my horses' coats. More time will tell if there is a marked improvement in their hooves, but it does seem that surface cracks are growing out.
Date published: 2016-08-17
Rated 5 out of 5 by from GREAT service The product is great have used it for years but it was the quick service from Santa Cruz that made the difference. Thanks so much
Date published: 2016-06-29
Rated 5 out of 5 by from Long time Source user We have had horses for over 40 years. Started using Source in the mid eighties, I believe. Mainly for improved hoof quality, and also for better nutrient utilization. Sometime last winter we ran out for a few months, and Bob started going to pieces. After Spring shots, checkups, and some dental work, he is doing better, now; regaining weight and we hope his feet grow out with less chipping. Since we had started Pete on "Bug Off" earlier for his insect allergies, we decided to go with Smart Pak for their Source, as well. So far, so good. FYI both horses are in their twenties.
Date published: 2016-06-19
Rated 5 out of 5 by from My secret... People have always commented on how shiny and healthy my horse looks. Every farrier I have had has commented on the growth and hardness of his hooves. He's never needed shoes. Of course, this could be a genetic trait but I think it comes down to a little of that, good hay, clean water, an appropriate amount of salt, regular deworming, and source. You gotta work from the inside out. Our soils are becoming more and more deficient in micronutrients which is why we must supplement in certain areas. I even carry this over to my own life and try to eat only organic foods which are better for the environment and my body. I try to get blood work done for my horse regularly and fill in gaps with more specific vitamins/minerals, like I do for myself, but in the interim I find this supplement seems to cover all the bases my horse needs. I've even used it on rescue horses in the past and they've all benefited from it. From OTTB's, quarter horses, Appaloosas, paints, and Arabs ranging from the ages of 4 to 30. Most got only that, not even needing a multivitamin. To top it off, this supplement is such a good deal. If you buy the cheap, small bucket, you get a 5 month supply and it doesn't need to be refrigerated. This is the one thing I've always recommended to first time horses owners. I'm glad my mom started me on this as a kid. I'll stick with this for any horses I own in the future.
Date published: 2016-06-17
Rated 5 out of 5 by from Order it regularly It really helps with growing out foot cracks and dappled coats
Date published: 2016-04-26
Rated 5 out of 5 by from Awesome sauce! I started my 27 year old TB on this a year ago when he kept suffering from recurrent rain rot. No more rain rot! Source also gave him a super soft, shiny, and healthy coat! He's shedding well this spring, and the hair underneath is beautiful! Both the powder and nuggets work well - it's up to you how you want to give it to your horse.
Date published: 2016-04-24
Rated 5 out of 5 by from Great product Use this product for years. Hooves are great with no cracks
Date published: 2016-03-15
Rated 3 out of 5 by from Health and well being I have been providing source to my horses for 9 months. They look and feel the best since they've been with me over the past 8 years and my mare is nursing
Date published: 2015-12-02
Rated 5 out of 5 by from Is great My rescue mare's coat changed from a burnt sorrel color to a liver chestnut after about a month using Source.
Date published: 2015-10-29
Rated 5 out of 5 by from This works as a great all around supplement for my horses. I gives them nice shiny coats and an overall healthy glow
Date published: 2015-08-13
Rated 5 out of 5 by from so far so good... I can't say I've seen drastic improvements yet but I have high hopes. Started this supplement about 1 month ago. I'm really hoping for better skin coats and stronger hooves. I will update this review in several months...
Date published: 2015-07-28
Rated 5 out of 5 by from Good stuff! have been buying this for 6+ years, it provides a great natural source of often missing nutrients. I try to NEVER run out it helps my horse look & feel their best
Date published: 2015-07-08
Rated 5 out of 5 by from Don't knock it til you try it I've used Source for probably 20 years. It's just a good all around product. We give it to our brood mares and breeding stallions. I've used it on my riding geldings as well. I ride my horses barefoot. The Source toughens up the feet. I have to trim 2-3 times a year. My horses ride in all terrain, and have no problems. Good supplement for anything from foot problems, GI issues, and joint problems. You must feed for several months before you see results. It does work!
Date published: 2015-03-16
Rated 5 out of 5 by from Won't go without Source! I purchased an OTTB gelding in December. He retired from the track in September and had some down time before I got him. He was shipped up from KY to ME and was a rack of bones. His coat was long and gross, and he had some sort if fungus on his neck. I started him on source immediately and his weight has picked up, he is gaining muscle, and his coat is shiny and beautiful! I can't wait to see how he looks by summer. He so g go without Source.
Date published: 2015-02-07
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