Source 2015 Supplement

Source 2015 senior horse supplement is featured on InfoHorse.com's senior supplements page. The banner above links to the full product details and ordering information on the manufacturer's site. For complete product specifications, dosage guidance, and ingredient details, follow the banner link or contact the manufacturer directly.

---

What exactly is the SOURCE senior supplement for older horses?

The senior offering in the SOURCE® line is Focus SR (Senior), a daily micronutrient supplement built specifically for the aging horse whose metabolic and immune systems have grown less efficient with time. At its core is a full daily serving of SOURCE® micronutrients concentrated from cold-water ocean seaweeds, layered with Omega fatty acids, antioxidants, vitamins, beneficial microbes, chelated minerals, nutritional yeast culture and digestive enzymes. It is designed to be fed alongside a normal senior feed program, supporting digestion, metabolic efficiency, weight maintenance and overall vitality rather than replacing forage or hard feed.

Who makes SOURCE, and why does that pedigree matter?
SOURCE was founded in 1975 by Susan Domizi after a seaweed-based blend transformed her own eventing horse's hooves and condition, and 2025 marks the company's 50th anniversary of delivering equine micronutrients. The manufacturer, SOURCE INC. / SOURCE Micronutrients LLC, operates from 7 Industrial Parkway, Brunswick, Maine 04011, and can be reached at or. SOURCE is recognized as the pioneer of equine micronutrient supplementation, was the first horse supplement to offer a no-questions-asked money-back guarantee, and is a proud founding member of the National Animal Supplement Council (NASC).

What is actually in Focus SR (Senior)?

The full ingredient panel lists dehydrated seaweed meals, flax, yeast culture, Enterococcus faecium, Lactobacillus acidophilus, Aspergillus niger, Trichoderma longibrachiatum and Bacillus subtilis fermentation extracts, ground extruded soybeans, dehydrated alfalfa meal, corn distillers dried grains with solubles, zinc proteinate, manganese proteinate, ascorbic acid (Vitamin C), copper proteinate, pyridoxine hydrochloride (Vitamin B-6) and natural flavoring. A daily serving supplies 9 mg of naturally occurring organic iodine. The product contains no artificial colors, flavoring, preservatives, synthetics or drugs.

How does the seaweed-based SOURCE micronutrient core work?

The SOURCE micronutrient base is a proprietary blend of pure dehydrated seaweed meals harvested from select cold-water seaweed varieties, delivering at least 60 elements and their associated micronutrient compounds in a biologically active form. This spectrum includes naturally occurring vitamins, the 14 recognized "essential trace elements," the 21 trace elements still under consideration for essentiality, plus other associative factors whose nutritional roles are not yet fully established. The premise is that even rations with adequate protein, vitamins and major minerals can leave subtle micronutrient gaps, and that filling them helps the body better use everything else in the diet.

How is Focus SR fed, and how long does a container last?
Feeding is simple: mix one level measure (included in the container), equal to 1.5 oz. (42 g) of Focus SR, with feed per day for a 1,000-lb horse, adjusting for body weight. The makers caution against exceeding the recommended level to avoid iodine overdose, since iodine is the one nutrient that must be carefully evaluated when balancing feed rations. The 3.5-lb bucket lasts one horse 37 days, while the economical 25-lb easy-open container lasts a single horse about 8 months.

How do you buy it, and what does it cost?
Focus SR (Senior) is sold directly through the manufacturer at sourcemicronutrients.com (and the legacy 4source.com), with the 3.5-lb bucket listed at $40.25 and the 25-lb container at $229.50 (range $40.25 – $229.53). It is also widely stocked by equine retailers such as Chewy, SmartPak, Valley Vet Supply, Jeffers and PBS Animal Health. Every purchase is backed by SOURCE's standing guarantee of a full refund with proof of purchase if you are unsatisfied, with no time limit, and you can call for ordering or dosing guidance.