Skip to content
PLEASE NOTE: You may experience errors on our site when using Internet Explorer. Please consider updating your browser, or download Google Chrome.

IN-SYNC 4™

1. Packaging/Size
2. Customization & Shipping Frequency
You'll love our AutoShip because it's:
  • Focused on healthy s, because consistency is key
  • Easy to snooze or cancel online, anytime
  • Totally flexible - edit your order as often as you'd like
  • Your VIP pass to FREE SmartPerks benefits
PLUS! You'll save % on every shipment if you order this product on AutoShip PLUS! You'll save % on every shipment if you order this product on AutoShip
We're bringing you this product at the lowest price allowed by the manufacturer so you won't find it cheaper anywhere else. This also means we can't apply any further discounts or promotions.
28 day supply
day supply
These are for:
Sign in to choose an existing

Choose AutoShip to become eligible to apply for the FREE Colicare Program after checkout.

  • This horse already has an existing AutoShip SmartPak. Please select the "AutoShip" checkbox or enter a different horse name.
Please call 1-800-461-8898 to order this product.
New ship same day!
These are for:
Sign in to choose an existing
  • This horse already has an existing AutoShip SmartPak. Please select the "AutoShip" checkbox or enter a different horse name.
-
+

FINAL SALE - This item cannot be returned or exchanged.

FINAL SALE - This item cannot be returned or exchanged.

Order within and
have it by
Shipping to
Add these items to your cart to get your estimated arrival date.
Shipping to
(AutoShip discount will be reflected in your cart)
28 day supply
day supply
These are for:
Sign in to choose an existing
These are for:
Sign in to choose an existing
Feeding Chart

Daily Serving

Dog Weight - lbs Inactive Dog Active Dog Working Dog
-
Inactive Dog - Less than 30 minutes of vigorous exercise daily
Active Dog - At least 30 minutes of vigorous exercise daily
Working Dog - More than two hours of vigorous exercise daily
This is only a guide. Please consult your veterinarian to determine the perfect feeding amount for your dog.
( Cups / Meal)

You're eligible to apply for our FREE ColiCare Program after checkout.

  • This horse already has an existing AutoShip SmartPak. Please select the "AutoShip" checkbox or enter a different horse name.
Please call 1-800-461-8898 to order this product.
New ship same day!
These are for:
Sign in to choose an existing
  • This horse already has an existing AutoShip SmartPak. Please select the "AutoShip" checkbox or enter a different horse name.
-
+

FINAL SALE - This item cannot be returned or exchanged.

FINAL SALE - This item cannot be returned or exchanged.

Order within and
have it by
Shipping to
Add these items to your cart to get your estimated arrival date.
Shipping to
The frequency you selected is not eligible for SmartPerks benefits that come with AutoShip supplement orders. In order to get benefits like free shipping and 10% off, set this product to ship at least every days. What are SmartPerks?

Overview

Supports muscle & immune system function

  • Includes magnesium, vitamin E, lysine, DMG, and methionine for normal muscle function
  • Also provides ingredients for immune system health and red blood cell production
IN-SYNC 4 Pellets are designed to help support efficient muscle function, immune system health, and normal blood cell production. The comprehensive formula includes lysine and methionine for muscle development; thiamine, niacin, riboflavin, and vitamin B12 for red blood cell production; natural vitamin E and other antioxidants for immune system function; and magnesium, selenium, and DMG for muscle function. In addition, key ingredients such as magnesium, vitamin E, lysine, and DMG may also help manage muscle discomfort.

Other ways to support success

100% Happiness Guarantee
At SmartPak, your happiness is at the core of everything we do. We put our products to the test in our barns and on our horses, and back every order with our world-class customer service so that you can shop with confidence. As part of our Happiness Guarantee, we promise you:
  • Expert advice from riders
  • Free shipping every day
  • Free return shipping on sized items
  • Hassle-free returns up to 365 days after purchase

Ingredients

(Maintenance Dose = )
Ingredient Amount
  • Ingredient Per Serving Per Pound

How the Ingredients Work

    •  
    •  
    •  

Instructions

Instructions for Use:
Horse Weight Recommended Amount Loading Amount

Research

Reviews

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.

IN-SYNC 4™ is rated 4.9 out of 5 by 7.
Rated 5 out of 5 by from Works very well!! Started my gelding on this about 4 months ago and he has gained weight, held and built muscle and kept his brain, which is pretty awesome considering he's been on stall rest for an injury. Very pleased with this product.
Date published: 2020-10-08
Rated 5 out of 5 by from Boost of energy and more focused I bought this one month ago and my mare is completely changed.
Date published: 2020-05-28
Rated 5 out of 5 by from It really works! I bought this for a mare who had been neglected out in a pasture for a year. Bringing her into a stall, feeding and worming helped her a lot, but she was not muscling up, especially the top-line and her coat was dull. After only one month, she blossomed and is now being ridden for the first time in 6 years.
Date published: 2019-06-04
Rated 5 out of 5 by from Amazing results I upgraded from just using Med Vet's 5000 Magnesium to this and what a difference! My mare is all muscled up now without a change in exercise and her immune system has improved. She is a think skinned TB and is always getting cuts and scrapes and now these are healing in practically a day instead of a week. It's expensive but the ingredients are amazing and worth it.
Date published: 2019-05-29
Rated 5 out of 5 by from Amazing supplement I won a 2 month supply of this supplement and used it for my crazy horse who had a previous tying up incident. Not only has In Sync prevented any new tying up incidents but it has also made my horse fill out and look more muscular. His coat is shiny, his feet are great AND he is so much calmer then before!! Not drowsy or groggy but not being a rearing, screaming freak at events like he used to be. I am beyond happy with In Sync 4 and will never take him off it.
Date published: 2017-10-12
Rated 5 out of 5 by from MVP never disappoints!! I've been feeding MVP supplements for some time now and recently added this to the diet of 2 of my horses. My 24 year old isn't riding sound, but can be lunged lightly and I've noticed better muscle quality on him just in a short time and nothing else in his diet has changed. Just started it 2 weeks ago on my barrel horse and am looking forward to seeing the changes in him as well soon. I trust MVP products and I don't feed anything but MVP supplements. I recommend this for a variety of horses, I have several friends who use it and I've seen their results which prompted me to add this to mine!
Date published: 2017-08-07
Rated 4 out of 5 by from Great! Great product, produces a great top line on my gelding
Date published: 2017-02-14
  • y_2021, m_5, d_14, h_18
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.15
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_7
  • loc_en_US, sid_13801, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_smartpak
  • bvseo_sdk, net_sdk, 3.2.0.0
  • CLOUD, getContent, 47ms
  • REVIEWS, PRODUCT

Q&A

Videos

Simplify with SmartPaks | Consistent, Custom, Convenient
Simplify your life with SmartPaks: custom-made, pre-measured daily doses of your horse's supplements.
View all

Recently Viewed View all

Customers Also Shopped For
For use in horses in training and sales ...
Description:
For use in horses in training and sales preparation. Body Builder has been used by some of the best in the industry successfully sine 1985. Rice bran oil and rice bran oil extract contain the natural compound gamma oryzanol. Body ...
Cool Calories 100 is a concentrated energy supplement ...
Description:
Cool Calories 100 is a concentrated energy supplement suitable for all types of horses. Cool Calories 100 will provide essential fatty acids for skin and hair condition, as well as calories for weight gain and exercise performance. Cool Calories 100 ...
Cool Omega 40+ provides a unique blend of ...
Description:
Cool Omega 40+ provides a unique blend of fat and proteins for today’s active horses. Perfect for supporting a healthy weight without the negative impacts that come with increasing your horse’s serving of grain, these pellets are easy-to-use and highly ...
dac® Oil supports resilient skin and a shiny ...
Description:
dac® Oil supports resilient skin and a shiny coat, and provides additional calories for healthy weight gain. The balanced blend of oils that make up this formula include canola oil, flaxseed oil, wheat germ oil, fish oil, and rice oil. ...
Fat-Cat is a concentrated natural muscle developer with ...
Description:
Fat-Cat is a concentrated natural muscle developer with amino acids to support weight gain, coat health, and energy levels. Fat-Cat is a great way to supply muscles with protein building blocks and beneficial vitamins and minerals.
Gleam & Gain Supreme 60 provides 60% fat ...
Description:
Gleam & Gain Supreme 60 provides 60% fat from stabilized flaxseed, rice bran, soy oils, sea algae, and DHA. These healthy fats are excellent for performance, weight gain, growing horses, and stallion fertility. This tasty formula comes in a prebiotic ...
Every horse owner wants their partner to have ...
Description:
Every horse owner wants their partner to have strong, healthy muscles to power performance; whether that means jumping the course, winning the halter class, or hitting the trail. Supplements like this formula provide a basic level of support for lean ...

Qualifying Items

Qualifying items are eligible for free shipping, every day. Look for the badge below on the product page to confirm that your item ships free!
SmartPerks
Free Shipping

Ride Along Items

Ride Along items are eligible for free shipping when shipped with your next AutoShip order or any qualifying item. Look for the badge below to identify a Ride Along item.
Ride Along Item
Ships free with a qualifying item
All of our supplement and product expertise is just a text away. Ask questions, manage your account, and place orders by texting 26756 from your mobile phone. Have a great ride!

Our experts are available
Monday – Thursday 9:00 am – 5:00 pm EST
Friday 9:00 am – 3:00 pm EST

*By texting 26756, you're giving SmartPak your consent to text you to help resolve your issue, including automated replies, at the number you provided. To opt out, text STOP to 26756. Text HELP to 26756 for info. Msg&rates may apply. Consent to receive texts not required to buy products. Terms & conditions and the full Text Message Privacy Policy can be found at https://www.smartpakequine.com/content/2waytextTC in case you're interested.