Vitamin C, D, or B12 – Which is best?

Pop quiz time!

When it comes to supporting a healthy immune response, which of the following is most important:

Vitamin C, E, or B12?

The answer is… None of the above.

See, while all three of these are important nutrients… 

They are NOT the true building blocks of immunity. 

Sure, vitamin C is a potent antioxidant…

And E helps to stop the damage caused by harmful substances…

And B12 is key in making sure your red blood cells are healthy and ready to go…

But at the end of the day, these vitamins are all just elements that play a supporting role.

Antibodies are the real superstars of your immune system. 

You’ve probably heard of white blood cells – The soldiers who rush to the site of an intruder alert.

The reason white blood cells are so powerful is because they produce your biggest, baddest immune weapons: antibodies.

There are five different types of antibodies - IgG, IgM, IgA, IgD, and IgE.

Each one has its own function... 

But for long term immunity, the most important one is IgG because... 

IgG makes up 80% of your total antibody power.

Whenever IgG detects something foreign, it “tags” it and adds it to your immune systems’ memory bank… 

That way, the next time your body encounters the same germ, it can move quickly to neutralize it. 

However, sometimes your immune system gets overwhelmed by stress, lack of sleep, or poor dietary choices…

And your body can't produce enough IgG to keep up with demand.

That’s why Just Thrive created Ultimate IgG.

To naturally restock your body with additional IgG antibody troops. 

For you that means more antibody power where and when you need it most.

>> Go Here And Learn More About IgG Today 

By the way...

Numerous clinical studies show that Ultimate IgG’s antibodies provide “significant benefit to the immune system.”

If you want to give your immunity above-and-beyond support, tap HERE to try Ultimate IgG RISK FREE with the 100% money back guarantee.

Skip to product information
1 of 9

Just Thrive Ultimate IgG

Just Thrive  Ultimate IgG

Antibody power for total immune support

89 total reviews

*Free Shipping (Orders over $99)
Secure Checkout
Safe Shipping
Satisfaction Guarantee

About Product

Antibodies (aka, “immunoglobulins”) are your immune system’s first responders. When something bad pops up on the radar, they’re deployed to neutralize any unwanted guests. To stay healthy, your body needs lots of first responders – Especially Immunoglobulin G (IgG) which makes up almost 80% of your total immune fighting force. However, in times of high stress, your production of IgG can dwindle, leaving you vulnerable. Nobody wants that – Especially these days! That’s why we created Just Thrive Ultimate IgG. The easy-to-take capsules work to rapidly support your body’s IgG levels, meaning more immunoglobulin first responders where and when you need them most!


Learn about each ingredient

How To Take

DIRECTIONS: Ages 8+ take 1 capsule daily for a minimum of 4 weeks, then as needed or as recommended by a healthcare practitioner.

Shipping Info

Just Thrive is not responsible for any customs or duty charges. All customs charges are the responsibility of the customer. International orders cannot be shipped with expedited options.

  • You always save on every bottle and get FREE shipping
  • You are always in control. Change your shipping date or cancel future participation at any time by logging into your account or with a simple call to customer service or email us at
  • We ship your next order every 30 days so you save time and never run out.
  • Any coupon code used applies to first order only.


Just Thrive is passionate about good health, and we ensure the integrity and quality of our products. That's why we're proud to stand behind every sale with a 100% customer satisfaction "Bottom-of-the-Bottle" Guarantee:

If you're not 100% satisfied with your purchase of any Just Thrive product from, return it to us for a full refund* – even if the bottle is empty!

Please ensure you use the Return Portal to receive a refund.

*Excludes shipping. Applies to a maximum of two bottles purchased directly.

View full details

Customer Reviews

Based on 89 reviews
Sandra Trafalis
NPS score:
10 (Extremely likely)
0 (Not at all likely)
Likes: Feel better with it!
Really helps

This is an outstanding product that helped me with my immunity issues

NPS score:
10 (Extremely likely)
0 (Not at all likely)
Likes: Came pretty quick.
Improvements: Can you take vitamins when taking IgG or any other of your products.

So far my tummy is feeling much better. I don't seem to be as blotted.

Nora Humphries
NPS score:
10 (Extremely likely)
0 (Not at all likely)
Likes: It’s good!
Improvements: Can’t think of anything

I believe it’s a great supplement. Unfortunately i can’t take some supplements. I still don’t get it.
I’m doing some thing wrong.

Semina Younis
NPS score:
10 (Extremely likely)
0 (Not at all likely)
Likes: The product
Improvements: Ship to the UK without import charges!!
Great product

Not sure about the science, but my daughter and I have not been ill since taking for the past 1 year. Sure coughs and colds appear, but the ability to shrug off within a day is fab

Julie Marini
NPS score:
10 (Extremely likely)
0 (Not at all likely)
Likes: Your product is good- I need product that is higher in IgG
Improvements: I believe I will try a product that has one gram of IgG

Good product
I just need a product that has higher IgG levels
I have found one