ProBoost Thymic Protein A: 10-ct TrialProduct Description ProBoost Thymic Protein A: 10 ct Trial Pouch. Back in stock, while supplies last! Our original, best selling product, in a 10 packet, trial size pouch. Each packet has 4 micrograms (12 Trillion active molecules) of Thymic Protein A per serving. And with 10 packets, you'll have just enough to see if it provide that immune support you're looking for. For nearly 30 years, people have been using ProBoost as their go to supplement to

consistent daily use

Looking for a bigger bundle with bigger savings

Consistent daily use is what allows it to do its best work — gradually supporting your body's ability to maintain immune balance over time

The powder format has been the original way to take TPA for over 35 years

That's okay

And it's the only thing Humanset has ever done

For nearly 30 years

1mcg/serving sublingual tablets

Purified Thymic Protein A (4 mcg per capsule)

and build from there

no capsule to swallow

Taking one or two tablets a day helps ensure that your TPA levels and