What’s the difference between phenibut hcl and phenibut faa?

There are two common forms of phenibut on market, one is phenibut hcl, the other is phenibut faa. What’s the difference between phenibut hcl and phenibut faa? Which one is better? Today, let’s make a comparion between phenibut hcl and phenibut faa.

Phenibut hcl or phenibut hydrochloride is the acid salt form of phenibut. Phenibut FAA means phenibut free amino acid. The effective substance of both is phenibut which has a chemical name “3-phenyl-4-aminobutyric acid”. 3-phenyl-4-aminobutyric acid which was synthesized in 1936 had been proved with anxiolytic, sedative and CNS depressant effects.

As the name has shown, phenibut hydrochloride is bound to a hydrochloric acid molecule, but phenibut faa doesn’t. The molecular formula of phenibut hcl is C10H13NO2.HCl, but the molecular formula of phenibut faa is C10H13NO2. That means, with same quantity, the content of phenibut will be higher in phenibut faa. If the phenibut hcl is a high quality product, the content of phenibut is about 87%, the other 13% is hcl. Meanwhile, a good quality phenibut faa’s purity is 99.5%. For example, 1000g good quality phenibut hcl has 870g phenibut, but 1000g good quality phenibut faa has 995g phenibut. Reading to here, you may think faa is better. Is phenibut faa really better than phenibut hcl? We will see.

Phenibut hcl is a white crystalline fine powder, and it can dissolve in water easily. In this form, it is a very stable substance. That makes it is easy to keep and take in oral. Phenibut faa is a fine powder. Phenibut faa is more expensive than phenibut hcl. Taking in oral, phenibut faa will become phenibut hcl in your stomach, and FAA is only about 15% more efficient than phenibut hcl. Comparing to their prices, phenibut faa doesn’t have much advantages. Taking with sublingual use, phenibut can be absorbed directly through the mucus memebrane under the tongue. Through this way, phenibut faa is approximately 300% more bioavailable than the HCl form when taken under the tongue. In addition, phenibut hcl has a bitter taste and a buring sensation, but phenibut faa is relatively milder, so phenibut faa is more suitable for sublingual use.

All things considered, there are no significant pharmacological differences between phenibut hcl and phenibut faa. You can choose one of them accroding to your personal preference.

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