GABA

GABA, short for gamma-aminobutyric acid, is a chemical your body produces. In the brain, it helps nerve cells reduce other nerve cells’ activity. It is also sold as a powder, capsules and an ingredient in sleep blends, usually to people looking for relief from tension or help winding down at night.

That biology makes for an appealing sales pitch, but swallowing GABA is not the same as delivering it directly to your brain. How much gets there, and how oral supplements might produce noticeable effects, remain uncertain. The small studies available cannot promise you better sleep.

By questionnaire

You might notice nothing, feel sleepy or describe feeling more relaxed. There is no particular sensation you need to chase. With a multi-ingredient sleep product, you cannot readily tell which ingredient accounts for an effect.

Headache, stomach discomfort and a burning feeling in the throat have been reported. Feeling groggy does not establish that you are getting better rest. Avoid driving if you feel sleepy or dizzy, and do not feel obliged to persist with a product that makes you feel unwell.

GABA may lower blood pressure. Combining it with blood pressure medication could add to that effect, although the interaction is not well studied. Check with your clinician or pharmacist first, including the other ingredients in any blend.

Long-term use and use during pregnancy or breastfeeding remain poorly studied. An over-the-counter label does not settle those questions. GABA supplements are also different from gabapentin and phenibut. Their risks are not interchangeable, and neither are the products.