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The PlainCBD Blog

Every PlainCBD guide, newest first: CBD basics, oils, drug testing, safety, lab reports and more.

Drug TestingNov 13, 20268 min read

How Long Does CBD Stay in Your System? What Research Shows

CBD's half-life ranges from hours after one dose to days with daily use. Here's what studies show, and why THC is the real drug-test concern.

Moderate evidence

Oils & TincturesNov 13, 20268 min read

Hemp seed oil and CBD oil are not the same. Learn which one has CBD, the label terms that confuse buyers, and how to check a…

Strong evidence

Safety & Side EffectsNov 13, 20267 min read

No fatal CBD-only overdose appears in the sources we reviewed, but high doses can strain the liver, and THC products pose real risks to kids and…

Moderate evidence

Oils & TincturesNov 12, 20268 min read

How CBD oil is made, from decarboxylation and CO2, ethanol or hydrocarbon extraction to winterization, carrier oils and lab testing.

Moderate evidence

Safety & Side EffectsNov 12, 20267 min read

Sleepiness is a common CBD side effect, especially at higher doses or with alcohol, sedatives, or THC. Here's what the FDA and research say.

Strong evidence