CBD is well tolerated in humans with doses up to 600 mg not resulting in psychotic symptoms (15). In the few small placebo-controlled studies performed, no significant CNS effects were noted. Oral CBD undergoes extensive first-pass metabolism via CYP3A4, with a bioavailability of 6%. Following single doses in humans, the half-life of CBD when taken orally is about 1 to 2 days.1 In vitro studies have shown that CBD is a potent inhibitor of multiple CYP isozymes, including CYP 2C and CYP3A (16, 17). Whether these in vitro observations are relevant at plasma concentrations likely to be seen in patients is unclear. In addition, given its metabolism via CYP3A4, clinical trials of CBD in patients receiving enzyme-inducing AEDs, such as carbamazepine or phenytoin, will require detailed pharmacokinetic studies.
Weight plays a role in the effects of CBD oil, and bottle size should be selected based on how much you weigh. Let’s say you weigh less than 130 pounds and desire light CBD oil effects; this means that 11 mg or less will probably suffice per dose, giving roughly 40 doses from a 450-mg concentration. If you weigh more than 230 pounds and desire strong effects, then this same concentration will supply roughly 10 doses.
NuLeaf Naturals CBD oil tinctures are all full spectrum; it is 100% organic and never made with herbicides, pesticides, or chemical fertilizers. The brand offers a full spectrum pet CBD oil tincture, as well. NuLeaf Naturals offers free shipping to all 50 states; the brand’s products are also sold in more than 1,000 retail locations across the country.
Yes, the words "CBD tincture" and "CBD oil drops" are used interchangeably to describe drops of CBD oil that users place under the tongue. For the best results, we recommend that you hold the drops under your tongue for up to 60 seconds. This process allows the CBD oil to absorb sublingually into your bloodstream through the mucous membranes in your mouth.
At the top of our ranking is Portland-based Lazarus Naturals, which has honed a reputation for high-quality, affordable CBD. Their consciously crafted CBD is sourced from organic, Oregon-grown hemp which the company controls from seed to sale. With low prices, a robust assistance program, free shipping, and a 30-day, no questions asked return policy, you really can’t go wrong with Lazarus Naturals.
Sigmund & Gjordis Hemp Oil 1000mg is a premium hemp seed oil, yet it is not a full spectrum oil (therefore it does not contain CBD). Even so, the quality of the oil is superb, and it is packed full of Omga-3, Omega-6, and vitamin E – all of the components needed for cardiovascular health and stress management. Each bottle carries a 30-day supply with recommended dosage, and contains all-natural ingredients including the peppermint used for flavoring.

Serenity Hemp Oil is certified organic, made in the USA, and carries the most positive reviews by consumers, setting it at our #1 spot for CBD / hemp oils on Amazon. Larger than most products available on amazon, Serenity Hemp Oil comes in a 4 fl. oz. bottle, and with recommended dosage, it will yield up to 120 days of use. Flavors are orange and peppermint, with lots of positive feedback on both flavors. Manufactured by Serenity Remedies, this product is derived from all-natural methods and contains all-natural ingredients. A portion of proceeds from Serenity Remedies goes to charity as well, assisting patients in obtaining high-cost CBD oil to aid in their health problems.
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