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CBD Hemp

How do I Choose CBD?

What are the most important factors to look for when choosing CBD?  Read further down the page for a more complete explanation of each characteristic.  

We recommend you ask your doctor, the store clerk, or the bud tender about these CBD characteristics:


  • FULL SPECTUM - including as many as 500 phytocannabinoids, terpenes, and flavonoids

  • NANO-ENHANCED – for greater absorption and passage through the blood stream and cellular membranes.
  • ​THE ENTOURAGE EFFECT - describes the synergistic effect of up to 500 phytocannabinoids, terpenes and flavonoids
  • EXTRACTION PROCESS – CO2 leaves no toxic residue.  Solvent based extraction leaves residue. 

  • FLAVOR – Is the flavor and after taste pleasant or does the natural earthy hemp flavor linger in your mouth? 

  • CLEAN LABELING – ideally, your CBD contains only a few recognizable natural ingredients

  • SOPHISTICATED DOSING - can you easily adjust the dose up or down and repeat the ideal dosing you determine? 

  • 3rd PARTY LAB TESTED – for purity and active ingredients


  • BOTH ORAL and TOPICAL – can you use the same formula both orally and topically, or do you have to buy multiple formulations?

  • BEST VALUE – Can you get a better deal on a two-month supply of quality CBD Hemp Tincture anywhere else?  

  • TAX DEDUCTIBLE and SALES TAX EXEMPT - Rejuvenation Science provides the only CBD Hemp Oil that may be tax deductible and California sales tax exempt when recommended by your medical practitioner for a specific medical condition, saving patients up to 50% of the cost.  See discussion of IRS regs for details. 
  • PRODUCT REVIEWS - look for authenticity. Please see product pages for our reviews.  

Rejuvenation Science CBD Hemp Tincture is Nano-Liposomal Enhanced, Full Spectrum, Organic, in a natural base of MCT oil from coconut. 

Special - Buy Now!

  • Buy two bottles, either flavor or a combination of flavors, and receive a $10 discount using coupon code CBDspecial. Good for the next two days.
  • Buy four bottles and automatically receive free shipping in addition to any other discount.  

CBD and the endocannabinoid system are involved in the regulation of appetite, immune system functions, sleep, and pain management.


Our CBD products contain simply full-spectrum organic CBD, natural organic MCT Oil from coconut, organic stevia and natural cinnamon or peppermint flavor. They are organic, naturally sourced, vegan, non-GMO, gluten-free, and have no artificial additives. 


Full Spectrum from Hemp

Our products are made using the highest quality FULL SPECTRUM HEMP. Full Spectrum Hemp is the finest grade cannabidiol refined to its purest form utilizing a state-of-the-art CO2 extraction process. We choose to source our products with full-spectrum hemp oil, which includes all of the cannabinoids found in the plant, so all the cofactors in the plant provide an "entourage effect." These different compounds work together to amplify the beneficial effects of a small dose.

We blend our CBD with MCT oil, derived from coconuts. This process helps you effectively absorb the rich compounds of the oil, and promote a healthy metabolism. 

The Entourage Effect

The entourage effect refers to how various cannabinoids and other natural constituents work together synergistically to magnify their potential therapeutic properties. Introduced in 1998 in a study by Israeli researchers Shimon Ben-Shabat and Raphael Mechoulam, the entourage effect theory maintains that isolated or synthetic cannabinoids aren’t as effective at eliciting curative effects as when all of the natural constituents work together harmoniously. Supporting the entourage theory, a full spectrum formulation is recommended.1

The entourage effect explans why most people do not feel the benefit of CBD isolate.  A tiny amount of THC in full spectrum CBD potentiates the other CBD molecules.  

Echoconnection.org, a non-profit independent group, provides a great explanation of the entourage effect

Nano-Enhanced to Maximize Effects

Nanoparticle technology is on the cutting edge of CBD development. This process involves coating the compound with lipids - microscopic fat from coconut oil, which allows the effects to be stronger and more immediate. You will get much more out of our product with fewer drops! 

Rejuvenation Science Nano Enhanced Hemp Oil uses the industry-leading phospholipid encapsulation system, providing rapid uptake and unparalleled bioavailability. It will move through cellular membranes with much more speed and ease. You will get much more out of our product with less drops. Nano-enhanced CBD can be absorbed into your bodies systems at a rate close to 90% compared to only 35% for other CBD products on the market!


Such a simple concept, but most hemp products don't get it right.  Every single doctor who has tried our CBD Hemp Tincture and commented on the flavor has expressed surprise that it tastes so good and there is no unpleasant aftertaste.  

Clean Labeling

As stated in the organic description, our CBD Hemp Tincture contains only four recognizable ingredients - full spectrum organic CBD, natural organic MCT Oil from coconut, organic stevia and natural cinnamon or peppermint flavor. Nothing more, nothing less.  


When you are trying to balance your endocannabinoid system, more CBD is not necessarily better.  In fact, preliminary research shows that people respond to a variety of doses that represent a bell curve, where the ideal dose is in the middle of the range between too little and too much.  Ideal dose is different for each individual and that is why we suggest starting with a few drops twice a day and increasing the dose a couple of drops every few days to find your ideal dose,  Doctors refer to this as titrating the dose up.  

Some CBD brands make you think that more is always better.  I have never seen a nano-enhanced brand that suggests significantly higher doses are better.  That is not true for most people.  Save your money, because the higher the dose the less effect it will have in most cases.  You are trying to balance your endocannabinoid system, not overwhelm it.  

Both Oral and Topical

Nano-enhanced increases absorption through cellular membranes.  This is designed for oral consumption.  However skin has celllular membranes and thus patients have found it to be effective when applied topically to an area where it is needed.  A combination of oral and topical use work best for some people.  Use as little as possible.  It is typical to feel results in 20 minutes to an hour.  

CBD, Hemp, and the Endocannabinoid System

Please review our CBD, Hemp and the Endocannabinoid System primer for information on how CBD works with the body's Endocannabinoid System.

Sourcing Our CBD

Our Premium Hemp CBD is derived from an exclusive, proprietary, strain of Organic Hemp, grown in Kentucky. The CBD tincture is prepared at a state-of-the-art, FDA registered, extraction, manufacturing, and packaging facility. 

Our team is 100% committed to quality, so we work with the best. Working with leading developers in hemp farming that exceed regulated practices for manufacturing facilities. Using CO2 Fluid Extraction is the safest and most effective way to extract CBD. This process results in an entirely pure extract free of solvents used by others.  Please see out Quality statement for more information.  
Rejuvenation Science Hemp Tincture is tested by a Certified 3rd Party Laboratory so you are guaranteed to know what you're getting. See current lab analysis in the right side bar. 

Doctor's FAQs

Here is a link to Doctor's frequently asked questions on CBD and Hemp.

Buy Now and Save!

  • Buy two bottles, either flavor or a combination of flavors, and receive a $10 discount using coupon code CBDspecial. Good for the next two days.
  • Buy four bottles and automatically receive free shipping in addition to any other discount.