Some site advocate oral use of EO though with dosage in honey.
But it's true on most bottle of pure and natural they advice not to take it orally or at least not undilute orally or transdermally.
Always mixing it with other vegetal oils or honey, maple syrup...
Weird since on hte other hand, it's know that EO are easily expulse out of the body through urine, transpiration, unlike synthetic medicine
The main reason a lot of EO sites recommend against oral ingestion is that it’s very easy to overdose on some oils and they don’t want to be liable for it. The FDA could shut down an EO company that’s distributing EOs and recommending their ingestion without being properly certified, and without selling EOs that are double distilled FDA approved EOs.
Double distilled EOs cost more. Those are the only EOs the FDA allows people to ingest because only double distilled EOs are FCC grade. Most EO dealers do not sell double distilled EOs. The few that do, recommend them for oral use, and sell them at a much higher price. All the rest say they are not for ingestion because the FDA will shut them down if they didn’t.
Lemon essential oil doesn’t need to be diluted to be taken orally in a capsule.
Some oils, like cinnamon oil, can irritate some people if taken orally in a capsule without dilution. For this reason, many EOs vendors simply recommend that they are all diluted before use. This keeps them out of legal trouble.
If you sold lemon oil that was not double distilled FCC grade and recommended people use it undiluted in capsules, you would get shut down by the FDA, plain and simple. This is simply not allowed. If you sold double distilled FCC grade lemon oil you could recommend this however.
Places that sell pure peppermint oil in capsules are selling double distilled FCC grade peppermint oil. This is allowed by the FDA. If it was simply 100% essential oil, but not double distilled, this would be illegal.
Peppermint oil can be irritating to some people if taken orally so it’s usually put into enteric coated capsules. It can cause heartburn. I’ve tried large doses of peppermint oil and have gotten heartburn from it.
Orange oil is also sold in capsules as “limonene”. It’s undiluted, sold as is. It doesn’t require enteric coated capsules. But to legally sell it for ingestion, again, it must be double distilled orange oil.
FCC essential oils are just 100% pure essential oils that are redistilled. That’s all. There’s nothing special about them, but I believe they must be redistilled in the USA in a special FDA certified clean room or they cannot be FCC grade.
The only difference between 100% therapeutic grade oils and FCC grade oils is the redistillation process, that’s all.
You can buy any pure oil, redistill it in an FDA certified clean room, and it is now FCC grade and can be legally sold for ingestion; as long as it is an FDA GRAS or FDA FA listed oil. Lemon oil is an FDA GRAS oil.