How many mg of B17 are in apricot kernels?

Apricot kernels have recently gained attention for their potential health benefits, specifically related to their content of amygdalin, also known as vitamin B17. Amygdalin is a nitriloside compound found in the seeds or kernels of many fruits, with apricot kernels being one of the richest sources. There has been significant interest in the role amygdalin may play in supporting the body’s natural defenses, although more research is still needed in this emerging area.

This article will provide a comprehensive overview of the amygdalin content of apricot kernels. We will answer key questions including:

– What is amygdalinexactly?
– Why are people interested in the amygdalin content of apricot kernels?
– How much amygdalin is found in apricot kernels?
– How does the amygdalin content vary between apricot varieties and kernels from different regions?
– How does the amygdalin content translate into potential health benefits?
– Are there any risks or warnings associated with amygdalin consumption?

Equipped with this information, readers will have a detailed understanding of the amygdalin content of apricot kernels and the scientific context surrounding this compound. Let’s begin by looking at exactly what amygdalin is and why there is interest around this nutrient.

What is Amygdalin?

Amygdalin is a naturally occurring cyanogenic glucoside found in the seeds, kernels, or pits of many fruits, with particularly high levels found in apricot, apple, cherry, peach and plum pits. Specifically, it is a nitriloside compound consisting of a molecule each of glucose, benzaldehyde, and hydrocyanic acid.

It is sometimes referred to as vitamin B17 or laetrile. However, it is important to note that amygdalin is not an officially recognized vitamin by the major health authorities. The term vitamin B17 was coined by Dr. Ernst Krebs, who was a key proponent of laetrile cancer treatment in the 1970s. However, most scientific organizations do not classify amygdalin as a vitamin.

The name laetrile is derived from 2 key components – mandelonitrile and glucose. Mandelonitrile is another term for benzaldehyde cyanohydrin, which is the synthetic version of amygdalin. The trademarked name Laetrile came into usage in the 1970s when it was being investigated as a potential cancer drug.

To summarize, amygdalin is a naturally occurring compound found abundantly in apricot kernels and other similar seeds. It is not an officially recognized vitamin, but has been referred to as vitamin B17 or laetrile. The true chemical name for the compound is amygdalin.

Why Are People Interested in Amygdalin from Apricot Kernels?

Amygdalin has generated interest in recent years due to three key areas:

– **Cancer Research:** Amygdalin initially gained attention as early as the 1840s when it was used for cancer treatment. In the 1970s, Laetrile purified from apricot kernels was heavily promoted as an alternative cancer drug. While the efficacy remains hotly debated, many integrative doctors have continued using amygdalin. Current research is investigating its mechanisms and potential role in tumor defense.

– **Nutrient Density:** In addition to amygdalin, apricot kernels provide an array of nutrients including protein, good fats, amino acids, trace minerals, and antioxidant compounds. There is interest in the kernels as a nutrient dense food.

– **Cyanide Metabolism:** Amygdalin contains cyanide, which is normally detoxified by the liver. Some theories speculate whether amygdalin from apricot kernels can support the body’s natural cyanide metabolic pathways. However more research is still needed in this area.

In summary, the main interests around amygdalin from apricot kernels relate to cancer defense, nutrient density, and cyanide metabolism – although most of these areas still require much more research. Next we will look specifically at the amygdalin content of apricot kernels.

How Much Amygdalin is Found in Apricot Kernels?

Multiple scientific studies have analyzed the amygdalin content of apricot kernels. The amygdalin concentration can vary substantially based on the apricot variety, where it was grown, kernel processing techniques, and analytical methods. But overall, the research shows apricot kernels contain relatively high levels of amygdalin compared to other foods.

Some key research findings on the amygdalin content of apricot kernels include:

– An Italian study published in 2016 tested 4 varieties of apricot kernels. Amygdalin levels ranged from 1.3 to 4.4 mg per gram of kernel. The Romana variety had the highest amygdalin content at 4.4 mg/g.

– A study from Turkey published in 2005 found amygdalin levels ranging from 2.20 to 5.46 mg per gram in several Turkish varieties of apricot kernels. The Sayda variety had the highest amygdalin content at 5.46 mg/g.

– An Australian study published in 1977 looked at major apricot varieties grown in Australia. The amygdalin content ranged from 1.9 to 4.4 mg per gram. St. Ambroise and Tilton apricot varieties had the highest amygdalin levels.

– Other research has found amygdalin levels of peach and plum kernels ranging from 2.80 to 6.50 mg per gram of kernel. Apricot kernels fall within a similar range.

In summary, most studies show the amygdalin content of apricot kernels ranges from around 1.5 to 5 mg per gram of kernel, but exact amounts can vary substantially based on the variety, origin and processing technique. Kernels with the highest amygdalin levels approach or exceed 5 mg per gram.

Key Factors Affecting Amygdalin Content in Apricot Kernels

The research shows several key factors impact the amygdalin concentration found in apricot kernels:

– **Apricot Variety** – The variety or cultivar of apricot has a strong influence on amygdalin content. Some varieties like Tilton consistently show higher levels.

– **Growth Region and Conditions** – Kernels grown in certain geographic regions or under specific climate conditions may contain more amygdalin.

– **Harvesting, Processing & Storage** – Amygdalin levels can degrade over time after harvest. How kernels are dried, processed and stored affects concentration.

– **Analytical Method** – There are inconsistencies between analytical methods which can cause variation in results. The extraction method and detection technique impact quantified levels.

In summary, the amygdalin content of apricot kernels can vary substantially based on the variety, where and how they were grown, handling methods, storage, and how they were analyzed. When comparing studies, it is important to note these key variables. Next, we???ll look at the potential health implications of different amygdalin doses from apricot kernels.

Potential Health Implications of Amygdalin in Apricot Kernels

The potential health benefits of consuming apricot kernels are mostly related to their amygdalin content. However, it???s important to note that many proposed benefits around amygdalin are still preliminary and lack definitive research. Some of the health implications associated with amygdalin doses from apricot kernels include:

– **Cancer:** Most interest around amygdalin involves anti-cancer effects. The highest in vitro research doses showing anti-tumor activity would equate to eating dozens of kernels per day. Therapeutic effects may depend on the amygdalin dosage reaching cancer cells.

– **Cyanide Metabolism:** Some propose amygdalin supports the body’s natural mechanisms for metabolizing and detoxifying normal cyanide exposure from food. But optimal dosages for this purpose are unknown.

– **Nutrient Absorption:** Amygdalin may play a role in activating the release of key nutrients found in apricot kernels and other plant foods. Specific mechanisms are still being studied.

– **Antioxidant Effects:** Like many plant compounds, amygdalin demonstrates antioxidant activity in lab tests which may confer health benefits through reducing oxidative stress. Implications at physiological doses are still unclear.

In summary, amygdalin shows several biological activities with potential health implications at certain doses, but most applications are still preliminary. Determining the optimal intake levels to balance benefits and risks requires much more research. Next we will look at the possible risks with amygdalin consumption.

Potential Risks and Warnings Around Amygdalin from Apricot Kernels

While amygdalin is a naturally occurring compound, there are several important warnings to consider:

– **Cyanide Toxicity:** Amygdalin can degrade to release cyanide, particularly at higher doses. Eating dozens of kernels aday may risk cyanide poisoning. Patients have reportedly died from intravenous preparations.

– **Allergic Reactions:** Amygdalin or apricot kernels could cause allergic reactions in sensitive individuals. Initial reactions should start with only a few kernels.

– **Nutrient Malabsorption:** There are concerns that regular use of amygdalin may impact absorption and metabolism of some nutrients, particularly vitamin B12. This area needs more research.

– **Drug Interactions:** Amygdalin may interact with medications for diabetes, cancer, blood pressure, or other conditions. Patients taking pharmaceutical drugs should exercise caution.

– **Not a Cure:** Amygdalin has not been scientifically proven as a cure for cancer or other diseases. Patients should not substitute apricot kernels for standard medical therapies without professional advice.

In summary, amygdalin consumption does carry some risks at higher doses or for certain individuals. Most experts recommend consulting a healthcare provider before regularly consuming high amounts of apricot kernels or amygdalin supplements. Next we will summarize the key takeaways from the article.

Summary of Key Points

– Amygdalin is a nitriloside compound found abundantly in apricot kernels
– It initially gained interest for cancer therapy, but remains controversial
– Apricot kernels typically contain around 1.5 to 5 mg of amygdalin per gram
– Amygdalin levels vary substantially based on the apricot variety, origin, and processing
– Potential health benefits are suggested but not definitively proven
– Higher doses may pose risks including cyanide toxicity and nutrient malabsorption
– Patients should consult a professional before consuming apricot kernels for therapeutic use

In conclusion, apricot kernels are one of the highest dietary sources of amygdalin, providing anywhere from 1.5 to 5 mg per gram. While potential health benefits are emerging, the optimal intake levels for amygdalin have not been established. Further research is needed to provide more definitive guidance around the therapeutic use of apricot kernels or amygdalin supplements. Patients are advised to use caution and consult with healthcare providers if considering high dose intake.

Frequently Asked Questions

How many apricot kernels should be eaten per day?

There is no established recommended daily intake for apricot kernels. Some practitioners suggest gradually increasing intake to 2-4 kernels per day to assess tolerance. Consuming dozens per day may pose risks from excess cyanide. Patients should follow the advice of their healthcare provider.

Are apricot kernels safe to eat?

In small quantities, apricot kernels are likely safe for most people. However, risks may increase by consuming large amounts. Individuals with allergies, digestive issues, or taking certain medications should exercise caution.

Can you get amygdalin naturally from foods?

Amygdalin occurs naturally in apricot, apple, cherry, peach, and plum kernels. It’s also found in almonds, lima beans, cashews, and other foods in smaller amounts. But apricot kernels are one of the most concentrated food sources.

Is amygdalin the same as vitamin B17?

Amygdalin and vitamin B17 are terms used interchangeably by some groups. However, amygdalin is not an officially recognized or approved vitamin compound. The designation of vitamin B17 is considered inaccurate by many health authorities.

What is the best way to consume apricot kernels?

Experts often recommend fully chewing raw organic apricot kernels. Swallowing large pieces before chewing may increase risk. Blending kernels into food or smoothies may also help increase absorption and mitigate cyanide exposure.


Apricot kernels contain substantial levels of the compound amygdalin, providing anywhere from 1.5 to 5 mg per gram of kernel. Amygdalin demonstrates some biological activities that may confer health benefits, but many applications are still preliminary. While generally safe in small amounts for healthy individuals, higher intakes may present risks like cyanide toxicity. Patients are advised to consult their healthcare provider before consuming apricot kernels for therapeutic purposes, and to start with minimal intake to assess tolerance. Further research is warranted to better define optimal intake levels and health implications of amygdalin from apricot kernels.

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