In their many variations, nuts are a superfood praised as rich sources of minerals, vitamins, amino acids, proteins, and other bioactive compounds.
Chestnuts are champions for vitamin C, for instance. Pistachios contain the most vitamin A and potassium. Both are high in folic acid. Cashews enrich us with magnesium. The level of vitamin B3 (niacin) is the highest in peanuts, and vitamin E (tocopherol) is found in almonds.
Research Supports the Benefits of Nuts
A 2023 review published in the journal Foods found mounting evidence that a nut-rich diet can potentially prevent numerous chronic illnesses.According to the report, “The ingestion of phytochemicals from nuts and their positive influence on several diseases (cancer, heart disease, stroke, hypertension, birth defects, cataracts, diabetes, diverticulosis, and obesity) are established.”
The Nut–Cancer Health Connection
The World Health Organization predicts a considerable increase in cancer, with a potential of 32.6 million cases worldwide by 2045.Effective strategies, such as increasing dietary fiber, eating more fruits and vegetables, and physical activity, could potentially reduce cancer risk factors by approximately 42 percent.
The research points to certain phytochemicals and their mechanisms as preventatives for cancer.
Accordingly, walnuts, pecans, almonds, and pine nuts contain polyphenols, which inhibit carcinogenesis that is chemically induced. Likewise, hazelnuts and Brazil nuts hold helpful properties, called isoflavonoids, to balance hormonal mechanisms.
Nuts at a Glance
Walnuts
A review published in the journal Nutrition outlines the cancer-preventative properties of walnuts, as researched in animal studies with mice. It summarizes the following points:- A diet enriched with walnuts prevented the increase of “human breast cancers implanted in nude mice by [approximately] 80%.”
- Mammary gland tumors were reduced by approximately 60 percent through a diet containing walnuts in a mouse model.
- “Walnuts slowed the growth of prostate, colon, and renal cancers by antiproliferative and antiangiogenic mechanisms.”
Reducing inflammation in the body benefits many health conditions, including cardiovascular disease, obesity, diabetes, and cancer. Walnuts have proven valuable in all.
Almonds
Contrary to common belief, regular almond intake does not lead to weight gain, although the nuts contain almost 50 percent fat. Instead, almonds “appear to promote weight loss,” affirms a research paper published in the Journal of the Science of Food and Agriculture, which benefits obesity-related illnesses, such as cardiovascular disease and cancer.However, almonds also contain the highly controversial and much-researched bioactive compound glycoside amygdalin. Its pharmaceutical development as an anti-cancer treatment continues to be a topic of discussion in the pharmaceutical world.
As a commercial drug, amygdalin is distributed under the name Laetrile but has since been shown to have serious side effects, such as damage to nerves and the liver, a lack of oxygen in the blood, and confusion. Furthermore, the U.S. Food and Drug Administration has not approved Laetrile and has said that the compound shows only little anti-cancer effect.
While Amygdalin has proven its anti-tumor qualities, it still is not recommended as an extensive remedy, as some challenges need to be overcome.
Scientists place their hope in modern nanotechnologies as they further explore the qualities of amygdalin in cancer treatment. “There are several pieces of evidence to support the idea that amygdalin can exert anticancer effects against lung, breast, prostate, colorectal, cervical, and gastrointestinal cancers,” researchers stated in the 2023 review.
The compound “has been reported to induce apoptosis of cancer cells, inhibiting cancer cells’ proliferation and slowing down tumor metastatic spread,” they added.
The compound introduces cytotoxicity and apoptosis in the body and balances the immune function, which affects especially “solid tumors” such as lung or bladder cancer and renal cell carcinoma.
Despite limiting factors, such as the “primary stage” of both clinical and experimental research and the lack of high-quality publications on the topic, researchers still believe these studies to be promising regarding cancer treatments.
Peanuts
A human study published in the journal Gynecologic and Obstetric Investigation showed that “high consumption of peanuts, walnuts, and almonds appears to be a protective factor for the development of breast cancer.”The study group included 97 female patients suffering from breast cancer and a control group of 104 healthy women. Researchers analyzed their seed consumption via the Mantel-Haenszel test method and found a correlation between dietary nut intake and the development of breast cancer.
With 207 milligrams PS per 100 grams, unrefined peanut oil has the highest concentration of valuable beta-sitosterol—even higher than olive oil. Peanut butter “contains 144-157 mg PS/100 g.” Further refinement of the product results in lower rates of the active compound.
Researchers point out that people benefit from the consumption of this powerful antioxidant, as it displays “strong anti-tumor activities through inhibiting tumor cell proliferation, inducing cell apoptosis, promoting tumor cell differentiation, preventing tumor invasion and metastasis, and further moderating the host immune system to kill tumor cells.”
Pistachios
Another inconspicuous nut with plenty of healthy properties comes from the cashew family.In comparison with other nuts, the health profile of pistachios is even more advantageous. They are low-fat, a good source of vegetable protein, contain a remarkable amount of minerals (potassium) and vitamins (C and E), and are high in dietary fiber.
Diet, Inflammation, and Cancer
It has long been known that lifestyle and diet greatly impact our health.Attention to Quality
As phenolic compounds in nuts are highly unstable, they may be impacted by various processing techniques.Unfortunately, studies are rare, as certain types of nuts also react differently. Research that does exist indicates that thermal treatment negatively impacts nuts, such as hazelnuts, in which most of the polyphenol content is found in the skin.
Roasting also alters the profile of nutrients in nuts, which can lead to increased allergenicity and changed protein levels, for instance in peanuts. This processing technique seems to affect almonds and pistachios less—they stay stable or might even slightly benefit from the process. In contrast, the antioxidant profiles of hazelnuts and walnuts suffer.
Recommended Daily Intake
A 2020 narrative review highlights the extremely low consumption of nuts and seeds worldwide.Although nuts are continuously praised as a superfood, and the per-capita consumption in the United States increased to 5.6 pounds per person in 2022, recommended consumption is rarely met.
Feel free to mix and match, bake with nuts and seeds, or add them to your salads, lunch, and dinner. Mostly though, just have fun going “nuts about nuts” and assisting your health at the same time.