Summary
Highlights
For over 30 years, billions of dollars of supplements have been sold based on the incorrect idea that antioxidants in mega-doses are beneficial. Early observations showed that people eating more fruits and vegetables had lower rates of cancer and heart disease. This led to the theory that antioxidants in these foods were responsible for combating free radicals, seen as a cause of disease. This premise led to the development of antioxidant supplements, aiming to bottle these benefits.
The ORAC (Oxygen Radical Absorbance Capacity) score was used as a gold standard to measure antioxidant levels in foods like blueberries and acai, leading to their superfood status and expensive products. However, the FDA abandoned ORAC in 2012 because despite extensive research, no meaningful relationship was found between antioxidants, ORAC scores, and health benefits.
Fruits and vegetables are indeed beneficial, but not primarily because of antioxidants. Their main contribution to health is feeding and maintaining the gut microbiome. While they offer some vitamins and minerals, the fiber, polyphenols, and other plant compounds in these foods nourish the vast microbial universe in our gut. A healthy microbiome leads to reduced inflammation, a stronger immune system, improved mood, and better gut barrier function, rather than reducing free radicals directly with external antioxidants.
Studies on antioxidant supplements have been disappointing, failing to show health benefits and sometimes even causing harm. For example, beta-carotene supplements increased cancer rates by 28% in one study, and vitamin E (alpha-tocopherol) supplements increased prostate cancer risk by 17%. A major review of 68 studies found that beta-carotene, vitamin A, and vitamin E supplements actually increased mortality.
The body possesses an innate, highly efficient system to deal with free radicals, producing trillions of them per second as part of normal metabolic processes. This system relies on intracellular enzymes like catalase, superoxide dismutase, and glutathione. These internally produced antioxidants are far more effective, with catalase destroying millions of free radicals per minute, unlike supplement antioxidants which neutralize only one molecule per free radical and become used up.
Free radicals are not just harmful agents; they are also crucial signaling molecules generated on purpose during processes like energy production, exercise, and fasting. They signal cells to activate defenses, make more energy, and get stronger, primarily through the NRF2 master switch. Flooding the body with external antioxidant supplements neutralizes these essential signals, preventing the activation of the body's natural strengthening mechanisms.
Vitamin E from food provides eight different forms of tocopherol, including essential alpha and gamma tocopherols that work through distinct pathways. However, most vitamin E supplements contain only alpha-tocopherol in high doses. This isolated form can displace and interfere with the absorption of other crucial forms like gamma-tocopherol, leading to a deficiency and loss of protection.
R-alpha lipoic acid is an exception among antioxidant supplements. Unlike others, it recycles and regenerates other natural antioxidants like vitamin C, vitamin E, and glutathione, prolonging their activity. It is both water and fat-soluble, allowing it to enter cells and mitochondria where it naturally occurs, complementing the body's systems. It's crucial to look for the 'R' version, as the 'S' version is inactive and can compete with the effective R-form, reducing its benefits.
To truly benefit health, we must abandon the flawed premise of antioxidant supplements. Instead, focus on activating the body's natural NRF2 switch through conscious lifestyle choices. Regular exercise creates beneficial oxidative stress, leading to stronger cellular defenses. Fasting also activates this internal defense system. Incorporating broccoli sprouts, rich in sulforaphane, is another potent NRF2 activator. Overall, a diet rich in whole foods is crucial, as they provide complex nutrition as nature intended.