partially hydrogenated oil
partially hydrogenated oil

Partially Hydrogenated Oil

Common names: Partially Hydrogenated Vegetable Oil, PHO, Hydrogenated Oil, Trans Fats (used in food labeling), E482 (European food additive code).
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KIDSADVISORY SAFETY RATING
See methodology
Risky
Partially hydrogenated oils (PHOs) are produced by adding hydrogen to liquid vegetable oils, transforming them into semi-solid fats at room temperature. This process enhances the shelf life and stability of food products, making PHOs a common ingredient in margarine, shortening, and various baked goods. They provide the desired consistency and texture in these products, often at a lower cost compared to animal fats.[1]
However, the consumption of PHOs has raised health concerns due to their trans fat content, which has been linked to an increased risk of heart disease. In response, regulatory bodies like the U.S. Food and Drug Administration (FDA) have determined that PHOs are no longer Generally Recognized as Safe (GRAS) for use in food. This decision has led to the removal of PHOs from many food products to protect public health.[1]

Safety Overview


Regulatory Bodies

FDA (US)
In 2015, the FDA determined that partially hydrogenated oils (PHOs) are no longer considered Generally Recognized as Safe (GRAS) for use in food products. This decision effectively bans their use in the U.S. food supply.[1]
Health Canada
Health Canada has proposed prohibiting the use of PHOs in foods, aiming to reduce trans fat intake among Canadians. This initiative is part of the broader strategy to improve the nutritional quality of the Canadian food supply.[2]
EFSA (Europe)
EFSA has not issued a specific safety assessment for PHOs. However, the European Commission has set maximum levels for trans fats in foods, indirectly limiting the use of PHOs.[3]
WHO (World Health Organization)
The WHO has called for the elimination of industrially produced trans fats from the global food supply by 2023, recognizing the health risks associated with their consumption.[4]

FDA GRAS

U.S. Food and Drug Administration – Generally Recognized as Safe (GRAS)
Current Status
Not Classified

EWG Rating

Environmental Working Group
  • EWG Rating: The Environmental Working Group (EWG) has not identified any concerns for partially hydrogenated vegetable oil in food products.[5]
  • Level of Caution: EWG has not identified any concerns for partially hydrogenated vegetable oil in food products.[5]
  • Possible Health Risks: EWG has not identified any concerns for partially hydrogenated vegetable oil in food products.[5]
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More about Partially Hydrogenated Oil

  • Baked Goods: Cookies, Crackers, Cakes
  • Spreads: Margarine, Butter substitutes, Mayonnaise
  • Fried and Processed Foods: Potato chips, Frozen pizza, Snack cakes

Historical Use
Partially hydrogenated oils (PHOs) gained popularity in the early 20th century as a cost-effective alternative to animal fats, offering longer shelf life and stability to food products.[6]
Current Exposure
Although PHOs have been largely removed from the food supply due to health concerns, they can still be found in some processed foods, particularly those labeled as containing "0 grams trans fat," which may still contain trace amounts.[footnote id=7 title="Prevalence of Partially Hydrogenated Oils in US Packaged Foods, 2012. Preventing Chronic Disease. " link="https://www.cdc.gov/pcd/issues/2014/14_0161.htm"

Cardiovascular Disease
Consumption of partially hydrogenated oils, which contain trans fats, has been linked to an increased risk of coronary artery disease by raising LDL cholesterol levels and lowering HDL cholesterol levels.[8]
Type 2 Diabetes
High intake of trans fats from partially hydrogenated oils may impair insulin sensitivity, contributing to the development of type 2 diabetes.[8]
Obesity
Diets high in trans fats have been associated with increased abdominal fat accumulation, a risk factor for obesity.[8]
Inflammation
Trans fats from partially hydrogenated oils can promote systemic inflammation, which is linked to various chronic diseases.[8]

Toxicological Studies
Research indicates that industrially produced trans fatty acids (IP-TFAs) from partially hydrogenated oils (PHOs) significantly increase the risk of coronary heart disease (CHD). A probabilistic evaluation estimated that daily exposure to IP-TFAs contributes to a substantial public health burden due to elevated CHD risk.[9]
Long-Term Safety
Long-term consumption of PHOs has been associated with adverse health effects, including increased risk of cardiovascular disease and other chronic conditions. The U.S. Food and Drug Administration (FDA) determined that PHOs are no longer considered Generally Recognized as Safe (GRAS) for any use in human food, leading to their removal from the food supply.[1]

High-Risk Groups
For individuals with cardiovascular conditions, consuming partially hydrogenated oils (PHOs), which contain trans fats, can exacerbate existing cardiovascular conditions by further elevating LDL cholesterol levels and increasing the risk of heart disease.[8] For individuals with diabetes, intake of trans fats from PHOs may impair insulin sensitivity, complicating blood sugar management and increasing the risk of diabetes-related complications.[8]
Health Impacts
High consumption of trans fats from PHOs during critical periods of growth and development can adversely affect lipid profiles and may contribute to the early onset of cardiovascular diseases.[8] Diets rich in trans fats from PHOs during pregnancy have been associated with adverse outcomes, including increased risk of preterm birth and low birth weight.[8]

Recommended Intake
Regulatory bodies, including the U.S. Food and Drug Administration (FDA), have determined that partially hydrogenated oils (PHOs) are no longer considered Generally Recognized as Safe (GRAS) for use in human food. Consequently, there is no established Acceptable Daily Intake (ADI) for PHOs, and their use in food products is prohibited.[9]

General Safety Level
Partially hydrogenated oils (PHOs) are not classified as allergens; however, their consumption has been linked to adverse health effects, including increased risk of cardiovascular disease.[1]
Sensitive Individuals
While PHOs are not common allergens, individuals with specific sensitivities to trans fats may experience health issues; however, such sensitivities are rare.[2]

FAQ

What is partially hydrogenated oil?

Partially hydrogenated oil is a type of fat created by adding hydrogen to liquid vegetable oil to make it more solid and shelf-stable.

What is partially hydrogenated soybean oil?

Partially hydrogenated soybean oil is a processed fat made by hydrogenating soybean oil, often used in processed foods but largely phased out due to trans fat health risks.

References

  1. U.S. Food and Drug Administration (FDA). (2015). Final Determination Regarding Partially Hydrogenated Oils. Federal Register.  Available at: https://www.federalregister.gov/documents/2015/06/17/2015-14883/final-determination-regarding-partially-hydrogenated-oils ↩︎
  2. International Union of Food Science and Technology (IUFoST). (2020). Partially Hydrogenated Oils. IUFoST Scientific Information Bulletin.  Available at: https://iufost.org/sites/default/files/documents/sibs/IUF.SIB-Partially-Hydrogenated-Oils.pdf ↩︎
  3. European Food Safety Authority (EFSA). (2010). Scientific Opinion on Dietary Reference Values for Fats. EFSA Journal, 8(3), 1461.  Available at: https://www.efsa.europa.eu/en/efsajournal/pub/1461 ↩︎
  4. World Health Organization (WHO). (2018). WHO plan to eliminate industrially-produced trans-fatty acids from global food supply.  Available at: https://www.who.int/news/item/14-05-2018-who-plan-to-eliminate-industrially-produced-trans-fatty-acids-from-global-food-supply ↩︎
  5. Environmental Working Group (EWG). (n.d.). EWG's Food Scores | Ingredient: PARTIALLY HYDROGENATED VEGETABLE OIL.  Available at: https://www.ewg.org/foodscores/ingredients/17010/ ↩︎
  6. The Demise of Artificial Trans Fat: A History of a Public Health Victory. JSTOR.  Available at: https://www.jstor.org/stable/48636202 ↩︎
  7. Gormley, J. J., & Juturu, V. (2010). Partially Hydrogenated Fats in the US Diet and Their Role in Disease. In Trans Fatty Acids: Sources, Health Risks and Alternative Approaches (pp. 1-20). Humana Press.  Available at: https://link.springer.com/chapter/10.1007/978-1-60327-571-2_5 ↩︎
  8. American Heart Association. (n.d.). Trans Fats.  Available at: https://www.heart.org/en/healthy-living/healthy-eating/eat-smart/fats/trans-fat ↩︎

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