evidence: Factually inaccurate: Peanut oil isn’t an ingredient in vaccines. Risk factors for peanut allergies are unclear, but are commonly linked to age, genetics, and history of other allergies—not consumption of peanut oil. Misleading: Peanut allergies and peanut oil allergies aren’t one in the same. Some people with peanut allergies may safely consume peanut oil, particularly if it’s the highly-refined variety used in cooking and frying. While peanut oil was used as a vaccine adjuvant ingredient in a clinical trial for an influenza vaccine in the 1960s, this vaccine wasn't approved for public use.