What is the recommended ratio of essential oils to carrier oil in most pre-blended oils?

The recommended ratio of essential oils to carrier oil in most pre-blended oils is typically around 2.5% essential oils and 97.5% carrier oil. This concentration is considered safe for general use on the skin, balancing the therapeutic effects of essential oils with the need for a dilution that minimizes the potential for skin irritation.

Essential oils are potent and concentrated substances, and using them at lower concentrations within a carrier oil helps ensure their therapeutic benefits while reducing the risk of adverse reactions. This ratio is especially appropriate for individuals who may have sensitive skin or are new to aromatherapy, making it a standard guideline in many aromatherapy practices.

The other options represent higher concentrations of essential oils that might be appropriate for specific practices or individuals but are more likely to lead to skin irritation or sensitivity in general use. Therefore, they do not align with the widespread and safe application recommended for typical pre-blended aromatherapy products.