Soy free diet
Soy free diet


The soy free diet is a way of eating that does not include soy or soy derivatives, such as tofu, tempeh, and miso. Usually, an individual will adopt a soy free diet to test for or after discovering that they have a soy allergy. Soy contains estrogen-like isoflavones, called phytoestrogens. The exact mechanism of these constituents is not clear; however, some evidence suggests that soy may be beneficial in individuals with low estrogen levels, particularly post-menopausal women.

Soy has been a dietary staple in many Eastern cultures for thousands of years and has recently been adopted into Western culture.

The World Health Organization includes soy on a list of the eight most significant food allergens. The incidence of allergy to soy is estimated to be 6%, but this is thought to be an underestimate due to difficulty in recognizing the symptoms of the allergy. Soy allergy typically manifests in asthma-like breathing problems and skin rashes. In older adults, soy intolerant symptoms may include bloating, nausea, constipation, migraine headache, acne or eczema-like skin conditions, fatigue, and weakness.

People use this for...

The soy free diet has been used for people with soy allergy.

Pregnancy And Lactation: There is insufficient reliable evidence about the safety of the soy free diet in pregnancy and lactation. However, there is no reason to expect safety issues.

There is insufficient reliable evidence about the effectiveness of the soy free diet.

Natural Medicines rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.

Dosing & administration

    Adverse effects

    Interactions with pharmaceuticals

    None known.

    Interactions with herbs & supplements

    None known.

    Interactions with foods

    None known.

    Interactions with lab tests

    Interactions with diseases

    Mechanism of action

    The soy free diet is followed to avoid allergic reactions to soy. has licensed professional monographs from TRC Healthcare. Full monographs are available to Pro practitioner accounts.
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