There is no Recommended Dietary Allowance (RDA) for inositol. Dosage information can be found on each individual inositol product; do not exceed the recommended dose on the label unless your healthcare provider specifically tells you to do so. In studies, a wide range of inositol dosages have been used for treating various conditions, ranging from 6 to 18 grams per day.
Inositol is a dietary supplement. It is important to note that unlike medications (for which the standard doses have been well established), there is less information for determining the best dose for supplements, including inositol. However, there is some information available about inositol dosing, based on clinical studies and practical experience with the supplement.
There is no Recommended Dietary Allowance (RDA) for inositol. Inositol is found in many foods and is also produced by the human body. Most people do not need to take additional inositol. However, if you are interested in taking inositol, be aware that there is little reliable information to guide you in your choice of inositol dosage. In studies, a wide range of inositol dosages have been used for the treatment of depression, panic disorder, and obsessive-compulsive disorder (OCD), ranging from 6 to 18 grams (6000 to 18,000 mg) per day.
Studies have used a lower dosage (1200 mg per day) of a specific form of inositol (d-chiro-inositol) to treat polycystic ovary syndrome (PCOS). However, this form of inositol is not widely available.
Some considerations for people taking inositol include:
- It is important to find a trustworthy and reputable inositol manufacturer. Some dietary supplements have been found to be contaminated with heavy metals or prescription drugs, and some have been found to have much more or much less of the featured ingredient than their label states. Your pharmacist is a good resource for information about which manufacturers are most reputable.
- Be sure to follow the directions of your particular inositol product. Do not exceed the recommended dose on the label unless your healthcare provider specifically recommends that you do so.
- If you are unsure about anything related to your dosage or inositol dosing in general, please talk with your healthcare provider.