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Coleus forskohlii explained: what it is and side effects

Coleus forskohlii is a plant that grows in India, Thailand, and other subtropical areas, and its roots are a source of forskolin. Three of the products we reviewed list Coleus forskohlii, and none prints its individual amount: each includes it in a 200 mg proprietary blend.

By HowNook's Health desk · Updated

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What it is
Plant
Amounts the NIH names
Typical doses are 500 mg a day for 12 weeks.
In the products we reviewed
3, none prints the amount

What coleus forskohlii is

  • Coleus forskohlii roots are a source of forskolin.2
  • Coleus forskohlii grows in India, Thailand, and other subtropical areas.1

How much coleus forskohlii each product gives

Per serving, as each label prints it, against the amounts the NIH names

NIH: 500 mg per dose

Amount not printed: the dashed line shows the most it can be, the whole blend

GlucoTonicNot printed · at most 200 mg
Sugar DefenderNot printed · at most 200 mg
Glyco HarmonyNot printed · at most 200 mg

Before you take it

Side effects

  • Forskolin can cause frequent bowel movements and loose stools.1

Ask a doctor first

  • Talk with your health care provider before using this supplement for weight loss, especially if you have high blood pressure, diabetes, heart disease, liver disease, or other medical conditions.1

These statements have not been evaluated by the FDA. A supplement is not a medicine.

The 3 products we reviewed that list coleus forskohlii

ProductForm and servingColeus forskohlii per servingOur scorePrice a bottleBuy
GlucoTonic#1 in blood sugar supportLiquid drops1 mlNot printedIn a 200 mg proprietary blend9.9$49Check price
Sugar Defender#3 in blood sugar supportLiquid drops1 mlNot printedIn a 200 mg proprietary blend9.5$49Check price
Glyco Harmony#5 in blood sugar supportLiquid drops1 mlNot printedIn a 200 mg proprietary blend9.3$49Check price
Prices checked Oct 5, 2026

Questions people ask

What is Coleus forskohlii?

Coleus forskohlii is a plant that grows in India, Thailand, and other subtropical areas. Its roots are a source of forskolin.

What comes from Coleus forskohlii root?

Forskolin comes from Coleus forskohlii roots.

How much Coleus forskohlii should I take?

The NIH lists typical doses of 500 mg a day for 12 weeks. Ask a clinician before starting to discuss how much to take.

What are the side effects of Coleus forskohlii?

Forskolin, which comes from Coleus forskohlii roots, can cause frequent bowel movements and loose stools.

What should I check before taking a Coleus forskohlii supplement?

Talk with your clinician before starting a Coleus forskohlii supplement. Forskolin can cause frequent bowel movements and loose stools.

Which products we reviewed contain Coleus forskohlii?

GlucoTonic, Sugar Defender, and Glyco Harmony list Coleus forskohlii. Each includes it in a 200 mg proprietary blend per 1 ml serving. None prints the individual amount of Coleus forskohlii.

Also in these products

All ingredients

Sources

The products, amounts and prices come from each product's label and checkout, as its review shows them. AI drafts our pages from listed sources, figures are checked against them, and we have not tried the products.

  1. 1NIH Office of Dietary Supplements, WeightLoss Consumerods.od.nih.gov/factsheetschecked
  2. 2NIH Office of Dietary Supplements, WeightLoss HealthProfessionalods.od.nih.gov/factsheetschecked