Based on the available evidence, fenugreek has benefits for lowering blood sugar levels, boosting testosterone, and increasing milk production in people who are breastfeeding. Fenugreek may also reduce cholesterol levels, lower inflammation, and help with appetite control, but more research is needed in these areas.

It should not be used by children as a supplement. Potential side effects of fenugreek include diarrhoea, nausea, and other digestive tract symptoms and rarely, dizziness and headaches. Large doses may cause a harmful drop in blood sugar. Fenugreek can cause allergic reactions in some people.