Fenugreek is a well known herb to support breast milk supply for breastfeeding mothers. Kosher.
Not for use during pregnancy.    

ingredients

fenugreek seed, deionized water, vegetable glycerin
All Herbs Certified Organic

This product does not contain any milk, dairy, soy, egg, fish, shellfish, tree nuts, peanuts, wheat, or gluten.

The following are possible side effects. Discontinue use if adverse side effects appear. Fenugreek may cause upset stomach or excessive gas in mother or baby, may lower blood sugar, may cause break through menstrual bleeding, may lower the thyroid hormone T3 and should be avoided by women with hypothyroidism.

suggested use
Take 1 ml, 4 times per day. Women over 175 lbs take 2 ml, 3 times per day. May be taken with 1-2 oz. of liquid. Avoid additional liquids 15 minutes before and after each use.