Garlic

The bulb of this plant is originally from Asia which is widely used over the world as condiment, food and therapeutic mean, either systemically or locally. It contains sulfoxides (Alin), thiosulfinate (Allicin), polysaccharides, amino acids, vitamins, mineral salts and prostaglandins.
Alleged properties (some proven): hypolipemiant, vasodilator, anticoagulant, antioxidant, antimicrobial.
Indications based on the Commission E of the German Ministry of Health: Arteriosclerosis, Hyperlipidemia, Hypertension.
It may cause generalized and contact allergies, as well as local burns (avoid applying it on the nipple). It has a platelet anti-aggregation effect which is a reason to avoid any abuse by mothers with hemorrhagic disorders. Also, garlic may compete the liver metabolism of some anti-HIV medication causing a decrease in effectiveness.

One of the most used herbs during breastfeeding in many regions of the world. Some cultures use it as a galactagogue but such effect has not been proven.

Its odor and flavor is transmitted through the breast milk which may later induce the infant to longer suction periods that can condition to a better adaptation of several flavors at the introduction of complementary foods.
It is not responsible for the appearance of colicky pain in infants.