The big picture...
"Health professionals do not recommend giving Karo or any other commercially available corn syrup to babies.
In the past, dark corn syrup was given to infants suffering from constipation, since at the time, it contained substances that softened stool by drawing water into the gut, thus relieving the condition. However, modern-day commercially available corn syrup may not have that same chemical nature, making these syrups, such as Karo, ineffective at relieving constipation.
Furthermore, there are also concerns that corn syrups may contain botulism-causing bacteria. Although this has not been proven yet, it is better to take your doctor’s advice. Botulism in infants can result in serious symptoms that may require hospitalization, such as:
Muscle weakness
Trouble breathing
Floppiness
A weak cry"
If you must......
"Allow the water to cool to room temperature.
Add in 1 can (13 oz.) of evaporated milk and 2 tbsp. of light Karo syrup. Stir until well-blended.
Pour into a sterilized half-gallon jar or bottles and store in the refrigerator until needed."
"For children younger than age 1, Karo syrup may cause a rare but serious form of food poisoning known as infant botulism.
Before starting solid foods, breast milk or commercially prepared infant formulas are all that should be fed to your baby unless your baby's pediatrician instructs otherwise.
Homemade formula should be thrown out if not used within 36 hours.
This formula should not be used if your child is lactose intolerant or if she has any issues with milk-based commercial formulas."