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For constipated babies over 1 month old, some pediatric sources limit apple juice to 1 ounce per month of age daily, with a 4-ounce cap.

There’s no proven dose, but most sources limit apple cider vinegar for heartburn to 1–2 diluted tablespoons (15–30 ml) per day, taken with food.

For kidney stones, dilute 1–2 tablespoons of apple cider vinegar in plenty of water once or twice daily, only with your doctor’s approval.

A common rule of thumb is 1 ounce of apple juice per month of age per day, up to 4 ounces, for short-term relief of infant constipation.

A common starting amount for constipation is 4–8 oz (120–240 mL) of 100% apple juice once daily, staying under about 2 cups per day.

For most healthy adults, a common daily amount of apple cider vinegar is 1–2 tablespoons (15–30 ml) diluted in plenty of water.

Most adults do well with 1–2 teaspoons of apple cider vinegar diluted in a large glass of water once or twice a day, not more than 2 tablespoons.

Most adults start with 1–2 teaspoons of apple cider vinegar diluted in water once or twice daily for weight loss, staying under 2 tablespoons per day.

Most adults who try apple cider vinegar for blood sugar use 1–2 tablespoons daily, diluted in water and timed around higher-carb meals.

For a constipated baby, offer 1 oz of 100% apple juice per month of age per day, up to a short-term maximum of about 4 oz.