Functional foods are becoming increasingly popular, but many people still use them according to the habit of "drinking whenever convenient". In fact, the time of use can significantly affect the absorption capacity and biological effectiveness of each type of micronutrient. With iron, vitamin B12 and vitamin D, using them at the right time not only helps maximize benefits but also reduces the risk of adverse interactions.
Drinking at the wrong time, absorption may decrease sharply
Iron is an essential micronutrient for blood production, but it is also one of the substances most easily hindered from absorption. According to nutritional studies, iron is best absorbed when the stomach is empty. Therefore, the ideal time is to drink about 30 minutes before meals or at least two hours after meals.
Another important factor is vitamin C. When using iron with vitamin C, absorption can be significantly increased thanks to the acidic environment favorable for the dissolution and transportation of iron through the intestinal lining. Conversely, calcium and phosphorus are "rivals" of iron. Calcium supplements, calcium-containing antiacidic drugs or calcium-rich foods can reduce the amount of iron absorbed if used at the same time. Therefore, iron should be taken at least two hours before these products.
Dr. Jamie Alan, associate professor of pharmacy and toxicology at Michigan State University (USA), recommends: "Many cases of anemia are not due to iron deficiency in the diet, but due to improper iron use, causing the body not to absorb the necessary amount.
Vitamin B12: Time to affect energy and absorption
Vitamin B12 plays an important role in energy metabolism, nerve function and red blood cell production. The time of taking vitamin B12 can directly affect the feeling of alertness and effectiveness of use during the day.
Nutrition experts often recommend taking vitamin B12 in the morning or early afternoon. The reason is that this vitamin participates in the process of converting food into energy, so it should be taken early to help support better physical and mental activity during the day. Drinking too late, especially in the evening, can cause prolonged feelings of alertness, affecting sleep in some sensitive people.
Similar to iron, vitamin B12 is also better absorbed on an empty stomach. However, it should be noted to avoid using it at the same time as foods or drinks rich in vitamin C, as vitamin C can reduce the stability of vitamin B12 in the digestive tract. In addition, some drugs such as metformin or proton pump inhibitors can hinder the absorption of vitamin B12. Therefore, vitamin B12 should be taken at least four hours before these drugs.
According to Meghan Windham, assistant professor of clinical science at the University of Texas A&M (USA), "Separating the time of vitamin B12 use from some chronic treatment drugs is an important factor but is often overlooked.
Vitamin D: Take it at the right time to avoid affecting sleep
Vitamin D is a liposoluble micronutrient, essential for bone health, immunity and many other metabolic functions. The time to take vitamin D is also worth paying attention to, especially related to sleep.
Many studies show that taking vitamin D in the evening can reduce the production of melatonin, the hormone that regulates sleep. Vitamin D and melatonin work at opposite biological rhythms, so taking vitamin D too late can make it difficult to fall asleep or not fall asleep deeply. A more suitable time is morning or noon, preferably with a meal containing fat to increase absorption.
The body can synthesize vitamin D itself when the skin is exposed to sunlight, but this is often not enough, especially in winter or for people who are less exposed. In those cases, supplementing vitamin D at the right time will help optimize effectiveness without affecting the circadian rhythm.
Using functional foods is not just about drinking enough, but also about drinking properly. Just adjusting the timing appropriately, you can better utilize the benefits that iron, vitamin B12 and vitamin D bring to long-term health.
(The article is for reference only, not for professional advice. Always consult a doctor or medical expert if you have questions).
