DHA is a nutrient required for brain growth and development, and has a repairing or stretching effect on the brain’s nerves, which may improve memory, but the level of improvement is relatively limited. DHA is found mainly in marine organisms and is more abundant in fish oil. It is mainly lecithin and unsaturated fatty acids, and is also an important part of the composition of the central nervous system. Therefore, taking DHA can help brain nerve growth and repair to a certain extent. In addition, it can also promote the synaptic connections in the brain. Since long-term memory is mainly accomplished by generating new synapses, taking DHA can improve memory to a certain extent. However, whether or not DHA has the above effects needs to be considered in light of other factors, such as the presence of other nutrients in the body, such as amino acids and minerals. If you only take DHA, but other nutrients are lacking, synapses will not be formed, and it will not improve your memory. DHA should be used under the guidance of a medical professional.