Instant coffee beans have a refreshing effect, primarily because they retain the caffeine present in coffee beans, which is the key ingredient responsible for the refreshing effect of coffee products.

Specifically, its refreshing characteristics include the following points:

Instant coffee beans, which are chewed and consumed, experience dual absorption of caffeine through the oral mucosa and gastrointestinal tract. Compared to brewed coffee (which is primarily absorbed through the gastrointestinal tract), they have a shorter onset time, typically taking 10-20 minutes to feel the refreshing effect. This makes them ideal for situations where a quick relief from drowsiness is needed (such as commuting, working overtime, or taking breaks during classes).

The duration of effect is moderate. The caffeine content of a single serving of instant coffee beans is usually lower than that of a cup of Americano (depending on the product specifications). The stimulating effect is not overly intense, lasting for about 2-4 hours. It is unlikely to cause excessive excitement or insomnia at night after drinking coffee.

No additional ingredients, especially the 0-sugar version you're interested in, cause rapid fluctuations in blood sugar levels due to sugar content. The energy boosting process is smoother, without the rebound effect of "initial excitement followed by drowsiness".

It should be noted that the alerting effect varies from person to person. Those who are sensitive to caffeine are advised to consume small amounts. Additionally, avoid consuming it within 3-4 hours before bedtime to avoid affecting sleep.