As per Bhagwad Geeta; entire world is divided in three categories: Satvic, Rajasic and Tamasic. Most of the Gujarati believes that swaminarayan told them to not eat onion or garlic. Little know fact that it wasn’t swaminarayan who said it.It has been written in Ved, Puran and Geeta for ages to not eat onion or garlic. Continue to read to understand real Hinduism. Not only eating onion and garlic makes you Tamasic, but there are other things which can also make you tamasic. In Bhagavad Geeta, Chapter 14, Lord Krishna has given detailed explanation of three moods of nature.

In Hinduism, food has been categorized in three categories; Tamasic food, Rajasic food and Sattvic food. 

onion-and-garlic

Tamasic

Tamasic foods are those that have a sedative effect on the mind and body. In general, they are considered detrimental. According to yoga, these foods are to be avoided as they can cause mental dullness and physical numbness. However, in times of pain they are allowed to alleviate suffering. Examples include: meat of an animal, fish, the fertilized egg, onion, garlic, scallion, leek, chive, mushroom, alcoholic beverages, durian, blue cheese, eggplant, opium, and any food which has been kept overnight before consumption.

Rajasic

Rajasic foods are those that have a stimulating effect on the mind and body. They are considered to be neither beneficial nor harmful. These foods lead to aggressiveness and irritability, and are often obtained in a way that harms another organism. Examples include: caffeinated drinks (such as coffee, tea (both black and green), cola drinks, and energy drinks), brown or black chocolate, paan, ginkgo biloba, overly spicy food and salty food

Sattvic

Sattvic foods are those that lead to clarity of mind and physical health. These foods are to be consumed on a regular basis. Sattvic foods are generally those which can be obtained without harming either another organism or one’s self. Only Sattvic foods are acceptable as offerings to the Hindu gods, with rare exceptions. Examples include: water, cereal grains, legumes, vegetables, fruits, nuts, unpasteurized and homogenized fresh milk and all fresh milk derivatives (mostly ghee, but also butter, cream, fresh or cottage cheese (paneer), and yogurt (lassi)), and raw honey.

How to identify the people with different moods 

Tamasic People: Tamasic people are lazy and ignorant, they often take more than 6 hours of sleep. They enjoy talking negatives of people and not interested in learning anything new.

Rajasic People: Rajasic people are overly attached to their work, and they cannot stop working. Achievements in material worlds gives them pleasure. They’re very selfish and emotionless.

Saatvic People: Saatvic people are difficult to identify, cause they often mind their work, and happy with whatever situation they’re in. Saativ people are very humble and calm in nature.

As per Bhagwad Geeta, people should avoid Taamsic food as much as possible. Saatvic people are capable to reach eternal happiness. Once they reached eternal happiness, they’re free from Karma and go to ‘golok’ where Purn Purshottam Krishna resides.