Without using bleach, here are some tips for eliminating yellow from white garments.

The use of some natural methods is very successful in the process of naturally bleaching a white T-shirt, sheets, towel, or white T-shirt.

Soap from Marseille
Marseille soap is so effective at removing stains that it may even remove the most stubborn spots. It is sufficient to use Marseille soap and cold water to the stain on your clothes in order to make use of it. Rub the soiled area lightly to loosen it, and then wait for an hour or two before removing it. After that, you should place your item in the washing machine so that it may be brought back to its original whiteness. The bleaching characteristics of powder detergent make it the preferred option. Drying your clothing in the air is another way to protect the fibers of the fabric.
The white vinegar
In order to keep white garments in good condition, white vinegar is an excellent product to use. The first step in removing stains from clothing is to dilute four teaspoons of white vinegar in water. After that, soak the garment that has been discolored. To remove the stain, first soak it for one hour, and then rub it with a microfiber cloth. After that, put your item in the washing machine to get a result that is completely immaculate.
Soda for baking
Baking soda is an effective stain remover and may also be used to whiten textiles from a natural standpoint. It is recommended that you build a paste with this well-known white powder in order to eliminate yellow stains. It is necessary to combine a few teaspoons of baking soda with water in order to create a paste. Following that, apply the paste to the stains and let it to soak for half an hour before washing it as you normally would. To remove stains that are difficult to remove, combine baking soda and lemon juice and use a cloth that has been soaked in this solution. Allow it to rest for two hours, and then wash your garments in the washing machine.
The peroxide of hydrogen
The use of hydrogen peroxide as an alternative for cleaning white garments is very effective. The substance in question, which is also known as hydrogen peroxide, is recognized for its bleaching capabilities and has the ability to eliminate yellow markings. To do this, be sure to remember to soak the stain in hydrogen peroxide and then wait for one hour before proceeding. The stains should then be rubbed, and the garments should be placed in the washing machine. Wait for the air to dry.
Crystallized soda
Crystals of soda may be used for the purpose of cleaning objects. In order to do this, all you need to do is dissolve one cup of soda crystals in one liter of water. The best way to remove stains from your clothing is to soak them in this solution and then massage them with a sponge. If you want to protect your skin while doing this maneuver, don't forget to use gloves. The last step is to dry your garments in the sun after you have washed them in the washing machine.