Juice drinkers have higher-quality diets than people who don’t. The vitamins, minerals, and phytonutrients present in fruits and vegetables are concentrated in juice. Beneficial substances called phytonutrients are present in plants and may aid in promoting health and preventing illness. Juicing some fruits and vegetables, however, is either not advised at all or should only be done sparingly. One should avoid juicing particular sections of some fruits and vegetables too. Apples can be juiced, but excluding the seeds. Amygdalin is a cyanogenic glycoside found in apple seeds. Cyanogenic glycosides are composed of sugar and cyanide. Cyanide is released in trace levels during the sugar's digestion. Cyanogenic glycosides can also be found in the pits of plums and peaches, although these are lesser likely to be juiced. Despite having lower amounts of cyanogenic glycosides than plums and peaches, apple seeds can nevertheless give an adult food poisoning or a stomachache. A young toddler may be poisoned if they consume apple seeds.
Additionally, the following plant parts should not be juiced:
- Carrot tops due to their toxicity
- Rhubarb leaves due to their toxicity
- Orange, grapefruit, tangerine, and tangelo peels, as they may induce gastrointestinal distress
Juicing fruits with low water content will be challenging and yield very little juice. The following fruits are low in water content: bananas, avocados, coconuts and any fruits or vegetables that are in dried form.

Mango
Juicing mangoes will lessen their fibre content because they have a pulpy texture. Cutting them into pieces and eating them is the best option. Despite their nutritional value, mangoes contain a lot of natural sugars that can cause blood sugar and insulin levels to spike.

Pineapple
Pineapples lose their fibre when they are juiced, and the sugar level rises as well. Blood sugar spikes are the result of consuming large quantities of pineapple juice, no matter how refreshing it can be. Because of its high sugar content, watch out for a quick spike in insulin levels.

Banana
Juicing bananas can be a nightmare as these are too soft and starchy and can result in a paste rather than juice. Instead, they can be blended into smoothies.
Avocado
Avocadoes possess a rich and creamy texture which makes them unsuitable for juicing.

Blueberries
These are small in size and contain a lot of pulp. Juicing them produces little to no liquid, and amounts to a lot of wastage. To make the most nutrition from blueberries, it’s better to consume them whole rather than juicing them.
Watermelon
Watermelons contain natural sugars, so people with diabetes can account for it in their daily meal plan.
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