Its flavour can range from very sweet to very sour depending on the variety and ripeness.  

Apples can be  supporting for heart health, aiding weight management, lowering the risk of type 2 diabetes, and improving gut health through fiber and antioxidants.  

Apple pomace - 1

The flavour of grapefruit is characterised as a complex, refreshing blend of tart, tangy citrus (similar to a sharp orange) with a distinct bitter undertone. Ripe fruit is quite sweet and juicy, while red varieties are generally sweeter and less bitter than white or pink, often with subtle berry-like undertones.  

Grapefruit is a nutrient-dense, low-calorie citrus fruit packed with vitamin C, Vitamin A, and antioxidants that support immune function, heart health, and skin health.

Number of times used as an ingredient: 1

It tastes sour, acid,  bitter because of their rind, fresh, zesty, floral and herbal.

Lemons have Vitamin C for immunity and collagen production, aiding digestion with citric acid as well as they can prevent kidney stones with citrate, and improve iron absorption from other foods. Also they can support heart health and promote hydration.  

FACT: Lemons vs Lemongrass:

1) Lemons are a tart, acidic fruit from the Mediterranean, used for their juice and zest, but...

2) Lemongrass – it is a tropical herb with a milder, grassier citrus flavour used in Asian cooking;

My conclusion is that lemon must be more expensive than lemongrass. To knock down on production prices, bearing in the mind that a manufacture still want lemon flavour and what is more, they want this brew call as lemon involved brew, they use lemongrass instead of lemon.

It is resulting the they lose the quality of aroma and flour that the consumer might expect.

Limes have a sharp, tart, and intensely acidic taste, often described as more bitter, complex, and green than lemons. Also, the flavour has been described as zesty, offering a pungent, slightly spicy, and mouth-puckering flavour with a subtle hint of sweetness.  

Limes are nutrient-dense citrus fruits packed with vitamin C, antioxidants, and compounds that boost immunity, improve skin health, and aid digestion. A single lime provides over 20% of the daily value of vitamin C, promoting collagen production for firm skin and reducing risk factors for heart disease. They also prevent kidney stones and enhance iron absorption.

 Interesting fact about the lime peel: it provides potent anti-inflammatory benefits, boosts immunity, supports cardiovascular health by lowering cholesterol, and aids digestion. 

An orange has a juicy, tangy, and fruity flavour that is reminiscent of citrus. It has a balanced taste profile with hints of bitterness, yet it remains refreshing and vibrant. 

They are highly nutritious citrus fruits packed with Vitamin C, fibre, potassium, and antioxidants that boost immunity, improve heart health, and promote radiant skin. Regular consumption supports collagen production, aids iron absorption to fight anaemia, and helps manage blood pressure and cholesterol.  

Also, regarding the benefits of orange peel, there are high concentrations of fibre, vitamins, and antioxidants as well. These benefits extend to internal health when consumed. 

Passion fruit flavour has often described as a vibrant, aromatic blend of tart citrus, sweet mango, and hints of guava or pineapple. The jelly-like pulp offers a sweet-and-sour profile, balancing a sharp, tangy bite with a rich, perfumed, and exotic sweetness.  

It is a nutrient-dense, tropical fruit high in fibre, antioxidants (vitamin C, A, polyphenols), and minerals like potassium and magnesium. It supports immune function, promotes heart health by managing cholesterol and blood pressure, aids digestion, improves skin health, and has a low glycemic index, making it beneficial for weight management and blood sugar regulation.