(not a teacher)
This was well-written overall; I would suggest a few changes as noted below.
While there is a growing acceptance that chocolate does not cause pimples, the Acne Study Association has issued a public warning, stressing that acne-prone people are well-advised to avoid chocolate because of allergic reactions, which might lead to an outbreak of acne. Sometimes, however, this sweet and desirable temptation is difficult to resist. If a person "incidentally" takes a bite, the remedy is to reduce food intake by 20% over two days, so body detoxification systems would have less of a burden in handling the toxins in chocolate.
To avoid getting a bad rap, some chocolate manufacturers held a joint press meeting and claimed the above warning is a vicious lie and reassured customers that chocolate by itself cannot cause acne. Instead, they stressed the importance of the general diet and of genetic predisposition to acne. Their argument is underpinned by research that suggests that the fat in chocolate has no effect on the sebaceous glands, in which the excess production of sebum triggers acne. One spokesman for a chocolate manufacturer blamed the fruit and vegetable industry for spreading rumors for years in order to influence people to avoid chocolate. Chocolate corporations intend to fund scientific research to study the link between chocolate consumption and acne. However, one thing is always true: "too much of a good thing is never a good idea."