85 Or “who chews”; Grk ὁ τρώγων (ho trōgōn). The alternation between ἐσθίω (esthiō, “eat,” v. 53) and τρώγω (trōgō, “eats,” vv. 54, 56, 58; “consumes,” v. 57) may simply reflect a preference for one form over the other on the author’s part, rather than an attempt to express a slightly more graphic meaning. If there is a difference, however, the word used here (τρώγω) is the more graphic and vivid of the two (“gnaw” or “chew”).
86 Notice that here the result (has eternal life and I will raise him up at the last day) is produced by eating (Jesus’) flesh and drinking his blood. Compare John 6:40 where the same result is produced by “looking on the Son and believing in him.” This suggests that the phrase here (eats my flesh and drinks my blood) is to be understood by the phrase in 6:40 (looks on the Son and believes in him).

In other versions

Whoever feeds on my flesh and drinks my blood has eternal life, and I will raise him up on the last day.

Whoever eats my flesh and drinks my blood has eternal life, and I will raise them up at the last day.

The one who eats my flesh and drinks my blood has eternal life, and I will raise him up on the last day,

But anyone who eats my flesh and drinks my blood has eternal life, and I will raise that person at the last day.

The one who eats my flesh and drinks my blood has eternal life, and I will raise him up on the last day.

Whoso eateth my flesh, and drinketh my blood, hath eternal life; and I will raise him up at the last day.

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