A hidratação ajuda na doação de sangue.

Because hidratação is a feminine singular noun in Portuguese, and in this sentence it is being used in a general sense: A hidratação = hydration / proper hydration.

Portuguese often uses the definite article with abstract nouns more naturally than English does. So where English might simply say Hydration helps..., Portuguese commonly says A hidratação ajuda....

The noun hidratação comes from the verb hidratar (to hydrate). The ending -ção is a very common noun ending in Portuguese, often corresponding to English -tion.

So:

• hidratar = to hydrate
• hidratação = hydration

This pattern is very common:

• informar → informação
• doar → doação
• organizar → organização

Ajuda is the third-person singular present form of the verb ajudar (to help).

Here, the subject is A hidratação, which is singular, so the verb is singular too:

• A hidratação ajuda = Hydration helps

Other forms would be:

• eu ajudo = I help
• você ajuda = you help
• eles ajudam = they help

Na is the contraction of em + a:

• em = in, on, at
• a = the
• na = in the / with the / when it comes to the

The verb ajudar is often followed by em when it means help with or help in something:

• ajudar em algo = to help with something

So:

• ajuda na doação de sangue = helps with blood donation

This sounds very natural in Portuguese.

Yes, but it can sound a little different.

• ajudar na doação de sangue = to help with the process/activity of donating blood
• ajudar a doação de sangue = to help/support blood donation more generally, almost like supporting the cause or practice

In many everyday contexts, ajuda na doação de sangue is the more natural choice when talking about the act or process itself.

Because de sangue here means of blood in a general, category sense: blood donation.

Portuguese often uses de + noun to classify or specify what kind of thing it is:

• doação de sangue = blood donation
• copo de água = glass of water
• banco de dados = database

If you said doação do sangue, that would usually mean donation of the blood, referring to some specific blood already known in the context.

Because sangue is being used generically here, not as a specific identified thing.

• de sangue = of blood / blood
• do sangue = of the blood

This is similar to English, where we say blood donation, not usually donation of the blood unless we mean a particular blood sample or a specific amount already mentioned.

Yes, very much. Doação de sangue is the standard and very common expression for blood donation.

Related expressions include:

• doar sangue = to donate blood
• doador de sangue = blood donor
• banco de sangue = blood bank

So this part of the sentence is very natural and standard.

Yes. This sentence maps quite neatly onto English structure:

• A hidratação = Hydration
• ajuda = helps
• na doação de sangue = with blood donation

So the order is very straightforward: subject + verb + prepositional phrase

That makes this sentence especially learner-friendly.

A helpful approximate pronunciation is:

ee-drah-tah-SOWN

A few important points:

• hi in Brazilian Portuguese usually sounds like ee
• dr is pronounced cleanly, not like English j
• the final -ção has a nasal sound, roughly like sown said through the nose

The stress falls on the last syllable: hidra-ta-ÇÃO

A rough approximation is:

doh-ah-SOWN

Important details:

• It has three vowel sounds in sequence: do-a-ção
• The stress is on the last syllable: doa-ÇÃO
• The ending -ção again has that nasal sound

So try to avoid compressing it too much. It is not one syllable in the middle; it is really do-a-ção.

Because prepositions do not always match one-to-one across languages. In this sentence, na literally comes from in the, but the most natural English translation is often with:

• ajuda na doação de sangue = helps with blood donation

This is very common in language learning: the literal meaning and the best natural translation are not always identical.

Yes, absolutely. That would also sound natural.

For example:

• Beber água ajuda na doação de sangue. = Drinking water helps with blood donation.
• Se hidratar ajuda na doação de sangue. = Hydrating helps with blood donation.

The original sentence sounds a bit more general or informational because it uses the noun hidratação rather than an action phrase. It is the kind of wording you might see in health advice or public information.