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Bio Straight Straightening treatment

Bio Straight Nanoplastia: Straightens, hydrates, rebuilds, gives incredible shine.

– Faster application. It is easy to apply.
– There is no need to wash your hair before the procedure.
– Does not contain formaldehyde.
– Does not burn eyes or respiratory system.
– It does not produce a strong smell.

500 mle16.9 fl.oz
in stock 220.00


Bio Straight is a revolutionary and innovative nanoplastia treatment that has taken the market by storm. Bio Straight  straightens, hydrates, rebuilds, gives incredible shine and supports hair growth.

Nature Eva Bio Straight  was developed to promoting intracellular nutrition. Its effect reconstructs the fibre, leaving it shiny, frizz-free with a long-lasting smooth effect.  Bio Straight: with just one step, it is not necessary to wash the hair before applying the product. This reduces the proceduring time  by up to 40-60 minutes.

A perfect innovative hair treatment formula that is both safe and highly effective!

  • Faster application. It is easy to apply.
  • There is no need to wash your hair before the procedure.
  • There is no need to brush the hair before applying the straightening iron.
  • The hair can be washed on the same day.
  • Does not contain formaldehyde.
  • Does not burn eyes or respiratory system.
  • Holds no risk to the health of the client or the professional.
  • It does not produce a strong smell.
  • Straightens hair 100%.
  • Is dermatologically tested.
  • We are certified at national level in the European Union. Notification Portal Cosmetics. (CPNP).

Skin Test

Download manual PDF

Apply a small amount of the product to the forearm. Leave for 30 minutes, and rinse well. Check for any irritation or itching where the product has been applied. Continue observing for 24 hours. If no irritation or itching occurs, it is safe to continue with the treatment. In case of any abnormality, do not proceed, as there may be sensitivity to a component of the formula.

Step By Step

  1. Shake the bottle.
  2. Apply the product to every hair strand, distribute with the help of a fine toothcomb from roots to ends.
  3. Let the product act for 60 minutes.
  4. Pre-rinse (WET) the hair, DO NOT REMOVE the product.
  5. Dry the hair with the hairdryer. No need to brush.
  6. Apply straightening iron slowly in small sections, 15 times on average according to the structure and strength of the fibre.
  7. Wash the hair with post straightening Kit.
  8. Dry the hair again.

Important Notes

  1. For damaged hair and split ends: Apply Argan oil to the ends of the hair, and apply a straightening iron at a temperature of 180°C to a maximum of 200°C.
  2. For damaged blonde hair, iron with a temperature from 180 °C to a maximum of 200 °C to prevent colour loss according to the fibre strength.
  3. Always iron the roots more and the tips less, thus preventing excessive dryness from the heat. If the hair is very fragile.
  4. In hair processed by aggressive chemicals, do a strand test. Wait for period of at least 120 days, then applying the product. Repeat the strand test.
  5. When you see smoke coming out of the hair when using the straightening iron, do not be alarmed because this is as a result of the straightening product. For example, if you apply the straightening iron with shampoo or mask on, the hair will smoke.
  6. Do not apply excess amounts of the product on the topmost part of the scalp, because this may accumulate and cause thick hard dandruff on hair scalp, and make the customer feel some pain.
  7. Remember that, is not only the product that make the hair straighten, but also the straightening iron. The more time spent using the straightening iron  will get a better result.
  8. Hair dyed or highlighted may suffer discoloration. Work with low temperatures during volume reduction according to the type of hair.


Follow the instructions for use: Nature Eva is not responsible for misuse of the product.

This product should only be used for the intended purpose, it is dangerous for any other use (Article 109-Decree 79.094/77). Keep out of reach of children and pets. Carefully follow the instructions. Do not apply if scalp is irritated or injured. Product with acid pH. It can produce allergic reactions, before use, test the hair. If irritation occurs, discontinue use. If irritation does not disappear, consult a doctor. Avoid contact with eyes and mucous membranes, and if there is contact, wash with water. Not recommended for pregnant women and children. Use on pregnant women only with written permission from a doctor.

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