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Polypodium leucotomos

The active  ingredient : 10% Triterpene : ( include ecdysone and 20-hydroxyecdysone .)
The function : it has been used as a sunscreen to prevent sunburn and associate skin damage.
Although topical sunscreen  formulations provide  varied levels of protection against UV-A and UV-B radiation ;  protect from burning .
Aqueous extract of the root of P. leucotomos (PL) produced CNS depressant effect.
 It decreased the spontaneous motor activity, prolonged the pentobarbitone induced hypnosis, reduced body temperature and increased the reaction time to pain stimuli.
PL also caused prevention against supramaximal electroshock and pentylenetetrazol induced seizures.
 The fresh root used to be employed in extract and help to reduce the symptom of  melancholia ; rheumatic swelling of the joints. It is efficacious in jaundice, dropsy and scurvy, and combined with mallows removes hardness of the spleen, stitches in the side and colic.
The distilled water of the roots and leaves was considered by the old herbalists good for ague, and the fresh or dried roots, mixed with honey and applied to the nose.

In Europe, the fern species Polypodium Leucotomos has been used as an oral therapy
and  upper respiratory symptom.