Vitamin C is an organic substance needed by the human body in small amounts, to maintain metabolic functions and also acts as an antioxidant for the human body, to ward off free radicals. The design of this research is a literature review of research articles collected by means of computer searches through google schoolar and repository. The search step is to enter the keyword Natural Vitamin C Antioxidant, Dosage and source of intake of vitamin C. Vitamin C or L-ascorbic acid is a water-soluble antioxidant (Aqueous Antioxidant). Vitamin C is part of the body's defense system against reactive oxygen compounds in plasma and cells. Vitamin C deficiency and excess will have an effect on our health. Lemons contain about 85 milligrams of vitamin C, guava has a high vitamin C content of 86 mg/100g, 1 pineapple or a plate of longan fruit (about 100 grams) contains about 80 milligrams of vitamin C, and in a bowl of spinach (about 30 grams) contains 8.5 mg of vitamin C.

Gunung Tunak Nature Tourism Park is a nature conservation area which is mainly used for tourism and nature recreation. Gunung Tunak Nature Tourism Park is one of 17 conservation areas managed by the Natural Resources Conservation Center (BKSDA), located in Mertak Village, Pujut District, Central Lombok Regency. Geographically located between 08º53'30.08º57'30 South Latitude, and 116º24'00” East Longitude. The purpose of this study was to determine the types of soil insects found in the Gunung Tunak Nature Park. This type of research is exploratory descriptive. The sampling method uses pitfall traps. Sampling locations include the park area in front of the butterfly breeding, and in front of the camping ground as posts 1 and 2. Sampling was carried out in the morning (07.00-09.30 WITA), and in the afternoon (16.00-17.30 WITA) with 3 repetitions. Soil insect samples obtained were identified at the level of the order and family at the Biology Laboratory, Mandalika University of Education. The results showed that 6 soil orders were found, namely: Orthoptera, Hymenoptera, Hemiptera, Diptera, Coleoptera, and Scorviones. The highest group of individuals found was the Hymenoptera Order with 93 individuals.

Fitoplankton banyak ditemukan di daerah aliran sungai. Sungai Jangkok merupakan daerah aliran sungai yang mengalir dari pegunungan di wilayah Kabupaten Lombok Barat melintasi Kota Mataram dan paling banyak berinteraksi dengan aktivitas manusia, karena di daerah aliran Sungai Jangkok terdapat 9 bendungan air yang digunakan untuk pengairan sawah. Penelitian ini bertujuan untuk: 1) mengidentifikasi jenis Fitoplankton di Sungai Jangkok Kota Mataram; dan 2) mengembangkan hasil penelitian tentang Identifikasi Jenis Fitoplankton di Sungai Jangkok Kota Mataram sebagai bahan penyusunan petunjuk praktikum ekologi. Jenis penelitian ini merupakan penelitian deskriptif eksploratif dan penelitian pengembangan. Teknik pengambilan data menggunakan teknik observasi, validasi, uji keterbacaan, dan dokumentasi, serta menggunakan plot berukuran 1 m x 1 m. Teknik analisis data menggunakan buku identifikasi dan teknik persentase. Hasil penelitian menunjukkan bahwa, terdapat 9 individu Fitoplankton yang terdiri dari 3 spesies yang telah ditemukan, meliputi: Protoperidinium cinctum, Bacilaria paradoxa, dan Chatocerros boreale. Sedangkan nilai rata-rata untuk uji validasi petunjuk praktikum sebesar 75% dalam kategori valid, dan uji keterbacaan mahasiswa sebesar 77% dalam kategori baik. Hasil ini menunjukkan bahwa, petunjuk praktikum yang telah disusun berada dalam kategori baik dan tidak perlu direvisi.