
Round Lab Birch Juice Moisturizing UV Lock SPF 45 is a product with 46 ingredients: Avobenzone, Ethylhexyl Salicylate, Homosalate, In, Water, Butyloctyl Salicylate, Propanediol, Acrylates Copolymer, Butylene Glycol, Caprylyl Methicone and 36 more.
Contains: Vitamins - Niacinamide, Ascorbic Acid (Vitamin C); Antioxidant - Niacinamide, Sodium Stearoyl Glutamate, Tocopherol, Ascorbic Acid (Vitamin C);
Organic score: 17% natural, 63% chemical. Vegan - No; Cruelty free - No; Reef safe - No;
Positive effects
Concerns
INCI - Full Breakdown
Avobenzone is the only chemical UV-protection component with a broad spectrum coverage. It can help to block both UVA I and UVA II rays. It's safe and it is allowed to use at a 3% concentration in the USA and a 5% concentration in the EU countries.
There is one problem: avobenzone loses efficiency when exposed to the sun. If you are outside, it loses 36% of its ability to block UV rays an hour after application. That's why it's recommended to reapply sunscreen every 2 hours.
Water is a great solvent. It’s neutral and doesn’t provide any strong positive or negative effects. It just helps components to mix better and to transport active components.
Propanediol is a good solvent, emollient and humectant. It helps to moisturize the skin and prevent moisture loss. In haircare products, it conditions hair and improves absorption of the product.

Butylene Glycol is a very popular synthetic alcohol. It helps the product to absorb deeper and faster. It is also a solvent for other ingredients. As for the skin benefits, it helps to attract water and helps to make the skin softer.
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