what the research says, and what it doesn’t.

Prebiotic blend

In Everything Glow: 1.5 g — PHGG, gum arabic, inulin and FOS

Prebiotic fibres feed the bacteria already living in your gut. Researchers increasingly describe a gut–skin axis: the state of the gut shows up in the skin.

• Kapoor et al., J Clin Biochem Nutr, 2025 — Randomised, double-blind, placebo-controlled trial in 70 healthy adults. 5 g of PHGG a day for 12 weeks through winter improved skin hydration and elasticity and reduced water loss through the skin, compared with placebo. The authors work for the company that makes PHGG.
• Ohashi et al., Beneficial Microbes, 2015 — 10 healthy adults took 6 g of PHGG a day for two weeks. Bifidobacteria and butyrate-producing gut bacteria increased.
• Salem et al., Frontiers in Microbiology, 2018 — A review of how the gut microbiome and the skin influence each other.

Worth knowing: Both PHGG studies used more PHGG than one sachet contains. Our 1.5 g is a blend of four fibres.

Vitamin C

In Everything Glow: 65 mg — 100% of the daily requirement for women

Skin holds high levels of vitamin C, and the body needs it to make collagen.

• Pullar, Carr & Vissers, Nutrients, 2017 — A review of vitamin C in skin: it supports collagen synthesis and helps protect against UV-related oxidative damage.
• EFSA Journal, 2009;7(9):1226 — The European Food Safety Authority accepted that vitamin C contributes to normal collagen formation for the normal function of skin.

L-Glutathione

In Everything Glow: 500 mg

Glutathione is the body’s own main antioxidant. The open question for years was whether taking it by mouth raises the body’s levels at all.

• Richie et al., European Journal of Nutrition, 2015 — Six-month randomised, placebo-controlled trial in 54 adults taking 250 mg or 1,000 mg a day. Glutathione levels in the blood rose at both doses (by 30–35% in several blood measures at the higher dose) and fell back after a month off.

Worth knowing: Much of the skin research on oral glutathione measures melanin, because in India it is sold as a fairness product. We don’t make that claim, and we don’t cite those studies as a reason to take Everything Glow.

Alpha lipoic acid

In Everything Glow: 25 mg

Alpha lipoic acid is part of the body’s antioxidant network: it helps recycle other antioxidants, including vitamin C and glutathione.

• Packer et al., Free Radical Biology & Medicine, 1995 — A review of alpha lipoic acid as an antioxidant.

Worth knowing: This review is mostly laboratory and animal research, not trials in people.

Zinc

In Everything Glow: 5 mg — 38% of the daily requirement for women

Zinc is an essential mineral that the skin, hair and nails rely on.

• EFSA Journal, 2010;8(10):1819 — The European Food Safety Authority accepted that zinc contributes to the maintenance of normal skin, hair and nails.