Marine collagen has quietly become one of the most searched ingredients in hair supplements. Patients ask me about it often, usually with two questions back to back: does it actually work, and Isn't collagen just broken down into amino acids in your gut anyway, so how would it reach your hair follicles at all? Both are fair questions, and both deserve a straight answer rather than a marketing one. Here's what the research actually shows.

Creatine is one of the most widely used supplements for strength, exercise performance, and muscle development. For years, I was telling patients with hair loss to avoid it. But the evidence has shifted and I've had to update my position. Here is what the research actually shows, including the first controlled trial to directly measure hair parameters during creatine supplementation, published in 2025.

Telogen effluvium is a form of diffuse hair shedding that may occur after the normal hair-growth cycle is disrupted by a physiological or emotional stressor. Common triggers include illness, high fever, childbirth, surgery, rapid weight loss, restrictive dieting, significant emotional stress, medication changes and nutritional deficiencies. Shedding commonly becomes noticeable two to three months after the triggering event.

Iron deficiency can be associated with diffuse, non-scarring hair shedding, even when a person’s haemoglobin level remains normal. However, not every person with low ferritin will experience hair loss, and not every case of hair loss will improve simply by taking iron.

Can Vitamin A Cause Hair Loss? Why Both Too Little and Too Much Can

Written by Dr Heng Jiacheng, MBBS, Diploma in Aesthetic Medicine (AAAM)Associate Member, ISHRS · Member, AAHRS. Insights from a Singapore-based hair-loss physician Finding hair on your pillow, in the shower drain, or caught in your hairbrush can be alarming. One of the most common questions we hear in clinic is: "How many hairs should I lose each day before it's considered abnormal?" The reassuring answer is that hair shedding is completely normal. Every healthy scalp sheds h

Can Weight Loss Cause Hair Loss? Yes. Rapid or substantial weight loss can trigger telogen effluvium, a common form of temporary, diffuse hair shedding.

Learn how testosterone, estrogen and gender-affirming hormone therapy affect transgender hair loss, plus evidence-based treatment options, hair transplants and supplements.

GLP-1 receptor agonist medications, including semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) have been linked to hair shedding in some patients. The good news: this type of hair loss is usually temporary and manageable. Here's what the latest evidence says and what you can do about it.

If you're a new mother watching clumps of hair come out in the shower, you've probably wondered whether breastfeeding is to blame. It's one of the common misconceptions I hear from time to time. The short answer is no. But understanding why not, and what is actually happening, can make a real difference to how you approach recovery.

Despite Singapore’s year-round sunshine, vitamin D deficiency remains surprisingly common. Research has also found lower vitamin D levels in people with several forms of hair loss - but association does not necessarily mean causation. Here is what the evidence actually shows.

Postpartum hair shedding can be alarming. Hair may begin falling in noticeably larger amounts several months after delivery, often when a new mother is already managing sleep deprivation, nutritional demands and the physical recovery from pregnancy.

Most hair supplements list twenty ingredients on the back of the box. Few explain why those ingredients were chosen, what the evidence behind them is, or how they work together. This article does exactly that for the Roots² AGA Protocol, the formula designed for adults experiencing androgenetic alopecia AKA pattern-related hair thinning.

Biotin is one of the most purchased hair supplements in Singapore. Walk into any Watsons or Guardian and you will find it prominently displayed, often at doses of 5,000mcg or higher, with claims about thicker, stronger, faster-growing hair. Or even biotin gummies - my good friend swears by them. The clinical evidence tells a more complicated story.

Most hair supplements in Singapore contain the same long ingredient list and claim to work for everyone. In clinical practice, that approach doesn't hold up. Gradual pattern thinning, sudden diffuse shedding, and postpartum hair changes are biologically distinct processes. Treating them with the same formula is like prescribing the same medication for three different conditions because the symptoms look similar.