Every week someone shows me a bag of supplements they've tried. Biotin. Collagen. A gummy their friend swore by. A "hair, skin, and nails" blend from the grocery store. Most of the time, they're frustrated — and some of the time, they've spent hundreds of dollars on the wrong thing.
Supplements help most when they fill a gap
A supplement can't override genetics or fix a scalp problem. What it can do is correct a shortfall that's holding your hair back. If your body is low in something your follicles need, filling that gap can make a real difference. If you're not low, more usually doesn't mean more hair.
That's why I'd rather know what you need than guess.
The common ingredients, honestly
Biotin — true biotin deficiency is uncommon, so extra biotin rarely helps most people. High doses can also skew certain lab results, including thyroid tests, so tell your doctor if you take it before bloodwork.
Iron — low iron is one of the most common contributors to shedding I see, especially in women. If your ferritin (stored iron) is low, the answer isn't always just more iron — it can point to a storage or absorption problem, so the cause needs a closer look. Only supplement iron with lab confirmation; too much can be harmful.
Vitamin D — low levels are common, especially in Idaho winters, and are linked to several types of hair loss.
Zinc — helpful when low; too much can backfire.
Protein and collagen — your hair is made of protein. If your intake is low (common during weight loss or GLP-1 use), this matters.
Saw palmetto and other botanical DHT blockers — may modestly support people with pattern thinning. The evidence is promising but limited, and they aren't a replacement for proven treatments.
Adaptogens like ashwagandha — may help with stress, which can contribute to shedding.
A note on your lab results: "good" or "okay" isn't an acceptable answer. Lab ranges are broad, and you can land inside them while still being too low to support healthy hair growth. Ask for your actual numbers. What we want to hear is that your labs are optimal.
How to choose a supplement
Find out what you need first. Bloodwork with your doctor or an Epigenetic Hair Strand Analysis can point you in the right direction.
Look for third-party testing from a brand you trust — ideally one your trichologist recommends for your specific needs.
Check the sugar in gummies if you take them daily.
Give it time. Hair grows about half an inch a month. Judge any supplement after three to six months of consistent use, not three weeks.
Pair it with the rest of the plan. Supplements support treatment; they rarely replace it.
Where supplements fit in my plans
For most clients, a supplement is one piece of a bigger picture that includes scalp health, targeted treatment like TED or Cold Atmospheric Plasma, and at-home care. I carry products I trust in my clinic, and I'll tell you honestly whether you need one at all.
The bottom line
The best supplement is the one that fixes what you're actually missing. Stop guessing, start with the root cause.
Not sure what your hair needs? Book your Hair + Scalp Evaluation and bring your supplements — I'll review them with you.