Protein or Moisture: What Does Your Hair Need?
10 min read Ingredients Updated 5 October 2026 By Anna Sophie Schulenburg
Most hair needs moisture first and protein only now and then, and a single wet strand stretched slowly tells you which one yours is short of right now. If it snaps after a short stretch and your hair feels dry and straw-like, give it extra moisture for two washes and leave out protein products. If it stretches a long way like chewing gum and stays stretched, swap your next moisture mask for a protein treatment or bond care. You can tell whether you have picked the right direction after two or three washes, when you comb through your wet lengths.
What protein and moisture do inside the hair
Your hair is made mostly of keratin, a protein that gives the fibre its strength and shape. Water inside the fibre keeps it flexible, which is why well-hydrated hair gives a little under the comb instead of breaking. It needs both.
Moisturising care binds water and slows down its loss. Protein care contains small, broken-down pieces of protein. They settle where bleach, colour or heat have made the fibre porous, and the hair feels firmer to the touch. Both effects last a while and then wash out over the following washes. No product builds new hair substance.
The ingredient list tells you what is in your products. Proteins appear as Hydrolyzed Keratin, Hydrolyzed Wheat Protein, Hydrolyzed Silk, Hydrolyzed Collagen, Amino Acids or anything with “Peptide” in its name, moisture binders as Glycerin, Aloe Barbadensis Leaf Juice, Panthenol or Sodium PCA. Ingredients are listed by quantity, apart from the very small amounts at the end. If a protein comes before Parfum, there is more than a trace of it, and the product counts as a protein product in your routine.
Hair that has never been coloured or bleached and still feels rough rarely needs protein. A good routine for dry hair is usually enough, and you only do the stretch test if that routine has made no difference after four weeks.
Protein or moisture? The strand stretch test (elasticity test)
The test takes a minute. After washing, before any conditioner goes in, a few shed hairs almost always end up between your fingers or in the comb. Take one of them, as long as possible, and keep it wet. Hold it in the middle of its length between the thumb and index finger of each hand, about five centimetres apart, and pull slowly. Leave out the tip, which has almost always taken more wear than the rest. Test three hairs, because a single one may happen to be especially thin or damaged. Always compare wet with wet, since dry hair naturally stretches less.
| What you notice | Lacks moisture | Lacks strength | Too much protein |
|---|---|---|---|
| When stretched | Snaps after a short stretch | Stretches a long way, stays stretched | Snaps at once, barely stretches |
| Dry to the touch | Rough, straw-like, crackly | Limp, tangles easily | Hard, stiff, wiry |
| Wet to the touch | Normal, soaks up conditioner fast | Mushy, doughy | Firm, the comb catches |
| What happened recently | Central heating, hot water, frequent washing | Bleach, colour, lots of heat | Several products with keratin or protein |
| After a moisture mask | Better, for a day or two | Even limper | Hardly softer |
If your hair stretches a little and then springs back, the balance is fine and you stay with your routine. Straw-like and hard feel much the same at first. The last row tells them apart: dry hair softens after a mask, protein-overloaded hair hardly does, and it has usually had keratin products beforehand.
Do two rows from one column match your hair? The free hair analysis asks about your hair's history, thickness and feel one by one.
Protein overload and too much moisture: the signs
Protein overload usually happens when protein turns up in almost every step of the routine, in shampoo, conditioner, leave-in and styling spray, or when a protein treatment comes every week although the hair has no need for it. The hair then becomes firm but inflexible. You can recognise it by these signs.
- The lengths feel hard and stiff even though you condition regularly.
- More short, broken pieces than usual are left in the comb.
- The hair looks dull and is hard to detangle.
- Curls and waves lose their bounce and stick out.
- It started after a new treatment or a new product with keratin.
The opposite happens too. If you finish every wash with a rich mask and then keep your hair wet for hours, you end up with limp, mushy lengths that give like rubber when wet. With every wash the fibre soaks up water, and as it dries it contracts again. The wear from this constant swelling and shrinking is called hygral fatigue. How much it matters for a single hair has not been studied in detail. In everyday terms, keep porous hair wet for as short a time as you can.
Where the imbalance comes from
The causes are listed in the order you should check them. The first two cost nothing.
| Cause | How you recognise it | What to change |
|---|---|---|
| Hot water, frequent washing, skipped conditioner | Hair is fine briefly after washing, then quickly turns straw-like | Wash lukewarm, conditioner from ear level at every wash |
| Hair stays wet for hours, a mask at every wash | Lengths limp and doughy, styles fall flat | Squeeze out after washing and rough-dry promptly, mask once a week at most |
| Bleach, colour, straighteners | Rubbery when wet, lots of broken pieces in the comb | Protein treatment or bond care once a week, straighteners only with heat protection and on a medium setting |
| Protein in every product | Hard, stiff, crackles despite conditioning | One protein product per wash at most, two washes with none at all |
| Residue from styling products and silicones | Hair feels coated or waxy, conditioner sits on top | Wash once with a clarifying shampoo |
The last row is easily mistaken for protein overload, because coated hair feels stiff as well. If it feels normal again after a clarifying wash, the cause was product build-up on hair and scalp rather than protein. Heavily lightened hair often lands in the rubbery column, because bleach weakens the fibre from the inside. When caring for bleached hair, plan bond care in as a fixed step and alternate the moisture mask with it.
Your routine in four steps
The amounts are for shoulder-length hair. For chin-length hair use about half, for chest-length about double. Steps 2 and 3 depend on your column in the stretch test.
Step 1 — Wash. Massage a walnut-sized amount of shampoo into your scalp with lukewarm water, and let the lather running down clean the lengths. For dry hair a moisturising shampoo works, for example from MONAT's Advanced Hydration System for fine to medium hair or from the richer Renew™ Hydrating System for thick hair.
Step 2 — Condition. If moisture is missing, spread a hazelnut-sized amount of conditioner from ear level down and leave it on for two to three minutes. Once a week the Super Moisture Masque replaces the conditioner, for five minutes. If strength is missing, use the same amount of a strengthening conditioner, such as the Bond IQ™ Fortifying Conditioner, and once a week a protein treatment instead. After the treatment, put a little light conditioner on the ends so the hair dries soft. Save the moisture mask for a different wash.
Step 3 — Seal. Squeeze your hair out with a cotton T-shirt. Then work a pea-sized amount of leave-in, meaning care that stays in the hair, through the lengths: the Restore™ Leave-In Conditioner for dry hair, the Bond IQ™ Peptide Therapy Leave-In Creme for rubbery hair. Finish very dry ends with one or two drops of REJUVENIQE® Oil.
Step 4 — Dry promptly. Keep porous hair from sitting wet for hours. Blow-dry the roots first, with the dryer on a medium setting at 15 cm, then the lengths. If you prefer air-drying, wash in the morning instead of the evening so your hair is dry before it meets the pillow.
How often protein? Rules for adjusting
The table is a starting point that you check with the stretch test.
| Your hair | Moisture | Protein or bond care |
|---|---|---|
| Natural, never coloured, on the dry side | Conditioner every wash, mask once a week | Every four weeks at most, often never |
| Coloured or regularly blow-dried | Conditioner every wash, mask once a week | Every two to three weeks |
| Bleached, rubbery when wet | Conditioner every wash, mask alternating with the treatment | Once a week until the hair springs back in the test |
| Fine and quickly flat | Light conditioner, mask every two weeks | Only if the stretch test calls for it, then every two to four weeks in a small amount |
When something changes, these rules apply.
- Change only one product at a time and judge it after two or three washes.
- If your hair turns hard, stiff or crackly after a protein treatment, leave out everything with protein for two washes and use a moisture mask instead.
- If it goes limp rather than soft after a mask, that was too much. Next time use half the amount, and the mask only every two weeks.
- Once the rubbery hair springs back in the stretch test, cut protein down to every two to three weeks.
- If you need both, alternate: one wash with a moisture mask, a later one with a protein treatment.
Home remedies and myths: what helps and what does nothing
- The float test in a glass of water, meant to show porosity, can't measure it. Whether a hair sinks depends on product residue, sebum and the water's surface tension.
- Egg or mayonnaise masks do no harm and do little. Their proteins are too large to get into the fibre, and most of them rinse away. Rinse egg out with cool water, or it sets.
- Rice water makes hair feel firmer, because its starch leaves a thin film around the fibre. On hard, protein-sensitive hair that adds to the stiffness, and it has no place in your hair overnight, because the hair then stays damp for hours.
- A protein treatment makes hair stronger only for a while. Its protein pieces wash out, which is why you repeat it at the rhythm in the table.
- Oil puts no water into hair. It slows water loss and, applied before washing, the strong swelling during the wash.
- Fine hair doesn't automatically need protein. Fine describes the diameter of the fibre and says nothing about damage.
What to look for after one wash, four weeks and three months
After the first wash with the new care, check whether the comb glides more easily through your wet lengths and whether the ends feel soft once dry, rather than hard or limp. With protein overload it often takes two or three washes for the hardness to ease, because the protein pieces have to wash out first.
After four weeks, repeat the stretch test with three hairs. If the hair now springs back a little, you are heading the right way. If it still snaps at once, work through the causes table again from the top.
After three months the roots have grown about three centimetres, and in the stretch test they often behave differently from the ends, because they have been through neither bleach nor much heat. Trim the ends off bit by bit instead of propping them up with more and more protein.
When a dermatologist can help
Protein and moisture concern the lengths of your hair. If you are shedding clearly more hair than usual or bald patches appear, no hair care will change that. See a dermatologist about it, because increased shedding can come from iron deficiency, the thyroid or a skin condition. A shed hair has a small, pale bulb at one end, while a broken one ends bluntly or frayed, and that is how you can tell hair breakage from hair loss.
What care can do
Support cleansing, conditioning, manageability, shine, frizz control, protection from avoidable breakage and a fuller-looking appearance, depending on the product and its substantiated claims.
What it cannot do
Diagnose disease, correct hormonal causes, create new follicles or permanently fuse fully split hair ends.
Quick questions
Can a conditioner contain both protein and moisture?
Yes, many do. What counts for your routine is which of the two comes first in the ingredient list, and how your hair responds after two or three washes with the product.
Do curls need more moisture than straight hair?
Usually, yes. Sebum from the scalp travels down a wavy fibre less easily, so the lengths are often drier. Care for curls and waves therefore starts with moisture and uses protein sparingly.
Does a protein treatment help with split ends?
No. It makes porous areas feel firmer and can reduce further breakage when combing, but a split end stays split until it is cut. Even a rich hair mask only smooths it down until the next wash.
Does protein make fine hair thicker?
No. The diameter of the fibre stays the same. The protein pieces make the surface feel firmer, so fine hair feels slightly fuller until they wash out.
Does eating more protein help dry hair?
No, as long as you eat normally. A real protein deficiency, for example after a very strict diet, can make hair thinner and more brittle. If you suspect one, see your GP, who can check your diet and blood levels.
Whether your hair is short of strength or water right now, the free hair analysis sorts it out from your hair's history and how it feels.