Our Science

The science behind Nivkara

Healthy hair is decided in three places. Water, scalp and root.

Most hair routines only look at the root. But the water you wash with and the build-up on your scalp change what any oil can do. Nivkara is built as a 3-layer routine, and on this page we show the research behind each layer, including where the evidence is still weak.

01 Water 02 Scalp 03 Root
Nivkara hair oil, shampoo and hard water softener on a lab bench with herbs and glassware
How to read this page

Every claim carries its evidence level.

Traditional use, a rat study and a human trial are not the same kind of proof. So we tag each one, and we don't present a lower level as if it were a higher one.

Traditional use

Used in Indian hair care for generations. Tells us what to study, not what is proven.

Lab & animal

Cell or animal studies. Shows a possible mechanism. Results may not repeat in people.

Small human study

Real people, but few of them or no control group. Promising, not settled.

Controlled trial / review

Randomised trials or expert reviews. The strongest level we cite.

01
Layer 1 · Water

Your bath water carries minerals. Your hair feels them.

Hard water is water with a lot of dissolved calcium and magnesium. Much of India's borewell and tanker water is hard. Those minerals can settle on hair and scalp after every wash.

How hard is "hard"?

Indian standard

Total hardness, measured as mg of calcium carbonate per litre. India's drinking water standard (BIS IS 10500) sets the acceptable limit at 200 mg/L and allows up to 600 mg/L where there is no other source.1

200
BIS acceptable
486.7
study water3
600
BIS max
0100200300400500600700 mg/L
Microscope-style view of a hair strand coated in mineral deposits beside a clean strand

Illustration: a strand with mineral build-up (top) next to a clean strand (bottom). Not a photo from a study.

Does hard water weaken hair?

Mixed evidence

Two lab studies tested the same question and got different answers. We show both.

Study A (2018): hair strength after 3 months, 70 hairs per group3

Untreated
255.5
Deionised water
254.8
Hard water
234.2

Mean tensile strength. The hard-water group was about 8% weaker (P = 0.001). Water hardness: 486.7 mg/L.

Study B (2013) soaked hair from 15 volunteers in hard or distilled water for 30 days and found no significant difference in strength or elasticity.2

What we take from this: short exposure may not matter much, but months of very hard water may make strands easier to break. More research is needed.

Why acidity matters

Review

Hard water and most soaps are alkaline. The hair fibre itself sits near pH 3.67 and the scalp near pH 5.5. A higher, alkaline pH adds negative charge to the fibre, which increases friction and frizz.4

3.67
hair fibre
5.5
scalp
9.0
most alkaline
shampoo tested
02468101214 pH

Outlined range: pH of 123 shampoos tested in the same study (3.5 to 9.0). 62% were above pH 5.5.4

Nivkara Hard Water Softener
For this layer

Nivkara Hard Water Softener

One cap in one bucket of bath water. Made with apple cider vinegar, a naturally acidic ingredient, for a gentler-feeling wash on hair and skin.

See the softener
02
Layer 2 · Scalp

Oil, sweat and flakes build up. Clean them without stripping.

The scalp makes its own oil. Add hair oil, pollution, sweat and dead skin, and the roots can feel heavy and itchy. A good wash lifts this build-up while leaving the scalp comfortable.

Woman touching oily roots at her scalp
Nivkara Reetha Scalp Detox Shampoo
For this layer

Reetha Scalp Detox Shampoo

Reetha, rosemary and salicylic acid in a 100 ml wash. No SLS, no parabens.

See the shampoo

Reetha (soapnut)

Lab study

Reetha shells contain saponins, natural plant compounds that foam and lower the surface tension between oil and water. That is the basic job of any cleanser. Lab work on soapnut saponin has measured both effects.5

Traditional use as a hair wash in India goes back generations.

Salicylic acid

Clinical trial

Salicylic acid is a keratolytic: it loosens the bonds between dead skin cells so flakes wash away. In a randomised trial of 154 people with dandruff, a shampoo with 3% salicylic acid and 1.5% ciclopirox, used 3 times a week for 4 weeks, worked as well as a 2% ketoconazole shampoo.6

That trial tested a combination product at a medicated strength. Our shampoo is a cosmetic wash, so we do not claim the same result.

Rosemary

Clinical trial
100people, 6 months, rosemary oil vs minoxidil 2%

In a randomised trial on pattern hair loss, both groups had a significant rise in hair count at 6 months, and the difference between them was not significant.7

The trial used rosemary oil left on the scalp. Our shampoo contains rosemary extract and is rinsed off, so it is a fresh-scalp ingredient here, not a regrowth claim.

03
Layer 3 · Root

Oil, massage and 19 herbs. A routine you can repeat.

Pre-wash oiling does two jobs. The oil coats and lubricates the strand, so it breaks less during combing and washing. The massage brings attention and gentle pressure to the scalp. The herbs are where tradition and early research meet.

Oil lubricates the hair shaft

Review

A dermatology review of hair cosmetics notes that regular oiling improves lubrication of the hair shaft and helps prevent breakage.8 This is the best-supported benefit of hair oil, so it is the one we lead with.

Hair oil poured into a palm before application

Scalp massage

Small human study

9 healthy men used a 4-minute daily scalp massage for 24 weeks. Hair got thicker. Hair count and growth rate did not change significantly.9

Week 0
0.085
Week 24
0.092

Average hair thickness in mm. Small study, no control group.

Fingertips gently massaging the scalp
The four herbs named on the label

Bhringraj-led, inside a 19-herb blend

Botanical plate of bhringraj, brahmi, ashwagandha root and jatamansi rhizome

Clockwise from top left: bhringraj, brahmi, jatamansi, ashwagandha.

Animal study

Bhringraj

Eclipta alba

In rats, a 5% extract put more hair follicles into the growth phase (69 vs 47 in controls) and did better than minoxidil 2%.10 Not yet shown in humans.

Animal study

Jatamansi

Nardostachys jatamansi

Its root extract and isolated compounds showed hair-growth activity in a lab study.11 Not yet shown in humans.

Traditional use

Brahmi

Bacopa monnieri

A classic herb in Indian hair oils. We list it for its traditional role, not for a proven hair effect.

Traditional use

Ashwagandha

Withania somnifera

A well-known herb in Indian tradition, part of the full blend. We make no hair-growth claim for it.

Nivkara 19-Herb Bhringraj Hair Oil
For this layer

19-Herb Bhringraj Hair Oil

Apply to the scalp 2–3 times a week, massage gently for 5–7 minutes, leave 1–2 hours or overnight, then wash.

Shop the hair oil
At a glance

What the research supports, and how strongly.

Claim Evidence level What was actually studied Source
Oil lubricates hair and helps reduce breakage Review Dermatology review of hair cosmetics [8]
Lower pH means less friction and frizz Review Literature review plus pH test of 123 shampoos [4]
Salicylic acid helps clear flakes Clinical trial 154 people, combination shampoo, 4 weeks [6]
Rosemary oil and hair count Clinical trial 100 people, leave-on oil vs minoxidil, 6 months [7]
Hard water weakens hair Mixed Two lab studies on human hair, opposite results [2] [3]
Scalp massage thickens hair Small study 9 men, 24 weeks, no control group [9]
Reetha cleans Lab study Foaming and surface tension of soapnut saponin [5]
Bhringraj and Jatamansi support hair growth Animal study Rats and lab models, not humans [10] [11]
Where it's made

Made by a licensed partner in Jaipur.

Nivkara hair oil is manufactured by our partner in Sitapura, Jaipur. The process behind every bottle is documented, not judged by look and smell alone.

AYUSH licensed

Manufacturing partner holds AYUSH manufacturing licence RJ 846-AYU.

GMP facility

Produced at a facility that follows Good Manufacturing Practice.

Batch checks

Each batch goes through quality checks before it is packed and shipped.

Our limits

What Nivkara is not.

Not a medicine

Sudden, patchy or heavy hair loss needs a dermatologist, not a new oil.

Not overnight

Hair grows slowly. Any routine needs weeks of regular use, and results vary.

Not proof for every herb

Animal studies and tradition are a starting point. We label them as exactly that.

Not "more is better"

A measured amount and a gentle massage beat soaking the scalp or rubbing hard.

Start with the layer you need most.

Hard water at home, a heavy scalp, or weak roots. Or all three, as one routine.

Shop the routine
References
  1. Bureau of Indian Standards. IS 10500:2012, Drinking Water – Specification (Second Revision). Total hardness as CaCO3: acceptable limit 200 mg/L, permissible limit 600 mg/L.
  2. Srinivasan G, Srinivas CR, Mathew AC, Duraiswami D. Effects of hard water on hair. Int J Trichology. 2013;5(3):137–139. doi:10.4103/0974-7753.125609
  3. Luqman MW, Ramzan MH, Javaid U, et al. To evaluate and compare changes in baseline strength of hairs after treating them with deionized water and hard water and its role in hair breakage. Int J Trichology. 2018;10(3):113–117. doi:10.4103/ijt.ijt_115_16
  4. Gavazzoni Dias MF, de Almeida AM, Cecato PM, et al. The shampoo pH can affect the hair: myth or reality? Int J Trichology. 2014;6(3):95–99. doi:10.4103/0974-7753.139078
  5. Yekeen N, Malik AA, Idris AK, et al. Foaming properties, wettability alteration and interfacial tension reduction by saponin extracted from soapnut (Sapindus mukorossi). J Pet Sci Eng. 2020;195:107591. doi:10.1016/j.petrol.2020.107591
  6. Squire RA, Goode K. A randomised, single-blind, single-centre clinical trial to evaluate comparative clinical efficacy of shampoos containing ciclopirox olamine (1.5%) and salicylic acid (3%), or ketoconazole (2%) for the treatment of dandruff/seborrhoeic dermatitis. J Dermatolog Treat. 2002;13(2):51–60. doi:10.1080/095466302317584395
  7. Panahi Y, Taghizadeh M, Marzony ET, Sahebkar A. Rosemary oil vs minoxidil 2% for the treatment of androgenetic alopecia: a randomized comparative trial. Skinmed. 2015;13(1):15–21. PMID 25842469
  8. Gavazzoni Dias MF. Hair cosmetics: an overview. Int J Trichology. 2015;7(1):2–15. doi:10.4103/0974-7753.153450
  9. Koyama T, Kobayashi K, Hama T, et al. Standardized scalp massage results in increased hair thickness by inducing stretching forces to dermal papilla cells in the subcutaneous tissue. Eplasty. 2016;16:e8. PMID 26904154
  10. Roy RK, Thakur M, Dixit VK. Hair growth promoting activity of Eclipta alba in male albino rats. Arch Dermatol Res. 2008;300(7):357–364. doi:10.1007/s00403-008-0860-3
  11. Gottumukkala VR, Annamalai T, Mukhopadhyay T. Phytochemical investigation and hair growth studies on the rhizomes of Nardostachys jatamansi DC. Pharmacogn Mag. 2011;7(26):146–150. doi:10.4103/0973-1296.80674

This page is for education. Nivkara products are cosmetics and are not intended to diagnose, treat or cure any disease. Some images are illustrative.