You are tired in a way that sleep does not fix. Your hair is thinning, your mood is flat, your periods feel off. You mention it at a check-up and either it is not tested, or the result comes back marked “normal” and the conversation ends there.
For an Indian woman living in the US, low vitamin D and low B12 are so common that they are closer to the rule than the exception. This is not about anything you are doing wrong. It is about biology and geography that genuinely work against you, and the good news is that both are simple to check and usually simple to correct.
This guide covers why these two deficiencies are so common in Indian women abroad, exactly what to test for in the US and what it costs, and how to read your results with a doctor who understands your context, working alongside your US doctor.
Why Indian women in the US are so often low
Three things stack up, and most women have all three.
1. Darker skin needs much more sun to make vitamin D. Your skin makes vitamin D from UVB sunlight, and the melanin that protects darker skin also slows that process. South Asian skin needs considerably longer sun exposure than fair skin to make the same amount of vitamin D.
2. The US sun does not cooperate, especially up north. Across the northern half of the US, winter sunlight from roughly October to March is too weak for the skin to make meaningful vitamin D at all. Add indoor jobs, long commutes and modest dress, and the natural route is mostly closed for half the year.
3. Vegetarian Indian diets are naturally low in both. Vitamin D and B12 come mainly from animal foods (oily fish, egg yolk, fortified dairy for D; meat, fish, eggs and dairy for B12). A vegetarian or largely plant-based Indian diet is low in both by design.
This is not a guess. Research on South Asian communities living in Western countries finds deficiency rates that are strikingly high. A UK Biobank analysis of 6,433 South Asian adults found about 92% were vitamin D insufficient, with vegetarianism, low sun exposure and higher BMI among the predictors (Cambridge, British Journal of Nutrition). A 2020 review summed it up plainly in its title: vitamin D deficiency in Western-dwelling South Asians is “an unrecognised epidemic” (Darling AL, Proc Nutr Soc 2020;79(3):259-271). The studies are mostly from the UK, New Zealand and Canada, but the drivers, melanin, latitude and diet, are the same for Indian women in the northern US.
B12 has its own twist for our patients: if you have PCOS and take metformin, it can lower B12 absorption over time, so the deficiency can creep up even faster. (More on that medication in our guide to metformin for PCOS.)
Why it matters more than people think
Low vitamin D and B12 rarely cause one dramatic symptom. They cause a quiet, cumulative drag, and several of the things they affect are exactly what bring women to me. (For the full list of signs and everyday causes, see our guides to vitamin D deficiency in women and B12 deficiency in women.)
- Energy and mood: persistent fatigue, low mood, brain fog.
- Hair and skin: more shedding, slower recovery.
- Periods and PCOS: vitamin D is involved in how the body handles insulin, and deficiency is very common in women with PCOS. Correcting it is part of the picture, alongside diet and movement. See PCOS symptoms and root causes.
- Fertility and pregnancy: B12 works together with folate, which matters before and during pregnancy. If you are planning to conceive, these are worth getting right early. See our guide to folic acid and B12 before pregnancy.
None of this is meant to alarm you. The point is the opposite: these are among the easiest things in the whole fertility and hormone picture to fix, once you actually measure them.
What to test in the US, and what it costs
You have two easy routes, and you do not need a referral for either.
Order it yourself. Labcorp OnDemand and Quest both let you buy these tests online and go in for a blood draw, no doctor visit needed. Verified prices at the time of writing (June 2026):
| Test | Labcorp OnDemand | Quest (questhealth.com) |
|---|---|---|
| Vitamin D (25-hydroxy) | ~$99 | ~$75 + $6 physician fee |
| Vitamin B12 | ~$49 | ~$49 + $6 |
| B12 + folate | ~$89 | ~$82 |
| Micronutrient panel (D, B12, folate, magnesium, iodine, zinc) | ~$169 (D, B12, folate) | ~$239 (6 nutrients) |
Or ask your US doctor. Many will run 25-hydroxy vitamin D and B12 if you ask, sometimes through insurance. The one practical tip: ask specifically for 25-hydroxy vitamin D (the storage form, the right one to measure), not 1,25-dihydroxy.
A few practical notes:
- HSA/FSA cards are accepted on the self-ordered tests, which is the smart way to pay since they usually are not billed to insurance.
- No fasting is needed, and these can be drawn on any day.
- Results arrive as a PDF in the lab’s portal in about a week, which you can download and share.
”Normal” on the report is not the whole story
Here is something worth understanding before you read your result. Many US labs only flag vitamin D when it is severely low, because the “normal” range printed on the report is set wide. A level that is technically inside the range can still leave you symptomatic, particularly if you are planning a pregnancy or managing PCOS.
So if your number came back unflagged but you still feel unwell, that is a reasonable thing to raise. Ask your doctor what level is right for you, given your symptoms and your plans. This is a conversation to have together with your US doctor, who can prescribe and monitor, not a reason to second-guess the care you are getting. My role is to help you interpret the picture and to fit the nutrition and lifestyle pieces around it.
Message Dr. Suganya on WhatsApp if you want help making sense of your vitamin D and B12 results.
How a cross-border consult works
It is straightforward, and everything happens over WhatsApp.
- Message us with a short note about how you have been feeling.
- We find a time across your zone and send a payment link. Most NRI women pay in rupees from an Indian account; a ₹399 consult is roughly $5.
- A video consult with Dr. Suganya, where we go through your reports, your diet, your symptoms and your goals.
- A clear plan: what to correct, how, and what to take to your US doctor for anything that needs a prescription.
You do not need to order any labs first. If testing is worth doing, I will tell you exactly what and where. For the full picture of how consulting from the US works, see Consulting Dr. Suganya from the USA, and if AMH or ovarian reserve is also on your mind, see AMH testing in the US for Indian women.
A simple plan once you know your numbers
- Test 25-hydroxy vitamin D and B12 (add folate if vegetarian or planning pregnancy).
- Share the result with a doctor who knows your context. Numbers need interpretation, not just a flag.
- Correct with guidance, not guesswork. Vitamin D and B12 are easy to over- or under-do on your own; the right dose depends on how low you are.
- Use diet and safe sun where you can: fortified foods, eggs and dairy if you eat them, sensible midday sun in summer.
- Recheck in a few months to confirm you have actually reached a good level, not just started a bottle.
Frequently asked questions
Why are Indian women in the US so often low on vitamin D? Three reasons combine: darker skin needs more sun to make vitamin D, northern US winters provide too little UVB for about half the year, and vegetarian Indian diets are naturally low in vitamin D. Studies of South Asians in the UK, New Zealand and Canada consistently find very high deficiency rates for the same reasons.
Which vitamin D test should I ask for? Ask for 25-hydroxy vitamin D, the storage form and the standard way to measure your level. In the US you can order it yourself from Labcorp OnDemand (about $99) or Quest (about $75 plus a $6 fee), or your doctor can order it.
How much does a B12 test cost in the US? About $49 at both Labcorp OnDemand and Quest (Quest adds a $6 physician fee). A combined B12 and folate test runs about $82 to $89. HSA/FSA cards are accepted on self-ordered tests.
My doctor said my levels are normal but I still feel tired. What now? The “normal” range on US reports is wide, and a level inside it can still leave you symptomatic. It is reasonable to ask your doctor what level is right for you given your symptoms and plans. A second, context-aware reading can also help you see the whole picture.
Does B12 matter for fertility and pregnancy? Yes. B12 works alongside folate, which is important before and during pregnancy. Vegetarian women and those on metformin are more likely to be low, so it is worth checking early if you are planning to conceive.
Can I just take supplements without testing? It is better to test first. Vitamin D and B12 needs vary a lot by how deficient you are, and the right dose and recheck timing depend on your starting level. Guessing can mean taking too little to help or, with vitamin D, too much.
Can an Indian doctor help me with this from abroad? Yes. You can share your US lab PDF on WhatsApp, and Dr. Suganya will interpret it in the context of your diet, symptoms and goals, and fit the nutrition and lifestyle plan around it, working alongside your US doctor who handles prescriptions and monitoring.
If you are an Indian woman in the US who has been quietly running low and tired, this is one of the most fixable parts of the whole picture. Dr. Suganya consults online, across the diaspora, by video call. You can read how consulting from the USA works, explore the 90-day programs, or start a conversation on WhatsApp. Knowing your numbers is the first quiet win.
