Supplements·Nov 11, 2026 · 16 min
Vitamin D in Winter: D3 vs D2, How Much to Take, and When
In winter, skin makes little vitamin D across much of the north. What the research says about D3 vs D2, how much to take, timing and safe upper limits.
Natural health · Herbal wellness · Free
Your natural health & herbal wellness AI
Science-backed answers about medicinal plants, supplements, nutrition and mental wellness — from AI experts that remember you.
Free and unlimited, no account needed · Not medical advice · For clinicians
Live
Messages sent & received
AI Experts
Pick the expert for your question
Each one is focused on a single area of health, and all of them share what they learn about you — so you never repeat yourself.
AskMN
Expert in herbal & general health
AskMN is the one to start with. Ask about a medicinal plant, a supplement, a lab result, a medication interaction or a symptom, and get a clear, sourced answer.
- “What is ashwagandha good for?”
- “Can I take magnesium with my blood pressure meds?”
- “What do my lab results mean?”
Sylvia
Expert in mental wellness
Sylvia helps with the mental side of health: stress, low mood, anxiety, sleep and burnout. She listens first, then offers evidence-based tools you can actually use.
- “I've been feeling burned out”
- “Help me manage stress and anxiety”
- “I can't fall asleep at night”
NutriGen
Expert in nutrition & gut health
NutriGen is your nutrition expert: meal ideas, gut health, energy, weight, electrolytes and the foods that support a condition you're managing.
- “Anti-inflammatory meal plan for a week”
- “Best foods for gut health”
- “Optimize my macros for energy”
Genomics · Invite only
Genlyy
Your DNA, decoded. Genlyy reads your genetic variants and tells you what they mean for your health, medications and nutrition. The other three experts can use it as context.
Blog
Latest in natural health
New posts every Tuesday & Friday
Supplements
NMN and NAD+: Can These Longevity Supplements Actually Slow Aging?
Sep 4, 2026 · 14 min
Health Tech
VitalIQ vs Traditional Remote Patient Monitoring: Wearables, Dashboards, and Family Access
Jun 27, 2026 · 14 min
Health Tech
How to Monitor an Aging Parent's Health Remotely Without Being Intrusive
Jun 27, 2026 · 14 min
Library
Herbs, teas, lab results and conditions — what the research says
423+ condition guides, 253+ herb and supplement profiles, evidence-graded tea guides and plain-English lab result explainers: uses, dosing, interactions, evidence.
Herbs for…
All evidence guidesAnxietySleepStress and cortisolEnergyInflammationLiver healthDepression and moodFocus and memoryDigestion and bloatingImmune supportMenopauseHormone balance for womenBlood sugarBlood pressureCholesterolWeight lossHair growthSkin and acneLibido and sexual healthJoint pain and arthritisMigraine and headachesSeasonal allergiesCold and fluKidney healthMuscle growth and recoveryDopamine and motivationPCOSThyroidGut healthBrain healthHeart healthLymphatic drainageConstipationMen's healthWomen's healthPerimenopauseFertilityNerve painUTISore throatCoughAcid reflux
Best tea for…
All tea guidesBlood test results explained
All markersPopular herbs & supplements
Full libraryCommon health conditions
All conditions A–ZAnxiety DisordersDepressionInsomniaType 2 DiabetesHigh Blood PressureHigh CholesterolAcid Reflux (Heartburn)MigraineIrritable Bowel Syndrome (IBS)HypothyroidismMenopausePolycystic Ovary SyndromeArthritisBack PainFibromyalgiaAsthmaEczemaAcne VulgarisAttention-Deficit/Hyperactivity DisorderSleep ApneaLong COVIDGoutPsoriasisObesity
Free tools
Useful things you can do right now
Powered by Mother Nature AI
freehealth.ai: the operating system for human health
One app for all of it. Your medical records from your doctors, your labs, your wearables, nutrition, fitness, sleep, mind and medications, in one place. A FreeAge score that shows how your body is really doing. And Maya, an AI you can ask anything, built on Mother Nature AI.
- Medical records & labs
- Wearables & Apple Health
- Nutrition, fitness & sleep
- Medications & mind
- FreeAge biological age score
- Ask Maya anything
For clinicians & care facilities
Clinical tools and VitalIQ continuous monitoring
Free SOAP notes, intake templates and patient summaries for practices — and a screenless wearable with a multi-patient dashboard for nursing homes and care facilities.
Private by default
Health data is encrypted at rest using AES-256 and in transit using TLS 1.3. Mother Nature AI does not use your conversations or health information to train its models unless you explicitly opt in. If you do, your information is de-identified first, and you can withdraw at any time. You can delete your account at any time. Deletion removes your data from all Mother Nature AI systems within 30 days.
Educational, not diagnostic
Mother Nature AI is not a medical device. Answers are educational and informational. Treatment decisions belong with you and your provider.
Evidence first
Answers and articles point to the research they draw on. Our editorial standards explain how claims are reviewed and what counts as evidence.
Frequently asked questions
What is Mother Nature AI?
Mother Nature AI is a free natural health and wellness assistant. Ask about medicinal plants, supplements, nutrition, symptoms, lab results and mental wellness, and get clear, science-backed answers from AI experts that remember your health context.
Is it free?
Yes. Chat is free and unlimited with no account. Sign in free to save your conversations, give the experts memory across visits, and build a health profile. The condition guides, herb and supplement library, blog and tools are free too.
Who are the AI experts?
AskMN covers herbal and general health, Sylvia covers mental wellness, and NutriGen covers nutrition and gut health. Pick one from the dropdown in chat, or switch mid-conversation — they share what they know about you.
Does Mother Nature AI replace my doctor?
No. Mother Nature AI is an educational tool that helps you understand health information. It does not diagnose or prescribe. Always consult a qualified healthcare provider for medical decisions.
How is my data protected?
Health data is encrypted at rest using AES-256 and in transit using TLS 1.3. Mother Nature AI does not use your conversations or health information to train its models unless you explicitly opt in. If you do, your information is de-identified first, and you can withdraw at any time. We do not sell personal health information. Mother Nature AI maintains HIPAA-compliant safeguards for applicable protected health information.