Elevate Your Health: Personalized Nutrition for Longevity & Optimal Wellness.

Science Based, Root Cause Solutions for Complex Health Challenges

I take a holistic and natural approach.

Proper nutrition from what you eat and drink nourishes your body and brain. Food also signals to your body and brain what is going on in your environment. The lifestyle you choose to live also impacts your health. If your goal is to live long and healthy, then start with the foundation – what you eat because diet is the foundation of health.

What to Expect from Me, a Holistic Dietitian Nutritionist...

I don’t give you “band aid” diets or generic handouts. As a holistic dietitian nutritionist, I will give you a comprehensive and complete dietary assessment. I go over your history, diet & lifestyle to develop a personalized nutrition plan tailored to your needs. Additionally, I will review your lab work to identify potential nutritional deficiencies or imbalances, assess digestion and absorption, recommend appropriate supplements to address any gaps, and provide ongoing support throughout the entire process.

Here are some of the things I can help you with to personalized your diet above and beyond what you are used to:

Macronutrient assessment (protein, carbohydrates, fat, fiber, hydration)
Micronutrient assessment (vitamins, minerals)
Blood work assessment/order with a dietitian’s point of view
Functional testing – such as gene testing specified to diet and metabolism, gut health testing, food sensitivity testing, nutrient deficiency/toxicity testing, heavy metals testing, and more!
Continue Glucose Monitor (CGM) guidance & evaluation
Review and recommend supplements
and more

Changing your diet & lifestyle is not easy – let’s work together to reach your health goals, step-by-step.

You can prevent and improve your quality of life with diet and lifestyle – that’s the good news.

Your diet should be realistic and sustainable, not a fad.

Click here for pricing

Typical Dietitian vs. Holistic Functional Dietitian

	Typical Dietitian	Holistic Functional Dietitian
Focus	Primarily focuses on managing specific health conditions through dietary changes. Tends to focus on symptom management.	I focus on identifying and addressing the root causes of health issues. I take a whole-person approach, considering lifestyle, environment, and emotional well-being. Emphasizes optimizing overall health and wellness.
Assessment	Limited to taking dietary history and standard assessments.	I use comprehensive assessments, including: Functional testing (e.g., gut microbiome, food sensitivity, hormone testing), and I offer In-depth bloodwork, genomic review & CGM assessment. I also will review detailed lifestyle and enviromental assesments.
Personalization	Provides dietary guidance based on general guidelines.	I offer highly personalized nutrition plans tailored to individual biochemistry, genetics, and lifestyle to reach your health goals. Emphasizes bio-individuality.
Services	Generalized nutritional counseling for specific conditions (e.g., diabetes, weight management).	I personalize nutrition plans/guidelines offering oncierge service (more in depth and personalized care) including supplementation guidance & functional testing assessment and review.
Approach	Often works within a traditional medical model. May focus on macronutrients and calories.	I integrate a holistic and systems-based approach considering the interplay of various body systems and lifestyle factors.
Root Cause	Less emphasis on finding the root cause of health issues.	I emphasize on identifying and addressing the root causes of health imbalances.

RDadvantage - online dietitian nutritionist in Los Angeles, California

5.0

Based on 11 reviews

review us on

Shannon Dyer

20:30 04 Mar 25

I have had a wonderful experience with On Ki Chan, she has helped me to cure my gastritis and change my diet to further reduce bloating issues related to my gut health issues. Life changing!

Amel Chun

01:10 24 Feb 25

Kimberly Chan Jacobson is extremely knowledgeable about nutrition. She gave me advice about my cholesterol level. She suggested changing (and adding specific vegetables and protein to) my diet. She suggested fish oil supplements. I listened, and by my next doctor's visit (post blood work), my numbers dropped. This is just one example of Kim's advice about improving my health. Mahalo Kim!

Mary A

00:58 24 Feb 25

I highly recommend Kim for anyone looking to improve their health and nutrition. From the very first session, she took the time to understand my goals, lifestyle, and dietary preferences, creating a personalized plan that was both realistic and effective.She provided valuable guidance on meal planning, and making healthier choices without feeling restricted. She is extremely passionate about nutrition and has helped me to improve my overall health. What I appreciate most is her supportive approach, making it easy to stay motivated and accountable.

Martha Sully

00:52 24 Feb 25

Kim is an amazing nutritionist! Working with her has been a game-changer for my health. She goes above and beyond by reviewing blood work and offering personalized advice, supplements, and simple yet effective lifestyle changes (like drinking more water), all of which have led to incredible improvements in how I feel. Not only do I feel so much better physically, but I’ve also gained a deeper understanding of nutrition and its holistic impact on overall well-being. Kim is incredibly pleasant to work with, and her knowledge is vast—she takes the time to explain things in a way that makes sense. She truly cares about celebrating your successes on your health journey and empowering you to continue making progress. Her approach is thorough, caring, and supportive, and I now feel confident in taking charge of my health. If you're looking for someone who truly understands the connection between the gut and total body health, Kim is the person to see!

Dafra Sanou

00:37 24 Feb 25

I had the pleasure of working with On Ki Chan, MS, RDN, and I cannot recommend her highly enough. From our very first session, it was evident that Ki is an expert in her field. Her extensive knowledge and holistic approach to nutrition have been instrumental in helping me achieve my health goals.Ki’s friendly and approachable demeanor made me feel comfortable discussing my dietary concerns. She took the time to conduct a thorough assessment of my diet and digestive issues, reviewing my symptoms and previous approaches to ensure a personalized plan tailored to my needs. Her commitment to understanding the root causes of health issues is truly commendable.Throughout our sessions, Ki provided clear guidance and practical advice, empowering me to make sustainable lifestyle changes. Her passion for optimizing health through diet and lifestyle is evident, and she utilizes functional testing and genetics to help clients reach their healthiest selves.If you’re looking for a knowledgeable and supportive nutritionist to guide you on your journey to better health, I wholeheartedly recommend On Ki Chan. Her expertise and personalized approach have made a significant difference in my life, and I’m confident she can do the same for you.

James Chun

00:11 24 Feb 25

Life-Changing Guidance from Kim Jacobson!I cannot recommend Kim Jacobson highly enough. I went to her feeling lost and frustrated with my health. I'd been dealing with high blood sugar and blood pressure for ages, and my doctor, while well-meaning, hadn't given me any actionable advice beyond general platitudes.Kim was a breath of fresh air! She took the time to truly listen to my concerns and provided me with incredibly valuable, personalized information that I had never heard before. She explained the "why" behind her recommendations, which made it so much easier to understand and implement them. I learned so much about managing my diabetes through diet and lifestyle.Honestly, the information Kim gave me was more comprehensive and helpful than anything I'd received from my own doctor. After following her advice, I felt a significant improvement in my energy levels and weight.The real testament to Kim's expertise came during my follow-up appointment with my doctor. He was absolutely stunned by my progress! He actually asked me what I had been doing differently, and when I told him about Kim, he was genuinely impressed.If you're looking for a dietician who will truly listen, provide you with actionable advice, and help you achieve real results, look no further than Kim Jacobson. She's changed my life!

rey mastrapa

02:11 12 Feb 25

Kim has been extremely knowledgeable and helpful every step along the way! She takes the time to understand her clients and all possible variables to make the best recommendations and decisions. It’s so refreshing to work with someone who has a wealth of knowledge and is personable and easy to talk to! I came with IBS and SIBO discomfort and so far she has given very useful guidance that has already started showing results. I would highly recommend her to anyone.

Veena Thomas

15:57 24 Jan 25

Dr Chan is an amazing nutritionist. She has helped me meet my protein goals, improved gut health and I have learnt so much about nutrition from her. She had helped me manage my allergies. I am grateful for her expertise and consultation

Robert Brombach

01:11 24 Jan 25

Kim Chan has been a godsend for helping me with my digestive issues. A few months ago, I was having major bowel issues. I had loose stools with frequent urgency. After a thorough analysis of my health background, Kim was able to provide a detailed dietary and supplement regimen for me. Through all of my meetings with Kim, she was always patient and made sure to answer any questions I had. Furthermore, she always included the science background information that was related to my issues. This helped for me to visualize and gain a greater understanding of my overall dietary issues. I am extremely grateful to Kim for all of her expertise, support and guidance. She is an outstanding dietician that has great knowledge of her field and truly cares for the well-being of her patients/clients.

Veronica Rose

03:20 20 Jan 25

Amazing!! Kim is SO knowledgeable and really takes the time to take everything into account with your goals and things you’re struggling with. Definitely see her!

Ashley Dawson

02:52 20 Jan 25

Since working with On Ki Chan at Berry Street I’ve seen significant results in my PCOS journey. I haven’t felt this incredible since my teen years. She’s very knowledgeable and more importantly she listens to my concerns. I really couldn’t have gotten this far without her help.

Take Control of Your Health

Are you struggling with gut health, navigating the complexities of women’s health, managing an autoimmune condition, or seeking to optimize your chronic condition such as liver health, high cholesterol, GERD/acid reflux, pre-diabetes or high blood pressure? You’re not alone—and you don’t have to figure it out alone either.

Your health journey is unique, and nutrition is the cornerstone of feeling your best. I go beyond “quick fixes” to provide evidence-based, personalized guidance tailored just for you.

✔️ Heal your gut and regain energy
✔️ Balance hormones and support women’s wellness
✔️ Manage autoimmune conditions with a personalized nutrition plan
✔️ Restore and protect liver health, cholesterol, GERD/acid reflux, metabolism, and blood pressure

Why me?
I understand that health is more than just numbers—it’s about YOU feeling confident, empowered, and supported every step of the way. Working with me, a functional and holistic registered dietitian nutritionist, means getting care that’s as empathetic as it is smart.

Take the first step today.

Contact me or book an appointment here.

Your best health is waiting— I can help you.

Health and Longevity

Personalize your Diet

It is important to be sensitive to your culture and ethnicity and to personalize your diet so that you don’t lose a part of who you are or ignore your genetics.

You can reach longevity and be healthy by optimizing your diet and lifestyle.

You are not destined to have diabetes, hypertension or other chronic diseases that your family or relatives may have.

If you are already diagnosed with a disease, then diet & lifestyle is just as important for prevention as well as reversing it.

Start with your diet first. Look at the quality and quantity of what you are eating. I help you assess how much of each macronutrients (protein, fat, carbohydrates, fiber, water) you need and assess whether you are meeting your micronutrients (vitamins and minerals) needs. Tracking your diet and testing your digestion and gut health are helpful and recommended. Taking a closer look at your digestion starting from the top down – from the time you think of food, chewing, and digesting food, all the way down to eliminating it – this is what it takes to assess digestion.

You not only have to consider what you are eating but also HOW you eat. How you eat affects digestion. You can eat the perfect meal but if you’re eating in a rush, not chewing, and under stress, then you are not digesting well.

When it comes to gut health, I go over your symptoms and poop. Functional stool testing can give you a detailed idea of what is going on in your gut. I can order this and interpret the results so you have a plan for your next steps.

Holistic Registered Dietitian Nutritionist

Your health can be improved.

You can achieve longevity and be healthy & prosperous.

I have a family history of diabetes.

I had gestational diabetes.

I am actively preventing diabetes myself.

I had SIBO.

I improved my diet & lifestyle!

Book with me now

Reviews

She specializes in designing a plan and support for you that is not complex. She provides concrete and easily achievable small goals . I feel very fortunate to found someone who understands the complexity of my situation. She is very understanding. I do not feel overwhelmed and the suggestions are very doable! Highly recommended!

Kim has helped me a great deal as I have been healing from SIBO/IMO. Her encouragement & dietary advice has been tremendously helpful through this process!

RAB

Seeing Kim for SIBO and other liver, gall bladder and pancreas issues. She is very knowledgeable, explains things with ease and has a kind and empathetic spirit. I feel so lucky to have found her. Highly recommended!

Kim is truly heaven-sent! I prayed to find the right dietitian to guide me, and I couldn’t be more grateful to have been matched with her. Kim is incredibly thorough and has an amazing ability to explain things in a way that makes everything clear and approachable. She has completely transformed how I view food and my body, helping me understand how everything works together. Her positive, empowering approach has renewed my confidence and made me feel so good about my journey. I’m genuinely excited for the healing ahead, and this app, with Kim’s guidance, has become an invaluable part of my life. Thank you, Kim, for everything!

Talking with someone who has the knowledge to help me make better choices brings peace to me. Developing a trusting relationship and being able to share my concerns is helpful as well. It’s easy to stay in contact.

My nutritionist truly took the time to get to know me- my likes, dislikes, challenges, and needs. She really seems to meet me where I am and gives me hope that I can make a positive difference for myself. She doesn’t ever make me feel bad, which is quite impressive since I’ve often felt “bad” about myself and my relationship with food in the past. Even if I don’t feel great about my progress, she finds wins and helps to re-motivate me and lift me up. She gives me options and we work together to come up with a plan of small things I can try to see what actually works for me. It’s incredibly personalized and I find value in every session. I’m really glad I stumbled upon this service. I feel like I’m doing something good for myself and I feel like the few small changes I’m making will really add up to make a big difference in my well being.

I love Kimberly, the dietitian I’ve been working with in dealing with cancer.

I’ve been working with Kimberly for a few months now and have been helped enormously. Making dietary changes when it means going against the mainstream way of eating is SO NOT easy. First there is the knowledge component, but also, importantly, the emotional aspect. Even though I already knew quite a bit, I still find that there is so much more to learn and understand about diet and how MY body works, and how I can be my own best support. I’m endlessly grateful for the excellent guidance and support I’ve been getting.

I am extremely satisfied with the services I have received. I have been seeing a dietician that has help me learn to eat an optimal diet for a breast cancer survivor. It has been very reassuring, knowing that I am being guided by experts in the latest science on diet/disease.

I’m impressed with my Nutritionist virtual visits. My nutritionist Kim (On Ki Chan) is extremely smart, as well as personable. I like the work we do together, and I’ve already learned so much, e.g. how to naturally get more magnesium in my diet for muscle growth. There are my own responsibilities – a couple of blood tests, and following recommendations from Kim. I do those things because I’m choose to be invested in the success of this nutritional counseling.
The best part is that these virtual visits are paid by my insurance, so free to me.

How I Can Help You

If you have been struggling with your health and think that you’ve tried everything, then let me help you.

Imagine a day where you wake up and your body feels like it’s on your side. No frantic restroom searches, just the feeling of freedom. You’re not just surviving the day, you’re owning it.

Think about catching up with family and friends, and the conversation isn’t a medical update, but a lively chat about your latest hobby or the hilarious thing your kids or grandkids did. Picture yourself playing tag or hide-n-seek with them, actually having the energy and keeping up!

Moments with your partner are filled with vitality and connection, free from the constraints of fatigue. It’s about that vibrant feeling of being truly present and engaged. It’s about living, not just managing.

Have you tried different “diets” but are still confused?

Is constipation, diarrhea, bloating, and gas affecting your life?

Having gut pain?

Do you have food intolerances?

Are you unsure if you are getting enough nutrients from your diet?

As a Holistic Dietitian Nutritionist, I will guide you along your health journey so you can feel, look, and be your best! You will feel supported and heard.

Contact me – Holistic Dietitian Nutritionist. Virtual Appointments!

I am also in-network with most major insurances – Click here to inquire.

Book with me instantly here.

My Philosophy

Food First, Science Based

Food for health

Food for longevity

Food for nourishment

Food for culture and community

Learn more about me here – functional Registered Dietitian Nutritionist

Your Nutrition / Diet Plan

Personalized

Realistic

Effective

Sustainable

I help you assess what worked, what did not work & why.

I recommend supplements to fill in gaps that diet & lifestyle could not fill and monitor.

I can recommend the gut tests, blood work, hormone tests you need to learn more about what is going on.

It starts with me listening to your story.

I don’t give generic diet, protocols, or handouts.

Life can be stressful and this can affect your food choices. Having a sedentary lifestyle can also affect not only your food choices but your mood and metabolism.

There is hope. The good news is that your body responds well to diet and lifestyle changes.

Book with me instantly HERE (powered by Berry Street)

Considerations and Cultural Sensitivity

I take many things into consideration – your culture, ethnicity, ancestry, religion, genetics, age, family history, gender, sex, blood work, gut microbiome, lifestyle, body type, and diet, food preferences, lifestyle, and work life.

I’ll help you reach your health goals.

Get a diet that is right for you!