Welcome to the Omega-3 Study! How Your Responses Will Be Handled* Your responses will be kept confidential. All participants will receive an email confirming their eligibility status (eligible or ineligible). Your responses for this study will be stored to determine eligibility for this study only, and will not be used for any other study. If you are ineligible, your response will not be shared with the research team, but will be stored on the Alethios platform until the study is closed to prevent fraud, "gaming" and using multiple responses from the same individual. All responses from ineligible participants will be deleted at the conclusion of the study, If ineligible, you may later choose to share *only* your name and email address with the Alethios platform to be contacted for other studies you may be eligible for in the future. No other response data will be stored. Please consent to the use of your response as explained above. If you do not consent to the use of your response in this way, you may exit this pre-screener, and no data will be stored. Yes No What is your name?* Please enter your full legal name. Characters Remaining: 7000 What is your email?* Characters Remaining: 5000 What is your mailing address?* Please provide your entire mailing address below. What is your age?* Are you generally healthy and able to complete an 18-week study with digital check-ins?* Yes No What is your height?* Respond in feet and inches, as "5ft 11 in" What is your weight in pounds (lb)?* Round to the nearest whole number Are you currently taking any omega-3 supplements?* Omega-3 Supplements (e.g., Fish Oil, Algae Oil, Krill Oil, Seal Blubber Oil, Mammalian-Sourced Omega-3 Supplements) Yes No Do you have any allergies or intolerances to fish or seafood?* Yes No Have you recently had cancer or cancer treatment?* Cancer in remission for less than one year, except for minor, treated skin cancers (e.g., basal cell carcinoma) or other benign lesions. Yes No Do you have any digestive disorders affecting absorption?* Includes inflammatory bowel disease, celiac disease, liver or gallbladder disease, chronic pancreatitis, or past weight-loss surgery that alters digestion. Yes No Do you have any chronic inflammatory or autoimmune conditions? * Includes poorly controlled asthma, severe allergies, COPD, or immune-related diseases like arthritis, lupus, or multiple sclerosis. Well-controlled asthma (rarely symptoms, no activity limitations and appropriate medication) and managed allergic rhinitis are allowed. Yes No Do you have Diabetes (Type 1 or Type 2)?* Any diagnosis of diabetes Yes No Do you have heavy alcohol intake or substance use?* More than 15 drinks/week (men) or 8 drinks/week (women), or current substance use disorder (past cases over a year ago allowed). A standard drink is 1 beer (12 oz), 1 wine (5 oz), or 1 shot (1.5 oz). Yes No Are you currently taking any of the following medications or supplements on a regular basis (at least 3 times per week or as part of a prescribed regimen)? Please select all that apply:* 1. Frequent laxative use – Regularly taking laxatives like Metamucil (psyllium) or others for constipation. 2. Regularly use corticosteroids – Drugs such as cortisone, hydrocortisone, or prednisone. 3. Regularly use cholesterol-lowering drugs or other blood fats (lipids) – Such as statins (e.g., Lipitor, Crestor). 4. Regularly use medications to lower cholesterol or other blood fats – Such as statins or similar treatments? 5. Take immune-suppressing drugs – Includes biologics (e.g., Humira) or medications like methotrexate for conditions such as autoimmune diseases. 6. Regular use of high-potency corticosteroid creams – E.g., Dermovate, Clobex, Temovate, Ultravate, Vanos, Diprolene. 7. Frequent pain reliever use – Taking NSAIDs (e.g., Advil, Naproxen), Aspirin or Tylenol ≥3 times per week for at least 3 months. Occasional use is allowed. 8. Use prescription weight-loss medications (e.g., Ozempic, Orlistat). 9. None of the above On average, how often do you consume fatty fish per week?* Fatty Fish can include Salmon, Tuna, Halibut, Herring, Mackerel, Sardines, Anchovies, Rainbow Trout Never Once per week 2-3 times per week 4 or more times per week Do you plan to significantly change your diet or activity levels in the next 4 months?* Yes No Are you an active smoker?* Yes No Are you currently pregnant, suspect that you may be pregnant, or planning to become pregnant during the duration of this clinical trial?* Please note: If your situation changes during the course of the study, we ask that you notify the study team immediately. Yes No Are you currently enrolled in any supplement studies?* Note, if you are enrolled in another supplement study via the Alethios platform, your participation will be reviewed prior to confirmation to ensure you remain eligible for this study. Yes No Other "other" option entry Do you currently own any of the following devices?* Please select the device you use. This is a bring-your-own-device study in which participants will be required to connect their device to the study prior to being allowed to participate. Fitbit Apple Watch Garmin Watch Oura Ring Whoop Google Fit Device Are you comfortable wearing your a wearable device daily including during the night?* Yes No Are you able and willing to use a dried blood sample collection kit at home for the purposes of this research study?* The kit will require you to do a blood sample at-home, during which you will need to prick your finger using a device. Kits will be mailed to you at-home and you will be required to package your sample and return it to the research team. Yes No Please reconfirm your mailing address on the following screens so we can get your study kit delivered to you. Mailing Address: Address Line 1* Please enter the first line of your address e.g. 123 Main St. Mailing Address: Address Line 2 Please enter in the second line of your mailing address. e.g. Apt 4G Mailing Address: City* Please enter your city name. e.g. "San Francisco" Mailing Address: State* Please enter as initials e.g. "CA" for California. Only US residents are eligible for this study. Mailing Address: Please enter your Zip Code.* e.g. 94112 What is your phone number?*