Drop format makes it easy to build a reliable D3+K2 habit around a meal, helping support energy and recovery during weight loss.
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If weight loss has stalled and your energy, sleep, or cravings feel off, low vitamin D could be one piece of the puzzle. These supplement picks make it easier to take a consistent, sensible dose without guesswork.
In-depth Reviews
Thorne Vitamin D/K2 Liquid
- Drop format makes it easy to stay consistent
- Flexible dosing without switching products
- One routine for D3 plus K2
- Not ideal if you need to avoid vitamin K
- Drops require a little more attention than a single softgel
Nature Made Vitamin D3 2000 IU Softgels
- Simple, no-frills daily routine
- Easy to take with a meal
- Widely available and consistent
- Not a flexible dose if you want to fine-tune intake
- No K2 included for those who prefer a combo
Sports Research Vitamin D3 + K2
- Combines D3 and K2 in one daily softgel
- Simple to take with meals
- Good fit for long-term consistency
- Not appropriate if you need to avoid vitamin K
- High-potency may be more than some people need
NOW Foods Vitamin D-3 5000 IU Softgels
- High-potency option in a single softgel
- Easy to take with a meal
- Simple formula that fits most routines
- Too much for some people as a long-term maintenance dose
- Best used with lab guidance, especially if stacking other vitamin D sources
Carlson Super Daily D3 2000 IU Drops
- Great alternative if you dislike swallowing pills
- Easy to adjust intake over time
- Fast to take with breakfast or lunch
- Not as convenient for travel as a blistered pill
- You need to pay attention to accurate dosing
Buying Guide
What We Wish More People Knew Before Taking Vitamin D for Weight Loss
Consistency beats intensity. If vitamin D helps your weight-loss effort at all, it is usually by supporting how you feel day to day so you can follow through on the basics. Pick a form you will take most days of the week and anchor it to a meal you rarely miss (for many people, lunch is more consistent than breakfast).
Take it with food, and do not ignore the “supporting cast.” Vitamin D absorbs better with a meal that has some fat. If you are low energy, crampy, or struggling with sleep, talk with your clinician about whether magnesium intake is adequate, since low magnesium can overlap with similar complaints and may affect how you feel while supplementing.
Know when to get help. If you have kidney disease, a history of high calcium, granulomatous conditions, or you take certain prescriptions (including some diuretics or heart medications), do not self-prescribe high doses. A simple blood test and a clear re-check plan can keep you in the effective range without drifting into “more is better,” which is where problems start.
💡 Editor’s Final Thoughts
Final Verdict: Thorne Vitamin D/K2 Liquid is our top pick because it makes daily consistency easy, offers dose flexibility, and is a solid long-term option when you want D3 and K2 in one routine. If you want the simplest, most affordable maintenance option, Nature Made Vitamin D3 is the no-fuss standby.
See also
If you are tightening up your nutrition, start with our diet tips for women over 40 and pair it with a consistent sleep routine to make fat loss feel easier.
- Strength training basics for women over 40
- Perimenopause symptoms checklist to discuss with your clinician
- Best home blood pressure monitors for accurate daily checks
Frequently Asked Questions ▾
Does vitamin D actually help with weight loss?
Vitamin D is not a weight-loss supplement, but low vitamin D status is common and can overlap with issues that make fat loss harder, like low energy, poorer mood, and less consistent training. If you are deficient, correcting it may help you feel better and stick to your plan, which can indirectly support weight loss. If your vitamin D level is already solid, taking more usually does not add extra fat-loss benefits.
What dose of vitamin D is best for weight loss?
There is no single “best” dose for weight loss, because the goal is usually to reach a healthy blood level, not to take the highest number on the bottle. Many adults use a maintenance dose in the 1,000 to 2,000 IU range, while higher doses are sometimes used short-term when labs are low and a clinician recommends it. If you are unsure, a 25(OH)D blood test is the most practical way to personalize your dose and avoid overdoing it.
Is vitamin D3 better than D2 for weight management?
Most over-the-counter options marketed for general wellness use vitamin D3 (cholecalciferol), and it is generally the preferred form for raising and maintaining vitamin D levels. Vitamin D2 (ergocalciferol) is still effective for some people, but it is less commonly used in everyday supplements. For weight management specifically, the “better” choice is simply the form you will take consistently at an appropriate dose, ideally guided by labs if you have symptoms or a history of low levels.
When should I take vitamin D for best results, morning or night?
What matters most is consistency and taking it with food, since vitamin D is fat-soluble and absorbs better with a meal that contains some fat. Morning is convenient for many people and can reduce the chance you forget. If you take it at night and notice sleep feels lighter or more restless, switch to earlier in the day. If you are also taking other supplements, spacing them out can help you pinpoint what actually makes you feel better.
Do I need vitamin K2 with vitamin D?
Not everyone needs K2, but a combined D3 plus K2 product can be a tidy long-term option if you already plan to take vitamin D daily and want a one-bottle routine. That said, K2 is not appropriate for everyone. If you take prescription blood thinners or have a condition where vitamin K is restricted, do not add K2 without medical guidance. If you want to keep things simple and avoid potential conflicts, choose a plain D3.
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